After several years of using the SB800 with my Nikon D200 while shooting weddings and events, and after writing numerous posts about this on the Nikonians Speedlight Forum , I decided to consolodate my thoughts in this blog.
Note: I use the term TTL to mean the same thing as iTTL throughout this blog.
Look at the two pictures above. Notice that the first one appears as though the subject is in a cave. The background is black. But the second one has noticeable detail in the background. This blog post is about being able to adjust between these two extremes at will.
Flash photography is a pretty complex subject, and you have to study it a while to understand it. It is also a very rewarding subject and leads to much better pictures in many situations.
The first concept to wrap your head around is that when you take a flash picture it is actually a combination of two exposures; one from available light (also called ambient) and the other from flash. Already you may be able to see intuitively that flash photography will be easier in the dark, because the contribution from ambient is zero! This concept is critical to understand.
And, it is also probably intuitive that if the ambient light is bright, things can get a lot more difficult as you try to balance the two contributions to the image.
So, Nikon made things much easier for us by developing their camera and flash metering systems - these are two completely separate systems that are used together or separately, depending on how we set up our camera/flash.
So let's look at the simplest situation first; a dim room where there is only a little ambient light; like what you would find in a typical indoor home setting at night. If you take a picture in such a setting without flash, in one of the auto modes, say A mode, a typical aperture/shutter would be about f/4 and 1/4th sec at ISO 100.
Now, put the camera in manual mode and increase the shutter to 1/80th sec and leave the aperture at f/4 and shoot another shot. The picture will be very very dark - to the point that the image is barely discernable.
Now, turn on the flash in TTL mode and shoot that same shot, leaving the shutter at 1/80th and the aperture at f/4 (still in camera manual mode). You will see that whatever is in the center of the frame will be properly exposed by the flash. This is because the flash metering system handled the exposure and added just the right amount of flash power to get a proper exposure. It still may not be exactly the right exposure for other reasons, but I'll discuss that in a future blog entry.
Now, place a subject (a person is perfect for this) relatively close to the camera (say 5 feet) with a background behind the subject (say about 15 feet away), still in typical home indoor lighting. Make sure the subject is in the center of the frame and shoot a flash shot in straight TTL (not TTL-BL) leaving the camera settings at f/4 and 1/80th sec. You will find that again the subject came out properly exposed, because the flash metering system handled the exposure. But the interesting thing is that the background behind the subject is back to being very dark, just like in the shot without flash. This is because the flash power decreases very quickly from the distance of the subject to the background and it barely brightens the background at all.
Now, decrease the shutter speed to 1/10th sec and shoot again. The background will be brighter, but the subject will be the same brightness as before. Also, the subject will be sharp, but the background may also show some motion blur, because 1/10th sec is too slow to hold the camera perfectly still (unless you use a tripod). Since the flash was primary on the subject; ie, the ambient was overpowered by the flash, and the flash duration is normally faster than 1/1000 sec, the subject will be sharp with no motion blur.
This shows you that in a dim room, the flash exposure of the subject is controlled by the flash metering system and the background exposure is controlled by the settings on the camera. You can adjust them separately! This is the key behind using the flash in TTL mode and the camera in Manual mode.
Even when the ambient lighting is a little brighter than this, you can still use this technique if you stop down the camera aperture enough to make the flash the primary light on the subject, which takes the ambient light out of the equation. But then your background becomes dark. And if you try to brighten it by decreasing the shutter speed, then the bright ambient light will begin to affect the subject brightness too, and you begin to risk overexposure of the subject. In this situation, shutter, aperture, and flash power all affect the brightness of the subject. It's usually best to simply live with a dark background in this situation and make sure the flash is primary on the subject.
Now, if you are in bright ambient light (like outdoor in daylight), it is simply too bright to be able to take the ambient out of the equation by stopping down the camera, so now you have to balance the flash and the ambient. If the flash contribution to the shot will be less than the ambient contribution, then it is called Fill Flash. When there is a lot of ambient, the background and subject are no longer able to be adjusted independently, and camera manual mode becomes difficult to use. This is when you want to switch the flash to TTL-BL and the camera to one of the automatic modes (S, A, or P). The camera will then measure the ambient light to set its aperture and shutter and send this information to the flash, after which the flash metering system will set the power of the flash to make the subject the same brightness as the background.
If the ambient is extremely bright, like direct sunlight, then it's usually best to select P or S mode (and TTL-BL), so the aperture will automatically stop down to avoid overexposure. In A mode, the shutter will increase to reduce the exposure, but it will be limited by the flash sync speed of 1/250th (D200) and that is often not high enough for bright light if a wide aperture is selected.
One caviat for TTL-BL: the subject must be darker than the background for TTL-BL to work properly. The flash can only brighten the subject to balance it with the background; it can't make the subject darker. If the subject is brighter than the background to begin with, then you probably are best off not using flash. However, there can sometimes be slight shadows on the subjects face that can be 'lifted' with a very slight amount of flash in TTL mode.
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130 comments:
A really, really useful blog.
Keep 'em coming (with as many examples as you can muster!)
Thanks for the nice comment!
Russ
Russ,
Your “Nikon CLS Practical Guide” write up for the Nikon SB series Speedlight is superb. If your write-up came in the box with my SB-600 or my D80, I would not have spent so much time on the web trying to clarify information contained in the Nikon User Manuals.
Nikon did not take the time to explain the interaction of the camera and flash systems that make up CLS, i-TTL and i-TTL BL. Without the additional information you provided, one would need to spend hours experimenting, as you did, to fully understand the interaction of the various flash and camera settings.
Your explanations are clear and make it easy for one to understand how the camera settings, flash setting and lighting situations are processed for “i_TTL” and “i-TTL BL” exposures and the impact they have on one another.
Thanks for taking the time to consolidate this great paper.
lovelowrey
lovelowry,
Thanks for the nice comments and the inspiration to keep adding to this blog.
Russ
I'm so glad I found your blog. I can't wait to read what else you have to say! Thanks for sharing what you've learned with us and making it easier to understand.
Cindy,
Thanks for the nice feedback. I'm glad it is helpful to you.
Right now the wedding business is pretty slow, so I have lots of time, but Easter marks the start of the busy times, and I won't have much time for studying things Nikon from then until the end of the year.
Russ
This is the most wonderful resource, as I set out to master my new speedlights. You've demystified something complex for me.
Thank you, from Melbourne Australia.
- Jeremy
Jeremy,
Thanks for the nice feedback. If anything needs more explanation, please let me know.
Russ
Really great articles. I just recieved my sb800 a couple of days ago and was finding some of the concepts very confusing. You did a really excellent job of making a complex subject easy to understand. Please do keep posting!
Mark,
I appreciate your feedback. Please let me know if there are areas of the Nikon CLS that need more detail or clarifications.
Thanks,
Russ
Russ, your blogs are great for a beginner who is totally baffled by the whole Speedlight and camera adjustements that Nike really does a poor job of explaining. Your articles are very enlightening.
Thanks! Let me know if something's still not clear.
Russ
Hello Russ,
Thank you so much for this blog. I just read these comments of yours and they are very very clear and informative.
Quick question - at the end you say it is better to shoot in P or S with TTL-BL because camera will revert to 1/250 of a second. I was under impression the whole idea of -BL is to match the ambient. Correct me if I am wrong.
Once again, thank you for this extremely informative blog.
Michael
Hi Michael,
You are correct that the reason for TTL-BL is so that the flash will match the ambient. The flash metering system does this by first analyzing the brightness of the background from the metered data from the camera. Then it adjusts its power to make the subject the same brightness as the background.
So, to say it another way, the camera metering system controls the background exposure, and the flash metering system controls the flash power to match the subject to the background.
Now the reason I suggest using with P or S when shooting fill flash (TTL-BL is only for fill flash) is easiest explained by example. Go outside and try this.
Given:
- bright daylight
- ISO 200
- TTL-BL on the flash to fill the shadows on a person's face and to brighten the face to match the brightness of the background.
- A mode and f/3.5 so you can minimize depth of field.
This is all good in concept, but it won't work! Try it
Aim at your subject and shoot. The result will always be a totally blown out image from extreme overexposure.
Why?
Because the shutter speed that is needed with f/3.5 on a sunny day is typically around 1/3200th, but the camera limits the maximum shutter to the flash sync speed speed of 1/250th.
Obviously, if the correct exposure called for 1/3200th and instead you used 1/250th, the result is going to be total blow out.
Now, switch the camera to P mode. Instantly, the camera metering sets up around 1/250th sec shutter speed and f/11. The small aperture is the key! The camera controls the exposure with the aperture, because it can't raise the shutter any higher when the flash is attached.
That's why I say it is much easier to simply use P mode.
One negative thing you may have noticed. When you shoot fill flash, you have to give up narrow depths of field. You have to use small apertures. You simply have no choice.
Please let me know if this helps.
Russ
Russ,
Is the two meter approach the reason why the camera meter shows a very underexposed setting when using aperture priority with sb800 on camera in iTTL in your dimly lit room experiment? IS there any way to get the in camera meter to take into account the on camera flash and the settings you have programmed in? Thanks
beareos4,
No, the reason the camera always shows an underexposure is that the shutter is limited to 1/60th second. 1/60th sec is too fast for a low ambient condition, even when you have a fast lens of f/2.8. In fact the correct shutter would be around 1/4th sec.
The camera always meters the ambient. The flash metering is self-contained within the flash computer, and it has no effect on the camera metering.
So, the real question is, why would the camera limit the slowest shutter to 1/60th? Well, the reason is that when the light is dim, you do not want it to contribute to the exposure of the subject, because then any motion of the subject or the camera would appear as ghosting. 1/60th is usually chosen, because that it generally accepted as the slowest shutter speed that a normal person can hold it steady enough to avoid camera motion blurring.
However, if you really want the shutter to go more slowly, like on a tripod, for instance, all you have to do is switch to 'slow sync'. Then, the shutter will go as slow as it needs to to allow a normal exposure from the ambient.
I hope this helps.
Russ
Russ,
Thanks for the clarification on the metering. This is very good information. I have spent many hours reading different forums looking for a clear explanation of this subject and yours has been the most helpful. I have book marked it in IE. Thanks very much for sharing. Steve O'Sullivan (beareos4)
Steve,
You are quite welcome. It has taken me quite a long time to figure this all out and my hope is to save others that same hassel. Once you fully understand the Nikon Flash System, it makes it much easier to make consistantly good flash pics.
Russ
Hi Russ,
Great stuff you put together here. It is the first time I read a total explanation of how the flash system works. I am now reading it again from the start as I found that to be able to apply all this in the field, one needs to understand it inside out.
Maybe I am missing something but in your example above, where you say to use a shutter speed of 1/10 to brighten up the background, shouldn't this be more something like 1/50? Since ambient light is correctly exposed at 1/25, using 1/10 will give an over exposed motion blurred shot with no extra light from the flash.
Thanks,
Pedro
Hi Pedro,
Thanks for the feedback.
I'm not sure where you got the 1/25th second shutter, but I think that paragraph 8 (not counting the note) explains that the normal exposure for dim indoor ambient is somewhere around 1/4th second at f/4 and ISO 100.
As an experiment, put your camera in A mode with f/4 and ISO 100 selected, and let it tell you what shutter would be required for a dim indoor ambient condition (typical incandescent lighting). I think the camera will choose somewhere around 1/4th sec.
So, when shooting flash shots, the required speed of the shutter to light the background always depends on the brightness of the background, the f/ stop, and the ISO. In this case the background was very dim, and I normally like to light the background about 1 or 2 stops underexposed, so 1/10th is about 1.5 stops underexposed.
I hope this helps. Please let me know.
Russ
Hi Pedro (again),
I forgot one thing.
If your camera indicates 1/25th second for the correct exposure, then you are in very bright ambient light, and in that case I would increase the shutter to about 1/100 sec if shooting flash to underexpose the background by 1 to 2 stops.
Sometimes I underexpose the background by up to 3 stops in order to emphasize the subject a little more.
Also, you mentioned blur. As I said in my blog, the subject will be sharp due to the flash, and a little blur in the background is fine.
Russ
Russ,
Thanks for your reaction, it makes perfect sense. I see where I went wrong: I saw 1/4 second, did the arithmetic and mentally recorded 0.25 which then got translated in my brain to 1/25 second.
Cheers,
Pedor
I must say it is one of the best explanation to the Nikon CLS flash system!! Just one quick question though, how to decide when to use TTL flash mode vs TTL-BL flash mode? In a room with dim lighting, is it ok to use TTL-BL?
Raymond,
Thanks for the compliment!
The general rules:
1) Use TTL indoors in dim ambient
2) Use TTL-BL outdoors in bright ambient.
3) Between these extremes (like indoors during the daytime with light coming in from outside), you have to make a shot by shot decision.
I always look at the background, and if there is anything bright back there (like a window), I use TTL-BL. If the background is dark I use TTL.
Russ
That's a very useful tip, will definitely keep that in mind, thanks Russ!
I've been using SB-600 since 2006 and today I fully understand the meaning of TTL-BL flash. Nikon never explain how TTL-BL works and it takes someone else to do for them. Thanks for the great explanation. Keep it coming.
from Malaysia
Remi,
It's always nice to get this kind of feedback!
Thanks,
Russ
hi russ
finally something that will help me get the hang of my SB-800.
Keep clicking ..
Vinay
Hi Vinay,
I'm glad my article helps. The flash takes lots of time to fully understand, but it is very rewarding.
And I'll definitely keep clicking!
Thanks,
Russ
i bought my sb800 several months ago and the user manual provided by nikon is of little help for me to correctly expose my subjects in both low-light and brighthly-lit background situations. your CLS guide is heaven-sent and i always refer to it first before going to a shooting assigment.
thank you, Russ, for sharing your expertise.
sir_siano,
You are most welcome! I'm glad my blogs help you!
Thanks,
Russ
Howdy Russ
I've shared this blog with 3 other Nikon shooters. Excellent content and thank you for sharing your experience/knowledge. I'm also pursuing the 2nd career as a photographer but not quite finished with the first.
To the point:
Will I get the same exposure results when bouncing the light (with flash in TTL, camera in manual mode, use the FV lock, and shoot in low ambient light)...as I would when shooting directly?
For example...if I attach the trapezoid shaped material promoted at "abetterbouncecard dot com" to my SB800 (in order to experiment with the various angles of light)
will the SB800 still be able to manage the flash exposure with reasonable accuracy?
Thanks for your time.
kudos to your entire postings. hat's off to you. what is now missing in my understanding of the sb800 is how A and AA works with respect to the metering modes. i figure you could save me a month on the internet, only to get bad info :-) appreciate any help. thanks in advance
Hi Michael,
Thanks for the nice comments about my blogs!
Yes, you will get the same basic exposure whether you bounce or use the flash aimed directly at the subject.
Of course, these two exposures will look different, because the light will be coming from different directions. This can cause some common parts of the image to be exposed differently when compared to each other, but the overall image will have the same exposure either way.
This is very dependent, however, on the flash being strong enough to overpower the ambient light. If the ambient light is too strong, then the flash may have enough power to overpower the ambient when in the direct mode, but not have enough power when bounced. In this case the two images will not be exposed identically.
One other thing that you didn't ask about is the aperture. It doesn't matter what aperture you select (within the power limits of the flash). The exposure will always remain the same. Of course the depth of field will change.
As far as modifiers like the better bounce card, it doesn't matter what you do to the flash. You will always get the same exposure if the flash has enough power to do it.
This is the beauty of the wonderful TTL system! You can bounce, modify, adjust aperture, or shoot direct, and the TTL metering system simply automatically sets the power of the flash to give the same reflected light from the subject in the center of the frame. The only caveat (to repeat myself) is that the flash must have enough power to do what it is being asked to do, and the ambient light must be dim enough so as not to cause any effect on the image.
Once the ambient light is bright enough to affect the image, you have to switch to a mentality of fill flash instead of flash primary. That's a whole other subject.
I hope this helps,
Russ
To Anonymous,
Thank you, as well, for the kind feedback!
You're right. I have not mentioned the A and AA modes in any of my blogs. I guess this was because I have never considered them as part of the Nikon CLS (Creative Lighting System). However, on further thought I guess they are simply extensions of the CLS.
So, you have now inspired me! I will write a new blog about how these two modes work!
Thank you for your input,
Russ
Just want to say thank you for you very well explained blog!!!
Delphine,
I appreciate the nice feedback.
Thanks, Russ
Great blog to read! Thanks a lot!
One little question. Instead of choosing P or S to get the speed slower like 1/250, can we add a 3 stop ND for such problem in order to enable us to use wider F stops? That will make similar effect like 1/2000 with a narrow DOF right?
Hi Kane,
Thanks for the nice feedback on my blog.
And you have a good idea there!
Yes, using a Neutral Density (ND) filter will effectively reduce the ambient light from the camera perspective and allow you to use a wider aperture to achieve correct exposure. The wider aperture will preserve the narrow depth of field you really want.
I never thought of this because I shoot weddings, and there would never be time to install the ND filter. However, under many other circumstances, there would be time to do that, so it should work just fine.
Also, in case it may not be obvious to others reading this, the ND filter will cause the flash to increase power automatically, and the proper fill will be achieved up to the maximum range of the flash. Of course, the maximum flash range is reduced just like when stopping down the aperture, so you have to be closer to your subject than normal or the flash will not be powerful enough to provide the fill you want.
Thanks,
Russ
Thanks for the extra information.
I did not think about ND will also reduce flash effectiveness. You are right, to a real case like wedding, we just don't have time to screw up ND and then take it off for the next shoot. Beautiful scenery just don't wait.
Thanks again!
I was just directed to your blog from the flickr strobist group and it is awesome!!! I have always been scared of my speedlights so I'm really looking forward to poring through this. Thank you so much for such a readable guide!
Leesia,
Why thank you very much for your kind words! I'm glad you find my blog helpful.
Please ask questions if something is not clear.
Regards, Russ
hey russ,
just come across your blog by accident - while in another nikon forum. just wanna let you know that i really find this very informative. these are the things i really wanted to learn since i got my sb800 a few months back. i just finished reading your first entry & i already learned so much. many thanks for taking time out from your busy schedule & sharing these things with us. again, many thanks & more power. i'll keep on reading & i hope you don't get tired of sharing...
nicol
Hi Nichol,
I appreciate your nice feedback!
And I don't think I will ever get tired of posting about this subject.
Russ
Russ
I've read the full blog and had many ah ha! moments. Now I know what FV means and, more importantly, discovered how useful it is in practice. Many thanks on a fantastic job.
Alistair
Hi Alistair,
Thank you for the nice feedback!
I had many of those 'ah ha' moments myself as I figured out this stuff on my own. It's really too bad Nikon doesn't put this information in the manuals.
I'm happy to hear that my work has helped you out.
Russ
Man.. I've been using my SB-600 wrongly since I got it more than a year ago..
I used to think that the TTL-BL mode will set the flash output so that it would be the achieve the most ideal balance between the subject and the background.. At least that's what I got from the lousy manual. Coz of this I never bothered using the TTL mode. No wonder I never am satisfied with my flash-ed images.
Many thanks for starting this blog and I shall put this newfound knowledge to good use.
cnxc323,
Thanks for your nice comment!
However, the flash user's manual is actually correct. The TTL-BL mode does balance the subject to the background. The problem is that the manual leaves out a lot of additional explanation that is required to use TTL-BL properly.
TTL-BL is designed for when the subject is darker than the background, like in most outdoor daylight shots, and especially in all backlighted shots. Then, the flash increases the brightness of the subject to equal the background. This is commonly called 'fill flash'.
However, if the subject starts out brighter than the background, like in most indoor shots, TTL-BL will still try to balance the subject with the only means it has - flash power. It will lower the flash power in a futile attempt to balance the already brighter subject to the darker background, which is of course impossible, so it will leave the whole image at the brightness of the dark background. This is why you get many dark images when you use TTL-BL indoors.
Thanks again,
Russ
Russ, I'm kind of late to your blog and want you to know that you have taken a 500lb gorilla off of my back!!! Nikon should add a link to your blog on the cover of the flash manual for people like me. For the first time I'm feeling confident about my SB-800. Once again Thanks Russ.
Hi John,
Don't worry; you're not late!
But I'm not sure what to do with your gorilla! :)
Thanks for the nice feedback, and stay tunred. I have several more articles I am working on.
Russ
Great Blog Russ. I'm thankful to you for your clear and easy to understand article on the Nikon Speedlights and CLS. I look forward to reading all your future articles.
Hi Tony,
Thanks for the nice feedback. I have about 15 articles posted already, and I am working on several more as time permits.
Russ
In short,thank you,thank you,thank you...Now I can say that I understand the concept.
To Anonymous,
Thank you! I'm glad my blog has helped!
Russ
Russ,
I'm not sure you've touched on exposure compensation yet (at least, I've not run across it if you have).
From what I gather, with the Nikon system, if you dial in -1 EC in the body, you need to dial in +1 EC on the flash. -2 in the body, +2 on the flash. I've read where with Canon, this isn't the case. You can -1 or -2 EC in the body and eTTL takes care of it from there.
Have you experienced this and if so, can you touch on it?
Thanks,
Matt
Hi Matt,
Yes, I have already written about how camera compensation works with the flash in thgis article: http://nikonclspracticalguide.blogspot.com/2008/02/5-study-in-camera-compensation-when.html
Also, please be very careful with your terminology. In the Nikon system, it is called 'iTTL'. Canon calls it 'eTTL' which is not the same and works differently.
Let me know if that covers what you wanted me to cover.
Russ
Thanks Russ.
"...Also, please be very careful with your terminology. In the Nikon system, it is called 'iTTL'. Canon calls it 'eTTL' which is not the same and works differently..."
Exactly, which was question was about. With Canon's eTTL (as in my post) you dial in +/- compensation in the body and the you don't have to adjust the flash. With Nikon's iTTL (or so I've been told) when you dial +/- compensation in the body, you then have to dial in the opposite +/- on the flash.
Thanks for the pointer to your previous article. I will head there now.
Thanks!
Matt,
Sorry, I didn't read your post closely enough and missed that you mentioned Canon.
Russ
Hi Russ,
I'm one of your instant and very grateful fans. :-)
I have a question though. In trying to achieve the negative space effect with the background almost pitch black, I've noticed that the distance between the subject and the background is a very big factor.
Is there a way/settings to still get the same effect if there are some nearby objects that are close enough to the object to reflect light coming from the flash?
I made some tests where I first turned off the flash and I got a very dark exposure so I would say that the camera settings should have been enough to cancel out all ambient light. But when I turn the flash back on, I get reflections from those nearby but immovable objects.
Any advice?
Thanks for the nice feedback!
Yes, the distance between the flash and subject is critical. It sets the brightness of the flash assuming you are using TTL mode. If the subject is close, then the flash power is set very low
Also, since the flash power decreases as the sqaure of the distance, anything farther from the flash (like the background behind the subject) will get dark very quickly the more distance you leave behind the subject.
You mentioned that you already have the ambient very dim. This will eliminate all the ambient from the image, leaving the background black, but it won't help with nearby objects.
If there are objects nearby that you want the flash NOT to light, you don't have many options, since the flash power will be much stronger the nearer you get to the flash.
One option is to 'flag' the object. That's when you have an assistant or use a light stand to hold a large square of black fabric between the flash and the object in order to cast a shadow on it.
Another idea is to place your flash closer to your subject on a stand so that it doesn't cast any of its light onto the nearer object. Then, you fire your flash using the Commander in your camera.
Hope that helps,
Russ
Russ:
Great overview and easy to understand explanations. I am new to flash and just bought a SB900. I know the principles will be the same as with the 800, but do you plan to make any "refinements" in settings, etc. appropriate to the 900. Thanks for your help. You must have some teaching experience because of the logical way you communicate.
To Anonymous,
Thanks for the very nice comments!
At the moment, I don't have any plans to buy an SB-900, so I won't be able to offer any specific advice for that model. However, I believe that they are essentially identical except for the user interface and the fact that the 900 recognizes when it is attached to a DX camera and zooms farther to account for the crop factor.
Yes, I have taught in the past. I taught engineering and math at USF while I was working on my Masters degree in Electrical Engineering in 1975. I also am an FAA Certificated Flight Instructor, and I substitute teach math and science at the high school.
Please let me know if there is anything unclear in my blog.
Russ
I posted a question on the Strobist Flickr group and was referred to your article. It's one of the clearest and most useful explanations I've read - thank you so much for taking the time to write it.
To Anonymous,
Thanks for the nice feedback! I hope you find all my blog articles useful.
Russ
Hi Russ,
I just found a link to your page from the Strobist group at Flickr and I REALLY appreciate your explanations. You are great at explaining the fundamentals and then building from there. Really appreciate your sharing this with us. I am just getting back into photography, after many years away from it, and the whole off camera flash area is really interesting to me, but still working on the learning curve. Thanks for your help!
Mark D.
San Francisco, CA
Hi Mark,
Glad you found me! And thanks for the nice feedback!
Stay tuned!
Russ
This is just so useful. When I first got my D300 I thought it was faulty and even took it back to the shop to test. It was only by reading this blog and reading the camera manual several times that I worked out that in Matrix mode the built in flash uses i-TTL BL. Of course using this as a default meter setting I got underexposed pictures indoors. Now I have an SB 600 that gives me more control and consistently good results indoors using straight i-TTL and matrix metering.
I really wish Nikon had better instructions - it should still be possible to use a camera like this out of the box! PAUL
To anonymous,
Yes, Nikon makes great equipment, but it takes a lot of experimenting to figure out how to use it because of the marginal documentation. One of the biggest problems they have is that the documentation is written by marketing people, and the design engineers who really know the details aren't involved.
I wonder if you have discovered that you can force your D300 internal flash into regular TTL by selecting spot metering?
Thanks for the kind feedback on my blog! I'm glad you find it useful.
Russ
Very comprehensive and ease to understand for new flash player like me.
Thank you very much for your time and effort writing this explanation.
I'll keep coming to this blog.
Hanif
Hanif,
I'm glad you find my blog useful. Please let me know if anything is not clear.
Thanks,
Russ
Hi Russ,
I wanted to make sure I understood correctly a few comments within some of your answers to questions. In manual mode on the camera and TTL on the flash, does the flash take into consideration the aperture one sets on the camera. I am not sure I understand why changing the aperture does not affect the exposure of the subject. For this to be true, the flash would have to adjust output knowing the aperture has changed.
Thanks,
Jeff.
Hi Jeff,
Yes, the TTL flash computer (in the camera) knows the f/ stop and it sets the power of the flash to make the subject the same brightness regardless what f/ stop you choose (within the maximum power limits of the flash).
So, when in TTL mode, if you change the aperture, the power of the flash changes to keep the subject at constant brightness.
However, changing the aperture will change the amount of ambient contribution to the image, but when shooting TTL, that normally only affects the brightness of the background, because you normally overpower the ambient on the subject with the flash by a wide amount, so you don't see much effect on subject brightness as the aperture is changed.
If you are shooting where the ambient is contributing significantly to the brightness of the subject, then changing the aperture will cause some change to subject brightness as well as major changes in background brightness.
Hope that makes sense,
Russ
Hi Russ,
Should I also set the Flash Shutter Speed to something slow like 1/15 when shooting in manual, or will it adjust accordingly? BTW, I also notice that I can't switch to SLOW as one of the flash options when in M mode.
Thanks,
Jerry
Hi Jerry,
The purpose of Flash Shutter Speed (FSS) is to keep the shutter speed high enough for handholding when using the camera automatic modes A and P.
Consequently, FSS cannot be set to less than 1/60th (on my D200). You can set higher, but not lower.
However, you can override the FSS by selecting Slow or Rear Sync. Then, when in A or P, the shutter will automatically go down to speeds that will allow the background to show brightly. However, if you do that while handholding the camera, the background will have lots of motion blur.
In M and S modes, the camera doesn't control the shutter - your do. That's why FSS is not in effect in those modes.
Also, Slow cannot be selected when in M mode, because all Slow Sync does is allow the shutter to go to slow speeds. But if you are in M mode, you are controling the shutter manually. The camera doesn't have any control. You can still set Rear Sync in M mode, because that just tells the flash to fire right before the curtain closes.
Example: Low ambient light, like indoors at night. When shooting family pics, the shutter will sit on 1/60th all the time if you use A or P modes. If you want a lower speed, you can switch to Rear or Slow Sync to have the camera set it automatically for you, or you can set the camera to M or S modes and you set it to whatever you want.
I use M mode in low ambient conditions (like in a restaurant or at a party) and normally set the shutter to 1/80th to reduce background blurring because I am handholding.
Remember, when in low ambient light, the flash controls the exposure of the subject. That's why you can use M mode and set the shutter and f/ stop to anything you want, and the subject will always be the same brightness. The shutter and f/ stop control the background brightness.
Hope that helps,
Russ
Thank you so much for taking the time to even put into writing your hard learned experience in this.
The example of this you gave
Given:
- bright daylight
- ISO 200
- TTL-BL on the flash to fill the ---
I was using it the other day before i came across your blog. I was shooting on a very bright day to fill in flash on a tiny subject about a feet away from the camera. I tried and i tried and i tried..about 20 times LOL. every shot was overexposed and frustration mounted.
Now I understand. i've tried to read up and stuff but its seriousl a very difficult subject. For now, at least i understand one and it makes a difference to me. Thank you for helping the clueless "flashers" out there. thank you!
Hi MissS,
I've been there!
Controlling Fill Flash is one of the most difficult things to learn in flash photography. Too much and it blows out the shot, and too little doesn't get rid of the shadows. Nikon's TTL-BL helps a lot with that in bright ambient conditions, but you still have to understand the bit about the shutter being limited to 1/250th. That's why I always recommend a new fill shooter use P mode on the camera until they fully understand what is going on. Incidentally, at my studio we joke that 'P' mode stands for 'Professional' mode, since we all use it when we have to go quickly from indoor shots in a dark church to outdoors in bright daylight and don't have time to fool around with camera settings.
I'm glad my blog has helped.
Russ
I've printed out this page since you dont have a book (yet) and its like 37 pages long (lol)...the questions posted by readers and your answers were all so priceless too!
Most importantly you tried to explain as simply and dont make it intimidating for one to ask. Some forums can be very intimidating.
, thank you again Mr Russ MacDonald..
MissS,
Thanks! I appreciate the kind words!
Russ
Hi Russ,
I haven't got a flash unit yet, I planned to but was a bit put off from experience borrowing my friend's SB-800 unit. I was totally frustrated and clueless on how to use it. Your articles and your answers to the questions posted here has been most helpful in every way. Thank you so much!!
Now i have no doubt to get myself a flash unit and to have fun exploring the possibilities with it.
Paul
I recently made the mistake of not resetting my ISO and was shooting at ISO 400 in Aperture Priory mode with a Nikon SB600. The photos were very noisy and I put it down to the ISO. Am I correct in thinking this caused the excessive noise?
Thanks for all the time you put into this wonderful Blog.
Hi Paul,
Yes, be sure to get the flash! Once you learn how to use it, you'll love it!
Thanks for the nice feedback!
Russ
Hi Jenni,
ISO 400 on a modern DSLR should not be too noisy. If you look closely, you can detect noise at ISO 400 on your computer screen, but it is not normally visible in a print.
Use of the flash doesn't affect the noise.
To minimize noise at any ISO, expose to push the pixels in the histogram toward the right edge.
Russ
Hi Russ,
There's something I don't understand yet about using speedlight on nikon..
Pardon me for the bad english but here goes, when you use the flash unit wirelessly(TTL mode) via commander on the camera body, do you have to point the flash unit sensor(on the front side) to the subject(ie: in the middle), in order to get a correct flash exposure? If say i wanted bounce the flash or there are two units of wireless flash, does all the strobes sensor has to point to the subject in the TTL mode?
Much appreciated,
Paul
Hi Paul,
Your English is fine!
The sensor on the flash itself is not used when using TTL.
The Remote flash fires its monitor preflash, and the reflected energy is measured by the sensor in the camera. Then, the Commander on the camera sends the calculated flash power back to the flash, and after that tells it to fire.
Another important thing to know is that the reflected energy from the monitor preflash is metered by the camera in the center weighted frame. That's why it is important to make sure the subject is at least partially centered. If the subject is way off-center at the edge of the frame, use FV Lock and recompose.
Russ
Wow that's such a fast response from you. Thanks Russ!!! That last bit of Nikon wireless flash system clears it up for me!!
Thank you very much Russ!!
I'm definitely getting myself a flash unit soon, saving up for one.
In the meantime, I'm going to borrow my friend's SB-800 to practice(Manual flash too), and ofcourse I'll keep checking your wonderful blog regularly to read and understand better if I have missed/forgot some points. I've also suggested your wonderful blog to my friends to read.
Cheers,
Paul
Hey Paul,
I'm glad I could help, and thanks for the kind feedback!
Be sure to read the questions and answers after each blog for additional information that I have not yet included in the initial post.
Russ
hi Russ, i benefit a lot from your article, may i raise a question about the example shown shooting at 1/10s, the subject will be exposed correctly without blur while the background has a little blur due to the flash duration is normally faster than 1/1000 s.
i had shot night portrait at shutter speed 1sec, but both the subject and background blurred a lot, why did the subject also get blurred with the flash duration faster than 1/1000 s?
the exposure time of the blog example is 1/10s, how can the bacground exposed at 1/10s, while the subject exposed at 1/1000 s? in my understanding, the entire pic including the subject and background should be both exposed at 1/10s instead.
i know my understanding is probably wrong, please feel free to correct me.
best regards,
Ho
Ho,
First, you are thinking correctly. If the background is exposed for 1 second, so is the subject. I think I should have explained myself better.
My comments refer to a scene where the subject was much much darker than the background. In this case, if I left the flash OFF, the 1/10th second exposure left the subject so extremely underexposed, that it could be treated as though the subject wasn't exposed at all by the ambient light. The background was so much brighter than the subject that the 1/10th second exposure allowed the background to appear bright and the subject black.
Then, when the flash was turned ON, the subject was exposed entirely (almost) by the flash, while the background was so far behind the subject that the flash made no effect on it. The square law tells us that the flash power decreases exponentially with distance. If the distance from the camera to the subject is say 6 feet, then 6 feet behind the subject the flash power is already down to 1/4th the power. At 24 feet, the flash is down to 1/8th power. In this case, the waterfall was about 48 feet away, meaning the power of the flash was down to 1/16th power, which is insignificant and provided no visible brightening.
In your night portrait where you were using the 1 second exposure with a flash, the motion blur of the subject means that the ambient light was strong enough to significantly expose the subject during the 1 sec shutter. This points out why it is really important to always check the ambient first. To do this, turn the flash OFF and take a test shot at the shutter speed and aperture you plan to use to be sure the ambient light is not significantly exposing your subject. The key word is 'significantly'. If the subject shows very dark in the image, that's OK. There will be no blur when the flash is turned on. Then the flash will provide all the significant exposure on the subject.
Please let me know if that helps,
Russ
thanks for your clear reply, i did the test of dark subject with flash at shutter speed even down to 4 seconds, the photo still turns out to be sharp. the result amazed me a lot,
in my past knowledge, handheld for 4 seconds is unbelievable to be sharp, but the test did.
Russ, you help me a lot and i learn a lot from you.
best regards,
Ho
Ho,
It's really quite amazing isn't it?
I'm glad I could help you!
Russ
I'd believe the key point here is that the subject is in a much darker position compared to the background... I once made a group shot of <10 people in a small private dining room in a restaurant and I was amazed at the power of the flash (SB-800) gave me; all the subjects and the background were correctly exposed -- all from a single flashgun!! :)
Hi Raymond,
The SB-800 is indeed a powerful flash for its size.
However, the darkness doesn't increase the power of the flash. It just keeps the ambient from causing ghosting if the subject (or the camera) happens to be moving.
Also, in a restaurant environment, the flash is usually not used to light the background. The ambient is normally used for that. In fact, you usually try to keep your subject well away from the background, especially walls, to avoid flash shadows.
In a studio, you may place your subject near the background and let the flash illuminate both the subject and the background, but normally you use a separate light for that purpose.
I have shot very large groups with two SB800's. Have you read my blog on that subject?
Russ
Thanks for your tips, Russ! That shot was made in a small room so I bounced the light off the wall and I was quite satisfied with the result; and yes, I have read all your blog articles and learned so much from them; I'll keep revisiting them when I need to refresh my memory. Thanks so much for sharing you in-depth knowledge & experiences on using the Nikon flashguns!!
Hi Raymond,
I'm happy to help! Let me know if there is anything that is not clear.
Russ
Great work!
Hi Ogniancho,
Thanks!
Russ
Thx for your great post!!
I really learn a lot from what you write!!
I really appreaciate what you did!!
After reading your post, I have a question, can you help me?
From your post, I know that the strength of the main flash from the speedlight is determined by using pre-flash, and it only depends on Aperture and ISO, right?
How about this case:
In ambient light
M mode setup 1/30 f/3.5 ISO 800
and still under 2EV
then we need to use flash to let the subject has correct exposure.
What if I set the shutter to 1/60?
Since shutter faster, that mean the subject becomes less bright,(if there is only ambient light)
What TTL will do in this situation?
(1) since ISO, Aperture no change, then TTL no change
(2) Since the subject is dimmer than b4, so the speedlight will shot a brighter flash to compensate the loss in order to achieve a correct exporsure.
Which one is correct?
(in the question, I want to assume the effect of ambient light cannot be neglect)
Thank a lot !!!!!
Bubble Lee
Hi Bubble,
One very important concept to understand is that when using regular flash sync, the entire flash pulse takes place during the time the shutter is open. That means that changing the shutter speed will not affect the amount of flash contribution to the image.
Also, for any of the assumptions to work, you always have to make sure the flash makes a much greater contribution to the exposure of the subject than the ambient does.
Changing the shutter speed will always change the ambient contribution to the image, because that light is constant, and the longer the shutter is open, the more of it will contribute to the exposure.
So, in the case that you described, where you changed the shutter from 1/30th to 1/60th, the flash contribution to the image won't change, but the ambient contribution will increase by one stop.
As long as the ambient is low, the flash will have a much greater impact on the subject than the background. This means that if you change the shutter speed from 1/30th to 1/60th, the increase in brightness of the subject due to the ambient will be very small, and often undetectable. Of course, the brighter the ambient, the more effect the shutter will have on the subject.
The background brightness is the thing that changes the most when you change the shutter, because the flash loses power so quickly that in the background the ambient is the primary contribution and the flash is secondary.
Then you mentioned TTL. All my discussion uses TTL. If you don't use TTL, then the aperture will affect the flash contribution. When TTL is used, changing the aperture doesn't affect the subject (again assuming ambient is negligible), because the flash power changes to compensate.
Lastly, you asked about when the ambient light is bright enough that you cannot neglect it. If this is the case, then you now have a much more difficult situation, and none of the comments I have made above are true. When the ambient light is bright enough to significantly affect the subject, then changes of shutter speed will change the brightness of the subject as well as the background. The background will still be affected more than the subject.
When I run into this situation, I simply increase the flash power to overpower the ambient, so all the assumptions will work again.
This situation normally only causes a problem outdoors in daylight conditions. Then, the daylight is so bright that you cannot increase the flash enough to overpower it, and you have to use a 'fill' flash concept. It is very rare when shooting indoor flash that you cannot increase the flash power sufficiently to overpower the ambient, so that you can once again control the background and subject independently.
Hope that helps,
Russ
Thank for your answer!!!!
Because I am busy these days, I just read your reply today.
I think I understand your answer, and try to do an experiment.
I use TTL, fix aperture and ISO,
and set the shutter to 1/200, let the overall exprosure under 3ev.
Then I increase the speed of my shutter step by step from under 3EV to 0EV. (Each step 1 stop that mean I take 10 photos).
I find that the brightness of the image are nearly the same!
In this case, does it mean the power of the flash is much stronger than ambient light?
OR TTL do sth to adjust the power?
and my last question:
If in the situation that ambient light is too bright, we cannot neglect their effect, you said that we should increase the power of flash. I not sure the meaning. It means:
(1) decrease the shutter speed to let ambient light becomes lesss bright. (then flash is obviously brighter)
(2) increase the output of flash
(then the object over exprosure?)
many and many and many thx!!!!!!
Bubble
Hi again Bubble,
One thing that has not been mentioned: Everything I have written assumes you are using regular flash sync and not High Speed Sync. If you are using High Speed sync, many of my answers would have been different. I recommend you fully understand regular flash sync before trying Auto FP High Speed Sync mode.
Yes, in your experiment the brightness of the subject did not change, because the power of the flash was much stronger than the ambient. You should have seen a change in the background brightness, however, because the shutter affects the ambient portion of the exposure, and the background is usually lit by ambient only.
TTL does not change the power of the flash when the shutter is increased.
Regarding your last question: (1) is correct. Reducing the ambient by increasing the shutter leaves the flash the same while decreasing the ambient, so it 'increases' the percentage of flash on the subject. But you will see the subject getting darker, because of the decreasing ambient. This is what you want, because in TTL mode, the flash doesn't take ambient into account, so it will usually overexpose the subject until you take the ambient away with the shutter.
However, bright ambient conditions is why TTL-BL was invented. This mode will automatically adjust the flash power to balance the brightness of the subject with the background. Whenever I shoot flash in bright ambient situations, like outdoors in daytime, I always switch to TTL-BL.
You never mentioned whether you were using the pop-up flash. I have been assuming you were using an SB600 or SB800 external flash attached to the hot shoe. The pop-up flash always works in TTL-BL mode when Matrix or Center-Weighted metering is selected. It always works in regular TTL if you select Spot metering. Since TTL is usually best indoors, you should select select spot metering for indoor flash when using the pop-up flash.
Russ
"regular flash sync and not High Speed Sync. If you are using High Speed sync, many of my answers would have been different. I recommend you fully understand regular flash sync before trying Auto FP High Speed Sync mode."
I afraid I don't understand what you are talking about...
Any information for me to reference? thx~
Bubble Lee
Bubble,
I don't know which camera you have, but every camera has a shutter speed called the 'Flash Sync Speed'. On my D200 that speed is 1/250th.
There is a choice in the menus to select Auto FP Sync. Don't select it until you understand more about it.
When in normal sync, the camera cannot go above the flash sync speed. Then, all of the things I have told you are true.
High Speed Sync will allow the shutter speed to go above 1/250th and some of the things I told you are no longer always true.
I wrote another blog on High Speed Sync here: http://nikonclspracticalguide.blogspot.com/2008/03/10-auto-fp-high-speed-sync-explained.html
Russ
I don't know how to express my heartfelt appreciation to your help!
I will read all the information and try to understand more about flash~!!
My cam is D80 and I use SB600 usually and sometimes pop-up flash for casual photo.
I have read the blog about built-in flash. Why you are so sure that TTL-BL in matrix and TTL in spot metering? Any hard envidence? or just comes from your experience?
Before I read your blog, I always use pop-up flash together with matrix metering. But I can't find and problem about the brightness on the object. But when I use FV lock, I usually find that the object is too bright. is it related to what your metion about pop-up flash?
Bubble Lee
Hi again Bubble,
Here is a way you can test this yourself:
Camera OFF
Mount SB-600 in hot shoe
Camera and flash ON
Camera in Matrix metering
On the SB-600 select TTL-BL mode
Now, change your camera to spot metering mode and look at the display on the SB-600. It will have changed to regular TTL. TTL-BL is never available when in spot metering.
However, on the SB-600 you also have the option of selecting regular TTL when in Matrix mode, if you want to. This is what I use most of the time for indoor shots.
However, on the pop-up flash, there is no option to select TTL or TTL-BL. It simply defaults to TTL-BL when in matrix metering and TTL when in spot metering. It tells you this in the camera manual.
If you shoot with TTL-BL indoors, it will work most of the time, but some of the time it will underexpose. If you use regular TTL indoors, you never have the underexposure problem.
TTL-BL was designed for bright ambient conditions like outdoors in daylight.
Also, refering back to my previous post, on your D80, the flash sync speed is 1/200th. So, when the camera is in regular flash sync, the highest shutter speed you can select is 1/200th. You can change the sync mode to Auto FP (high speed sync) using menu item 25, but I recommend you not do this until you understand more about your flash and camera.
Russ
I love U man!!
I will recommend all my fds which are interested in taking photo to visit your blog!!
I really learn a lot!!
Bubble Lee
Russ,
Your blog is definitely a standard which Nikon should include in their web site as an official source of reference. You pull so many points together which is what learning is all about, associations and connections, making it easier to retrieve from long – term memory. Great Blog! Keep it flowing... and of course we all look forward to the "book". :)
Hi Felix,
Thank you for the compliments!
As far as a book goes, that sounds way too much like work!
Instead, I think I'll just continue to write articles about particular topics that add to the books that are already out there.
Russ
Dear Russ,
I've discovered your blog just three days ago and I've read it twice (only this chapter...) already. As many guys and girls who bought their camera I've bought the SB-600 as well, but never understood all the functions it offers. You have brighten my life as a beginner photographer.
Thanks a lot!
I have a question, I hope it is not stupid...
When I shoot with TTL BL mode, do I need to point the head of the SB-600 directly to the pace of my object or fire to the ceiling to avoid shadows?
Thanx a lot from Israel.
Yuval,
Thanks for the nice compliment!
When you shoot TTL-BL mode, you can point the flash anywhere you want to. In fact, in any TTL mode the flash power calculation is done based on either reflected power from the subject or the distance to the subject or both. You can always point the flash head anywhere you want to, and the subject will come out exposed the same - as long as you stay within the flash power capabilities. Obviously, if you aim the flash backwards, and none of the light hits the subject, you will run out of flash power and the subject will be dark.
Also, in TTL-BL (and NOT regular TTL) when you point the flash head straight forward, the distance information reported by the lens is partially used to determine the flash power.
However, TTL-BL only works correctly in bright ambient light, like outside during daytime. TTL-BL was designed for adding fill to a shot, not for supplying the primary light.
TTL-BL makes the flash power equal to the ambient brightness. It is great for when the subject is BackLighted (which is where BL came from in the first place).
If you use TTL-BL in low ambient light, like indoors at night, you can get unpredictable results. Often the shot will come out too dark, but it can be highly influenced by specular highlights in the background (like reflective surfaces, windows or lights).
Indoors, in dim ambient light, (or whenever you want the flash to be the primary light) it is always better to use regular TTL. Then, the flash will expose the subject to a 'standard' brightness, without consideration of the ambient light. In regular TTL mode, watch out in bright ambient light. The flash exposure will add to the ambient exposure on the subject, and it will often overexpose the subject. That's when TTL-BL is very useful.
Hope that helps!
Russ
Russ, just found your blog today and it trigger me enough to start using my SB600 again.
Thanks for your effort to put this material together.
Jan
Hey Jan,
Glad you find my work useful!
Thanks!
Russ
Thank you so much for this write up. But I don't thank you for the fact I have been playing with my camera and flash for 45 minutes instead of going to bed because you gave me so much useful information!!!!
So many things to try tomorrow...gnight!
To Anonymous,
Thanks for the nice feedback!
Now get some sleep! :)
Russ
Hallo Rus, You say "If the ambient is extremely bright, like direct sunlight, then it's usually best to select P or S mode (and TTL-BL),"
Why P or S and why not MANUAL?
Usually is always Manual metering your choice.
gr. Kati
Hi again Kati,
Manual mode will work just fine if you have the time.
It takes quite a bit more time than any of the auto modes to get your camera set right. Especially when shooting quick grab-shots of moving people in bright light.
My comments in this blog are about how to shoot fill without ending up with unexpected overexposure due to the shutter being limited to the flash sync speed (1/250th).
If you are shooting in camera A mode, indoors, in dim ambient light, and you move outside into the daylight and keep shooting moving people all the way, you have to remember to switch to some mode that will allow the aperture to stop down, so the 1/250th limit won't get you. Manual will allow this, but it is slow and you will miss lots of great shots fiddling with your aperture and shutter.
P mode solves this problem very nicely.
I don't know a single wedding photographer who would make the transition from the church to the outside, following the B&G, using camera Manual mode. It just slows you down too much.
Russ
Hi Russ,
thanks a lot for explaining the working of the different options of our Nikon flashes. It was more understandable than the normal userdocumentation of Nikon. Maybe they can hire you ;-).
I've taken a lot of testshots but I'm left with some question. Within a week we have a wedding of friends and they asked if I could take some pictures of their evening-dinner. Normally I like pictures where the ambient light is also captured somehow. Before my present camera (Nikon D60 + SB600) I usually took pictures without the flash (with flash persons were correctly illuminated, but the background was dark or you really saw at the picture that is was taken with flash (very white and looking "cold" that way). Off course it resulted in many blurry pictures of the guests (I do not like really "posed" pictures so the people are talking, moving their heads, arms etc).
So please, could you maybe give me a hint which parameters I could use to take nice sharp pictures without ruining the normal ambient light in the dinner-room by overexpose it or underexpose it?
Thank you very much in advance.
Erik (Belgium)
Hi Erik,
My usual settings for flash shots at a reception are 1/80th shutter, f/3.5 - f/5.6 (depending on depth of field needed), and ISO 400. Then, I set the flash in TTL mode at -0.7 ev (or so). The actual setting on the flash depends a lot on your particular camera and the brightness of the ambient. You have to experiment with this and figure out what the correct flash setting should be.
In normal reception my settings will make the background somewhat dark, but still with lots of detail.
The more ambient light you allow into your pictures, the more difficult it becomes to avoid overexposure on the subject. Remember that the flash system sets its power assuming that there is zero ambient lighting the subject. Therefore, if you slow the shutter ('drag the shutter' or use 'slow sync') to allow lots of ambient, you have to also turn down the power of the flash even farther.
Using f/5.6 also darkens the background significantly, so most of my shots are at f/3.5. I sometimes use f/2.8, but that makes the depth of field so narrow it is hard to keep even a single subject fully sharp.
Hope that helps,
Russ
Great blog!
Great blog! Thanks :)
There is nothing mentioned about the setting for the metering. The BL doesn't work when the camera is set to spot or center metering. How do you set up the camera indoors?
Hi Von,
TTL-BL works in both Matrix and Center-Weighted metering. However, it works best in Matrix metering.
I have discussed this in several of the Q&A's after the blogs. I probably should update the blogs themselves to include this.
Indoors the camera should be set to regular TTL and Manual mode. I wrote about this in several of my blogs.
Russ
Russ:
A general question about the speedlites.
In ALL the articles and videos I've seen so far about portrait lighting, the photographer ALWAYS uses the studio lites.
CAN you use, say 2 or 3 speedlites instead of the studio lites?
I thought of adding 2 SB-600s to my SB-900, and putting Gary Phong LS-IIs on all 3.
What do you think of that for 3-point portrait lighting?
Thanks for all the great information....
Rick Hollingsworth
Russ:
An observation about using ND filters to reduce DOF in low light.
One of you subscribers (and you) mentioned that there is not enought time doing a wedding to "put on" an ND filter.
I came across this idea the other day.
Instead of taking the time to screw on an ND filter, my firend just carries a couple of 4x4" Conkin type ND filters. When he needs one, he just pulls it out of his picket, sticks it infront of the lens, and fires away.
Then, just stick it back and keep on shooting.
Just an idea....
Rick Hollingsworth
Hi Rick,
I am actually working on a new blog discussing this very point.
Yes, you can use speedlights in the studio. In fact, that's exactly what I use in my own studio!
I have used studio lights in the past, and the only advantage they have over speedlights is power. However, high power is not usually required in the studio, and you can work much more quickly (lots more poses), because you can set the power on all the Remotes from the Commander without the need for a light meter.
I typically set my key and fill speedlight to the right and left of the camera in umbrellas, and about half the time, a third speedlight with a snoot as a hair light. This uses up all the groups that are available in the Nikon wireless CLS system.
I use commander TTL for the key and fill lights and commander manual for the hair light. This makes it very easy to set a desired lighting ratio and bring a touch of hair light to taste.
However, you must also realize that the power ratio of the two lights is not the same as the lighting ratio, since they add where they overlap, but that is a whole other subject.
Then, I sometimes use a continuous lamp as a background light with a daylight bulb to match the speedlights.
You also asked about using a Gary Fong Light Sphere on each flash. I wouldn't do that. I recommend using a diffuser on the Commander in order to scatter the command pulses in all directions giving better wireless operation, but umbrellas work much better than the LS on the Remotes.
Hope that helps,
Russ
Russ:
Thanks, good info. Too much scattering from the LS-IIs? Since one seems to work so well, thought 2 or 3 might also work well. Guess not.
Thanks for the insight.
Rick
Hi again Rick,
No, it's not that there is too much scattering from the LS's.
The reason is that most studios are painted black, or at least are dark colored, to reduce bouncing, which makes it possible to have exact control of the light on the subject. If you are bouncing, you have limited control of the lighting ratio.
So, when shooting in the studio, you want minimum bouncing and soft controlled light at the same time. That is usually done with umbrellas or soft boxes. Then, you can set specific lighting ratios and make truly professional portraits.
Russ
Consequently, FSS cannot be set to less than 1/60th (on my D200). You can set higher, but not lower.
Russ:
On my D80, the selections for FSS go from 1/60 DOWN to 30s. Am I reading this right? Mine seems to go DOWN from 1/60th, NOT up???
Huh??
Rick
Rick,
There are two shutter speed limits related to flash. The Flash Shutter Speed is the LOWEST speed the shutter can go to, and the Flash Sync Speed is the HIGHEST speed the shutter can go to.
The Flash Shutter Speed is normally set at 1/60th and is usually in play indoors in low ambient light. The purpose of the Flash Shutter Speed is to keep the background from showing motion blur when handholding.
The Flash Sync Speed is 1/250th on the D200. This is the maximum shutter speed that the flash can sync with. This speed limit is reached most often when outdoors in bright ambient light shooting fill flash. This speed limit can be set lower in the D200 menu but most people leave it at 1/250th. In fact, I have never found any reason to ever set it lower.
Hope that helps,
Russ
Hi, Russ
So you're working on a topic for using Speedlights in the studio?
Now that I can't wait to read!
With your experience and brilliant content on your other 15 topics, this new one can't help but be a winner!
When d'you think it'll be published?
Kind regards
John
Russ:
Let me just cut to the chase....
We just got back a few weeks ago from a vacation at WDW in Orlando.
We stayed at the Grand Floridian, and booked a portrait sitting with the Disney photographer there at the hotel.
The photographer shot about 30 pics, both inside and outside of the hotel.
On ALL shots, he used a D40, 70-200 f/2.8 VR, SB-800, and the GP LS-II (Cloud - with dome)
ALL of his shots came out perfect - good exposure of us AND the soft focus background. Very nice.
Since then, I have tried (in vein) to reproduce those shots at home.
Now, for me....I have the D80, 70-300 VR, SB-600, and the same LS-II as he used.
I TRY to shoot manual, when possible, because everyone on the net says you need to do that....no other reason.
Yesterday, I took about 30 shots of my daughter - outside - golden hour - sun over my back - with the LS-II.
No matter where I set the camera and/or flash, the pics all came out bad. Either she was overexposed and the BG was fine, or, she was fine and the BG was dark.
Really frustrating!
So, if you were using my gear, shooting her in those conditions, how would you do it?
Sorry for the long post, but had to describe my technique as best I can.
Thanks again,
Rick Hollingsworth
Rick,
There are lots of variables. Don't listen to people who say you have to shoot manual. Manual is right for some flash shots, but it makes others much more difficult. You should use the camera mode that makes the most sense for the situation.
Before you can even think about the camera mode, you have to answer two critical questions: 1) Will the flash be Primary or Fill? and 2) Should you use FP Sync or regular sync?
If you don't know what I am talking about then you need to read my blogs - all of them. I explain what all these things are and how to set the camera to use them.
After that, you can decide whether to shoot in camera manual mode or one of the automatic modes.
Just as a point of reference, I shoot professionally, and I use all camera modes, (A, S, P, and M). It all depends on the situation.
Once you understand the details in my blogs, you will be able to take perfectly exposed pictures just like the Disney Photog.
If you will send me an email, I will be able to give much more information to you. I don't like to use the Q&A area of my blogs for lengthy discussions.
Email follow-up comments to russ@russmacdonaldphotos.com.
Russ
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