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FORUMS Photography Talk by Genre Weddings & Other Family Events Talk 
Thread started 25 Nov 2009 (Wednesday) 16:43
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How high of FEC do you use when the bride is in the picture?

 
psxindo
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Nov 25, 2009 16:43 |  #1

My equipment
5DII + 17-40 + 580exII

settings:
60 f4 1600

during indoor reception where the bride is in the picture, I would need to go as high as +2 FEC, flash bounced at an angle with white card pulled up. Is this normal?

Room varies. Sometimes white ceiling, off white, ivory, brownish, etc. Ceiling could go from 12ft to 20ft. But still with the bride in the picture, I usually need to go as high as +2 FEC.

Thanks


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tim
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Nov 25, 2009 17:25 |  #2

FEC shouldn't vary significantly when light changes, but changes in what's in the frame will change it. I use anywhere between 0 if the bride's in the frame with guys in dark suits, to +2 or even a bit more if it's just the dress. The 7D does FEC+3 which is handy at times.

Just trust your histogram.


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bric-a-brac
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Nov 25, 2009 17:40 |  #3

adding to what Tim said, your metering mode will also create different outcomes from your FEC setting. for instance, FEC +1 or +2 with spot metering will probably get you a well exposed wedding dress if you metered off the dress, but the next photograph could be blown out if you focus on a fellow in a black tux without thinking about it.


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tim
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Nov 25, 2009 17:46 |  #4

Does flash exposure pay attention to the metering mode? I have no idea.


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bric-a-brac
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Nov 25, 2009 18:15 |  #5

tim wrote in post #9082384 (external link)
Does flash exposure pay attention to the metering mode? I have no idea.

in ettl, isn't the flash output based on the camera's evaluation of the scene?


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tim
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Nov 25, 2009 18:40 |  #6

bric-a-brac wrote in post #9082513 (external link)
in ettl, isn't the flash output based on the camera's evaluation of the scene?

Yes, but I assumed it metered for the whole scene, not spot/partial if that's selected.


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bric-a-brac
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Nov 25, 2009 18:47 |  #7

tim wrote in post #9082635 (external link)
Yes, but I assumed it metered for the whole scene, not spot/partial if that's selected.

an opportunity to learn! I always assumed that everything was working off of the same meter according to the parameters set by the user.

time to get a whiskey and wait for someone smarter than me to come along with the answer. :D


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tim
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Nov 25, 2009 18:54 |  #8

I found this (external link).

The camera uses its evaluative metering system to meter the flash output, based upon the preflash. When in autofocus mode most EOS bodies which do not use E-TTL II bias flash metering toward the currently selected AF point, but always in an evaluative mode pattern - they don’t use spot or partial metering patterns. When in manual focus mode it appears that at least some EOS bodies switch to centre-weighted averaging.


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RT ­ McAllister
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Nov 25, 2009 19:04 |  #9

most EOS bodies which do not use E-TTL II bias flash metering toward the currently selected AF point, but always in an evaluative mode pattern - they don’t use spot or partial metering patterns.

It looks like this applies to only older EOS units though.

I too always thought flash metering was still based on err... well, whatever metering mode you were in.




  
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tim
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Nov 25, 2009 19:08 |  #10

Might be an interesting experiment to try. For someone else to try, rather than me, I always have my cameras set up the same way and I understand how they work, so I don't want to mess with them!


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Gatorboy
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Nov 26, 2009 11:11 |  #11

psxindo wrote in post #9082058 (external link)
during indoor reception where the bride is in the picture, I would need to go as high as +2 FEC, flash bounced at an angle with white card pulled up. Is this normal?

Yes. The camera wants to expose for middle gray, so with a white dress, the camera will try to bring that down to gray. Hence having to bump up the FEC. Typically +0.7 to +1.0 should do the trick. Alternatively, with a black suit, the opposite must be done. The camera wants to make black into gray, so to offset that, turn your FEC down to -0.7 when shooting groomsmen.


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Big ­ Mike
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Nov 26, 2009 13:34 |  #12

I thought I read somewhere that flash metering was centre weighted by default...and that maybe there was a custom function to change it to evaluative.


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Shooting
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Nov 29, 2009 15:16 as a reply to  @ Big Mike's post |  #13

I usually bounce and when I do I never use a more than +1 FEC on my 580ex II.




  
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czeglin
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Nov 29, 2009 16:58 |  #14

I use +2/3 FEC on my 580EX II just to get normal scenes to look right. With a wedding dress I would expect even more.


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How high of FEC do you use when the bride is in the picture?
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