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SportsShooter.com: Member Message Board

5D3 & 1Dx different exposures
Monty Rand, Photographer
Bangor | ME | USA | Posted: 2:02 PM on 02.16.13
->> OK, I have a 1Dx and my buddy a 5D3. Were at the hockey rink and I'm shooting ISO6400 1/500 F2.8. He's shooting ISO 5000 1/800 F2.8 and the files both look the same. Roughly a stop difference. Why is that? I want 1 more stop of light like he's getting......haha
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Peter Buehner, Photographer
Orono | ME | USA | Posted: 2:27 PM on 02.16.13
->> Is that lens eating up light somehow? I was actually at ISO 3200 1/1000 and F2.8.
If you look at some of my files in that last bunch I put out Monty, I bumped the dial and shot at 1/200 for a couple of jube shots. My typical settings are ISO 1600 at F2 and 1/800-1/1000 or I up the ISO to 3200 to get to 2.8
I don't know why you would be off by almost 2 stops. Are you recovering a lot of highlights in post?
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Ting Shen, Student/Intern, Photographer
Chicago | IL | U.S. | Posted: 2:42 PM on 02.16.13
->> one stop difference?
What lenses you using on the two bodies?

Remember all lenses even though they are marked with the same aperture, but the transmission aint going to be the same, the actually exposure is usually like 1/2 to 2/3 darker cause of the loss of light when traveling through the lens. (thats why you see cinema lenses are all marked with T values to ensure even exposure across scenes when filming)

For example: every's beloved 24-105F4LIS it's actual T value is around 5 instead of the F4. (thats why I hate that lens despite of everything else)

Even the OLD BRICK 24-70ƒ/2.8L is a T value of 3.5. As for the New 24-70ƒ2.8L II is a T value of 3, which is an big improvement from the old guy.

The 70-200F2.8LIS/II both are rated around a T3.5. so yeah.
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Will Powers, Photographer
Denver | CO | USA | Posted: 2:50 PM on 02.16.13
->> Monty, isn' tat really pretty close exposure values? Looks like your your ISO is 1/3 of a stop or so faster but your shutter speed is is slower by 1/3 of a stop (one five hundred would be allowing more light than 1/800).
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Will Powers, Photographer
Denver | CO | USA | Posted: 2:53 PM on 02.16.13
->> Oops my bad, you're correct
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Monty Rand, Photographer
Bangor | ME | USA | Posted: 4:00 PM on 02.16.13
->> Hey Peter, I wasn't referring to you, but when I shoot at Sawyer. My buddy shoots there alot and we happened to be there at the same time and were comparing stuff. I noticed the difference in exposure and thought it was weird.
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Monty Rand, Photographer
Bangor | ME | USA | Posted: 8:17 AM on 02.18.13
->> Thanks Ting for explanation.
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Luke Trottier, Photographer
Bath | ME | US | Posted: 4:44 PM on 02.26.13
->> Monty. Yes, The 1DX appears to be about 1/3-1/2 stop darker then the 5D3. The 5D3 seems to have similar ISO performance to the 1DX once you adjust for exposures.

Once they open the new civic center in Bangor you won't need anything over 1600iso any... :) Shooting my last event in the Bangor Civic center in a few weeks. Won't miss that building.
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Thread Title: 5D3 & 1Dx different exposures
Thread Started By: Monty Rand
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