Live View Exposure Accuracy with 5D Mark III

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Legion6789

Active member
I've noticed that the live view on the 5d mark iii isn't very accurate... at all. At first I had exposure simulation on but that showed everything as extremely underexposed, to the point of being a completely black screen. I disabled it and now the discrepancy is much less, however it shows everything as being overexposed. Is there some setting to make live view accurate? I'm struggling to understand what technical reason there could be to make live view that inaccurate.
 
It really depend on the brightness you have set for the LCD display as well. In a concert hall pitch dark environment, you better set the brightness to the lowest, while in bright sunlight condition you need to set it to the brightest( may still not be enough) is more of a perception. I prefer to have the exposure simulation on.
In your case it might be really under expose or brightness of the screen do not match the ambient.
 
cookinghusband said:
It really depend on the brightness you have set for the LCD display
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^ That. I found that I had to lower LCD brightness when using a loupe, otherwise I would constantly underexpose. Same with every other camera, really: they're set for viewing in sunlight!
 
I think the only way you can use the LCD for visual exposure is to have a loupe attached and calibrate it to your liking. I never take the loupe off when shooting video as LCDs are very affected by ambient light levels. The loupe will keep the ambient constant. Now it would be great if Canon could have given us more gradiations in the brightness setup...
 
I just don't understand why they can't show you the proper exposure. The LCD is capable of displaying it, cause after I've taken the picture I can see how it exposed. Why can't it show me that before I hit the shutter?
 
I do not know. Maybe the non-Canon lens is not sending info that the camera body needs? Do you have the same issue with Canon lenses?
 
I do not think the histogram is the best tool for judging correct exposure. It shows more of a description of where the pixels are reading the light, but not necessarily if a portion is too bright or too dark. Only on the ends.
 
Bassman2003 said:
I do not think the histogram is the best tool for judging correct exposure. It shows more of a description of where the pixels are reading the light, but not necessarily if a portion is too bright or too dark. Only on the ends.
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Unless you learn to 'map' which bit is what

like understanding a WFM but the 5d3 does not have one of them built in..

S
 
Legion6789 said:
I just don't understand why they can't show you the proper exposure. The LCD is capable of displaying it, cause after I've taken the picture I can see how it exposed. Why can't it show me that before I hit the shutter?
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If you are taking PICTURES (not video) there is a bug where manual lenses (which have no electronics) are improperly shown exposure in the LCD. You can fix this by taking pictures in movie mode.

This bug happens when you have an electronic lens, you have it set to for example f4. Then you change to a manual no-electronics lens and it is already at f1.4. The exposure simulation will be haywiring.

Samuel H is the only who got it right!
 
maarek said:
Samuel H is the only who got it right!
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Haha, second time I read something like that in these forums in about a week! So, get forum cred, checked. Next step: learn how to be an actual filmmaker. Then, world domination. Or something. :)
 
That was exactly the point of my question.
This feature really bothered me a lot initially.
You have to have at least one fast Canon lens (get a 50mm f1.8).
Set it to f1.8 before taking off and putting your OM lenses on the camera.
Now exposure in live view should be fine.


Samuel H said:
Wait, you see different exposure while shooting and while reviewing the footage? That's a different issue!
Since you're using manual lenses, have you checked this? http://www.dvxuser.com/V6/showthrea...-550D-when-using-vintage-manual-lenses-SOLVED
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