atsi Offline Upload & Sell: Off
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I have had my 7D for a couple of weeks and am generally happy with it. I just discovered today that it has one perplexing limitation.
It will shoot at 8FPS quite nicely until you get below a certain amount of ambient light. Not exposure, but ambient light. I am sure this also relates to maximum aperture of the lens too. As soon as the light falls below the equivalent of 3200ISO, 1/100 and f2.8, the frame rate drops. This happens in normal view. If the camera is set to live view and continuous shots are taken it stays steady no matter what the ambient light is. This tested in manual mode where the camera has to do no thinking.
I am quite surprised by this as my 40D and my 20D do not exhibit this behavior. They both hold on to their maximum frame rate no matter what the light. Yes, I have disabled all the auto processing in the 7D, and yes I have gone over every setting to make sure there isn't anything to interfere.
So I went looking and sure enough, page 93 of the manual, last footnote:
"In low-light areas or indoors, the continuous shooting speed may become slower even if a fast shutter speed is set."
I can't think why this needs to be so.
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