1DX got different exposure results between photo mode and video mode

Started 5 months ago | Discussions thread
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Thomas KP Lee
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1DX got different exposure results between photo mode and video mode
5 months ago

I have been using 1Dx for over one year now, just found one issue, when shooting photos at video mode, the exposure result is quite different than in photo mode. At "A" mode (fixed aperture and fixed ISO) I had tried all three exposure modes ( except Point) for the same scenery view ( using tripod) and compare to exposure in the video mode,  the exposure time in video mode is longer by some 1 step. Anybody know why?

In fact, just found that the 1DX video mode can AF up to a very small aperture, I was using EF600 f4  IS II, + Canon 2x extender + Kenko 2X entender + 20mm extender tubeļ¼Œ with effective focal length of over 3000mm, it can still AF (slowly, so need to manually turn the focus ring to speed it up). Also using video mode, it will minimize the shutter vibrations which is very significant in such focal length.

For using Photo mode, 1DX can only allow to do AF on EF 600 f4 IS II + Canon 2X extender, which added up max aperture to f8.

 Thomas KP Lee's gear list:Thomas KP Lee's gear list
Canon EOS-1D Mark IV Canon EOS-1D X Sony SLT-A99 Canon EOS 70D Sony Alpha 7R +3 more
Canon EOS-1D
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