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

Started Jul 27, 2014 | Discussions thread
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Thomas KP Lee
Thomas KP Lee Regular Member • Posts: 230
1DX got different exposure results between photo mode and video mode

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 tube, 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
Sony Cyber-shot DSC-RX10 II Canon EOS-1D Mark IV Canon EOS-1D X Sony SLT-A99 Canon EOS 70D +7 more
Canon EOS-1D
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