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Author Topic: Canon 1DX - high ISO and step aperture  (Read 1333 times)

mmoon

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Canon 1DX - high ISO and step aperture
« on: August 04, 2012, 03:17:01 PM »
Why at high ISO the step of a aperture of the camera changes?

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Canon 1DX - high ISO and step aperture
« on: August 04, 2012, 03:17:01 PM »

neuroanatomist

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Re: Canon 1DX - high ISO and step aperture
« Reply #1 on: August 04, 2012, 09:58:10 PM »
Aperture is set in 1/3-stop 'steps' (default, can be changed in C.Fns) regardless of ISO.  Of course, at the expanded ISOs (50, 102400, 204800) are full-stop increments below/above the native range, so in an auto aperture mode (P, Tv), setting ISOs in the expanded range means full-stop aperture changes instead of 1/3-stop.

Not sure if that's what you mean. Can you explain a bit more what you mean?
EOS 1D X, EOS M, and lots of lenses
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Re: Canon 1DX - high ISO and step aperture
« Reply #1 on: August 04, 2012, 09:58:10 PM »