f stop and crop sensors

Started May 11, 2010 | Discussions thread
mike703 Veteran Member • Posts: 6,702
Re: f stop and crop sensors

joseph costa wrote:

don't think so. an f/4 is an f/4 no matter what camera it is on. that's is the opening in the lens diaphragm. now will the cropped sensor also affect your dof, yes.

Correct. the intensity of light coming through the lens is the same, even if you stick a smaller sensor behind it: f/4 is still f/4. There is a change in the field of view, as you know, but not the exposure. Don;t worry about it.

best wishes
--
Mike

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Bob
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