Accurately comparing FF vs APS-C sensor performance? An open discussion.

Started Apr 8, 2013 | Discussions thread
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Klipsen Veteran Member • Posts: 6,144
How about this?

On IF lenses, focusing is not done by extending the lens, but rather by changing the focal length of the lens. This is another thing you have to take into consideration - and no DoF calculator does.

My Minolta 200 mm macro has a focal length of only 105 mm at the 1:1 setting, but I know the magnification, so I can still calculate the DoF. Do you have a DoF calcultor that does this? If not, then, by your logic, all results from your DoF calculators are equally wrong ... and therefore equally right.

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Ceterum censeo soleam calidam ISO esse delendam.

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