On Thu, 14 Jul 2005, Dario Bonazza wrote:

2) Circle of confusion (COC=a lens design parameter, different for different

<snip>

For this reason, a 50mm lens used on APS format should show less DOF than a
75mm on 35mm format (provided that both lenses are designed for 35mm and are
set on the same relative aperture).

Should that be "on the same absolute aperture"?

Many thanks for taking the time to write this. It's nice to have you (back) on the list.

Kostas

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