A 645 original is 2.5 times the size of a 35mm original. So I suppose
that any COF that is less than 2.5 times as large in a 645 optic will
make a print of a given size look sharper than a corresponding print
made from a 35mm optic. But I'm on thin ice here...:-)
I would suspect that other factors may influence the apparent
sharpness as well, such as chromatic aberrations. I imagine that a 645
lens would have to be better CA corrected than a corresponding 35mm
lens.
Jostein
----- Original Message -----
From: "Jens Bladt" <[EMAIL PROTECTED]>
To: <pentax-discuss@pdml.net>
Sent: Saturday, February 11, 2006 2:26 PM
Subject: RE: Lenses for 645D?
Jostein.
I guess that's what I meant. COF is defined according to the wanted
englargement. So, a plausible COF should not be the same for MF and
35mm. Or
should it?
Jens Bladt
http://www.jensbladt.dk
