On Feb 11, 2006, at 10:30 AM, Jostein wrote:
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...:-)
Krrrrrrrrraaaaaakk! Watch out! The ice is breaking and the water is cold!!
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.
You have that backwards. More CA is tolerable in a MF lens, because the final image is enlarged less.
It has been a matter of pride with designers of MF lenses in Germany to make them better than they needed to be. The Japanese wanted theirs to be as good, so they followed the example.
Bob
