On 6 Jun 2001, at 14:14, P�l Jensen wrote:
> But the point in this debate is that when using a MF lens on a 35mm camera you
> will actually decrease the resolution of the lens practically speaking. An MF
> lens will perform worse on a 35mm camera than on a MF camera. The resolution of
> the lens will of course be the same on the 35mm negative/positive as on a 24X36
> area on the MF negative/positive. However, this is not how you (normally) use
> lenses. When the lens is used on a 35mm camera the image need to be magnified
> much more than similar image on a MF negative/positive. Not only does this means
> larger grain due to magnifications of the film but it also means magnifications
> of the optical defects of the lens.
Hi P�l,
Sorry for my late reply, (I have actually been out making photographs :-).
The absolute resolving power and minimal distortions available in some of the
new generation medium format lenses (in particular the Mamiya 7 RF lenses)
render them no less capable than the current prime lenses from Leica or
Pentax (given optimum exposure conditions).
Therefore using the centre of the image from one of these lenses should
result in no less resolution (and it doesn't, by my most critical observations
ie 40x magnification). The fact is that MF lenses cover a wider field of view
and project a larger image circle for the same FL, there is no additional
magnification over 35mm, just a larger angle of acceptance for any given MF
FL.
Cheers,
Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT) +10 Hours
[EMAIL PROTECTED]
http://www.ozemail.com.au/~distudio/publications.html
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