On 4 Jun 2001, at 0:31, P�l Jensen wrote:
> Todd wrote:
>
> > It should perform quite well, as you are just using the center of the image
> > produced by the lens, which is where most lenses perorm best.
>
> They still show visible light fall-off at the corners at wide apertures. Also,
> when used on on 35mm format all optical defects will be trippled for a certain
> magnification. In addition, MF lenses are apparently harder to design well.
> You'll see that almost all MF lenses have lower MTF values than comparable
> lenses for the 35mm format. Even a Carl Zeiss Macro lens for the Hasselblad is
> pretty average by 35mm standards.
Hi P�l,
My relative tests of 35mm vs MF Pentax lenses showed that the difference
was negligible in all but the most demanding situations, also I noted no
vignetting in the corners of the 35mm frame when using MF lenses. The
distortion (colour and geometric) was very good right to the edges of the
frame also.
http://www.ozemail.com.au/~distudio/pentaxmfvs35mmlenstest.html
There is no truth in the statement the MF lenses have lower MTF values
either, just check the Photodo tests for the Mamiya 7 lenses, I have the 43,
80 and 150 and can say that they are pretty damn good irrespective of the
format.
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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