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>Bob Neuman (d_ruether@hotmail.com) wrote:
>: .........Briefly, the PC showed about equal center performance
>: and better corner performance than the Leitz at f2.8 and infinity.
>: At f5.6, the Leitz showed slightly better center performance, though
>: the Nikkor PC had better corners. The 35-105mm Nikkor at 35mm and
>: infinity had better corner performance than the f1.4's throughout,
>: though the rest of the frame lagged slightly behind.)
>(much deletia).
>Well this somewhat demonstrates that PC lenses make excellent
>wide open lenses unshifted. By definition they have to have
>virtually no falloff or drop in MTF or distortion _unshifted_.
>I'd carry one around had it not been for the lack of automatic
>diaphragm and possibly lack of floating elements.
>Bob/Dave, you didn't mention distortion. How do they _all_
>compare?
I did not check the Leitz for linear distortion, but would guess
that it is low (BTW, that Leitz 35mm f1.4 double-aspheric is no
longer available, and its performance is probably at least slightly
different from the current aspheric 35mm). The Nikkor 35's all do
have a moderate amount of linear distortion, including the PC lens.
The surprise in the group is the (albeit selected) 35-105mm MF
Nikkor, which has very fine corner performance (not typical for
this lens, which has more variation from sample to sample than
most Nikkors).
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