Yoshihiko Takinami <[EMAIL PROTECTED]> wrote:
-----------------------------------------
At 5 Feb 2001 08:56:50 -0800 (PST),
Alexander Krohe <[EMAIL PROTECTED]> wrote;
> The 15mm/3.5, the 18mm/3.5 and the 28mm/2 (K-series)
> designs are (almost) identical to those of the
> corresponding Zeiss/Contax lenses. I think, however,
> most Pentax lenses are original designs.
It seems well known that 15/3.5, 28/2, and 45-125/4
were
the major results of co-working with Zeiss in early
70's.
---------------------------------
Hi Yoshihiko,
thanks for the information. From a book that I have,
which shows all Contax/Zeiss lens designs, also the
design of the 18/4 Distagon appears to be identical to
the design of the SMC 18/3.5 (except that the Distagon
has floating elements to improve image quality at
close distances).
This is nowhere documented, but I guess the SMC 18/3.5
might have an aspherical element (I have this lens and
I can't see noticable coma wings around light sources
at the image corners shot wide open, which I think is
quite remakable for such a lens). Do you know
something about that?
best wishes,
Alexander
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