hi Paul,
the 1.5/75 CZJ is Sonnar design, made originally for Exakta. Quite a good
lens, esp. stopped down. Unfortunately single-coated
AFIK. It should come close or beat the SMC Tak (at least the older, 1.9 Tessar/Sonnar
design, sure), I think <g>.
The other one, 1.8/80 CZJ Pancolar, is a gaussian design, propably very
similar or same as Planar design. I do have this lens, and
while the Multicoating on my sample is not as good as modern SMC (needs a lens hood
still <g>), in normal light it is about as sharp as my
SMC F 1.4/50 or just slightly less (at relatively same apertures - 1.4=1.8; 5.6=5.6).
It's good wide open, and excellent even moderately
stopped down. It should be as sharp or even better <g> than all the portrait 80mm'
Pentax made (xcept the new ones, A & FA 1.4/85 of
course). AFAIK it's same or very similar design to Pentax SMC-K 1.8/85 (most those
1.8/80 lenses are of same, planar-derived design). Only
drawback my sample is prone to flare from strong light sources :(
Frantisek
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