On 14 Jun 2002 at 15:06, Paul F. Stregevsky wrote: > Now to the 135mm contest: Pentax 135/1.8 vs. Vivitar Series 1 135/2.3. > Somehow, all my collected comments on the Pentax have been erased. The > comments I've collected about the Vivitar state that it's sharp at all > apertures. The Pentax, as I recall, must be stopped down a bit to become > truly sharp. Not surprising, since it's about two-thirds stop faster but > only 5mm wider in filter size. I was drawing an inference that it "can't" > be sharper than the Vivitar.
Paul, You'd be wise not to draw solid conclusions on lens performance based on throw away comments by third party users or filter size. As you know I have the SMCPA*135/1.8 and I also had Contax equipment CZ135f2AE and CZ135f2.8MM. You can look up the CZ site and view the superb MTF diagrams for the 135f2.8 (the 135f2 I can send you) however more practically I can tell you that I tested these three lenses under controlled conditions (one film K25, ML, solid tripod, 40x mag etc). I found that the Pentax was better WRT flare resistance and absolute resolution at any aperture, I still own the Pentax lens and the CZ are long gone. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications.html - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
