Boris Liberman wrote: > On slightly different matter, I am surprised to see that DA* 55/1.4 > weighs just a hair below 400 grams with filter diameter of whopping 58 > mm. This is very big chunk of glass, much like just announced Nikon > 50/1.4G lens. I wonder why? At least Nikon covers full frame, and DA* > 55 doesn't necessarily have to. > >
There are probably good reasons for the size of the DA55. My guess, trying to get the exit pupil as large as possible. Tele-centricity is good to avoid hairy CA problems, a path that Sigma have also followed with their 50/1.4. Plus, SDM doesn't come free. There needs to be some room in there to accommodate the drive. D -- [EMAIL PROTECTED] http://members.iinet.net.au/~derbyc -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
