Yuri wrote:

I agree on the size/weight and diameter points. Introduction of AF
have contributed to the size and influenced the optical design -- not
necessarily to the better..

I wonder how Pentax manages to keep producing fine glass without
increasing diameter.
It's a pleasure to use old Tacumars, Zuikos and Nikkors. One can buy a
35/1.4 Nikkor with a F100 body cheaper than EF 35L

Best, Y

I wonder ifthe increased diameter is due to the mechanics of auto focus ?????

What drives a Pentax af lens?

Bob


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