Chuck wrote:
>If this is too far OT, slap me. I'm curious about the design issues in
>
>producing a large aperture lens. Is it "just" a matter of maximizing
>the
>diameter of the light path and removing any obstructions? Does
>increasing
>the diameter of the front element lead to a lower f number? Do the
>laws of
>optics rule out a lens with an aperture larger than f/1.0, or is it at
>least
>theoretically possible to build a 50 mm lens with a 100 mm filter ring
>and
>gather enough light to get to f/0.8 or something?
Before Canon gave up making its version of the Leica M3 it produced an F
0.95 lens.
Winsor
Winsor Crosby
Long Beach, California, USA
mailto:wincros@xxxxxxxxxxx
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|