Chuck Castleton 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?
>
> Chuck
>
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Well in the dark ages (70's) canon had a 50mm that had an apeture of .95
but it was for their 7s rangefinder camera only and if I remember right
alpa had a f/1.9 lense.
yours trying to remember 'the good old days'
Garry
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