[pure-silver] Re: <somewhat OT> New lens design technology
- From: "Peter Badcock" <peter.badcock@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Fri, 2 Feb 2007 11:05:09 +1100
On 02/02/07, Sauerwald Mark <mark_sauerwald@xxxxxxxxx> wrote:
......... I believe that because
of the way the lens is formed, it would be possible to
make lenses with speeds faster than f1.
Isn't the "light gathering power" of a lens proportional to the surface area
of the input aperture? If so then such a lens design will have much less
light gathering power compared to a conventional lens (assembly) of the same
diameter.
regards
Peter
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