Re: couple of pictures

--- Pam Niedermayer <pam_pine@cape.com> wrote:
> How spherical would the film plane have to be to get to sharp edges?
> Let's say I'm building an 8x10 pinhole camera (which I am), and wanted
> to build a special curved film holder. Should the spere be around the
> distance from pinhole to film center, the pinhole being the center of
> the sphere?

Imagine tying a string on the pinhole, then swiping it along the film plane.
That is the curvature you want to use if you want to distort the film plane so
that there is a constant "focal length."

Cheers -

george

=====
Handmade Photographic Images
http://members.home.net/hmpi/

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Received on Tue Feb 27 16:18:22 2001