"Bill Funk" wrote in message
...
On Tue, 13 Mar 2007 02:41:01 GMT, King Sardon
wrote:

I'm considering building a camera obscura to project prints. The
prints would have a max. dimension of 20 inches. Have any of
you guys built one of these? Any suggestions?

The most critical component is probably the lens. It should
probably have a focal length of 500-800 mm and a diameter of
at least 3 inches. Where would I get a lens like this? Edmunds
comes up blank.

I would also need a first-surface mirror unless I have the print
parallel to the projection screen.

Suggestions appreciated.

KS

Are you sure you're looking for a camera obscura?
It sounds like you want an opaque projector.


Also known as an Episcope. Search for that online and you may get some more
information.


Peter