Those paper hole images are oh, so soft. Would be so much better with a brass pinhole. Just use a black body cap with a .02"/.5mm on the front. That's very close to a 50mm focal length @ about f100. .5mm can be done with wire gage bits and thin brass sheets can be acquired @ a hobby shop.
Even if one does not get serious about it, something better than paper should be easy to do. Sincerely, Collin Brendemuehl http://kerygmainstitute.org "He is no fool who gives what he cannot keep to gain what he cannot lose" -- Jim Elliott -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.