I'm getting the stuff ready to put together a 8x10 pinhole camera made from wood. I'm thinking that 12" is the proper distance from film to hole at least if I get the hole the right size? Is there a premium distance in regards to film from hole distance? Thanks for any assistance, 44 and this will be my first attempt at putting together a pinhole camera, well actually it'll be the first time I even tried one!

James