Hi,
I also built a Bender Pinhole and use regular sheet film as well as a Polaroid
545 holder I picked up on ebay for about $85.00. It proved invluable in
showing me that I had a light leak where the holder sat and needed to add felt
strips where the film holder made contact. It also showed me that I had a
vignetting effect I didn't want. Because of the instant pictures I was able to
diagnose the problems and fix them very quickly. The polaroid is also a great
way to check the alignment of shots before using conventional film, although it
is somewhat expensive. I recommend the Polapan 72, a high speed B/W film that
does not require coating as other types do. My picture on Pinhole Day was with
the Bender. I'm very happy with it.
