Quote Originally Posted by EASmithV View Post
it would be cool if it could take real A12 backs.
Wouldn't be impossible. Actually, it has be done before. Here are some examples:
http://www.f295.org/main/showthread....pinhole-camera (Bronica ETRS back)

http://www.ussrphoto.com/wiki/defaul...ContentID=1180 (Kiev film back)
kiev-back-pinhole-camera.jpg (image from www.ussrphoto.com)

http://www.fougougou.com/camera/stenoblad.html (Hasselblad back).
stenoblad-pinhole-camera-hasselblad-back.jpg (image from www.fougougou.com)

There are some problems with winding the film, though.
See:
http://www.flickr.com/groups/hasselb...7621609339135/
and
http://www.flickr.com/groups/hasselb...7623567361113/