[pinhole-discussion] new to the list; Mamiya 7II lenscap

[Christina Z. Anderson]

I just got a Mamiya 7II lenscap pinhole and it seems that my camera's
shutter won't stay open on bulb, even with a cable release, with the pinhole
lenscap on.  Anyone else have this problem?  What to do?  My 35mm Nikon one
works great.
Chris