Has anyone had success shooting with this camera? I have tried two rolls of film, one 100iso and one 400iso. Each produces maybe one out of eight images, and the result is extremely, extremely faint. Nothing substantial enough to pull a print from. Am I doing something wrong? I am developing the film according to the standards on the box. For example, I put Arista 400 120 format in there, and develop it in D76 1:9 dilution for 8-9 minutes - which works for all my other film. Thanks in advance!