> I don't know much about the 55/1.2. It is not regarded as the sharpest knife in the box and many fo them suffer from oily diapghram blades. Your OM-10: If it's negative (print) film and got no exposure, then film would be blank (clear). There is a chance that the film slipped off the takeup spool and therfore did not transport through the camera. After loading, gently turn the rewind knobclockwise until there is some tension. Then wind the shutter and watch the rewind knob. Knob should turn as film is pulled out of the cartridge.