Back in the 1990s I had purchased a used film magazine, which caused intermittent misfire with my new (not purchased used) ETRSi body. The film-advanced interlock pin in the magazine protruded too far into the body. As a result, the mirror would swing upward, but it was prevented from swinging up fully all the time. As a result, the lens would sometimes be prevented from actuating the shutter and the flashing red LED in the viewfinder would not indicate shutter fire. If I mounted one of the film magazines which I had purchased new, there was not a problem...it happened only with the one used magazine, and intermittently. I needed to send both body and back to Bronica repair facility, where they shortened the pin on the magazine so it would not cause the mirror to make incomplete upward motion.
Last edited by wiltw; 07-07-2013 at 12:30 AM. Click to view previous post history.