Likely the shutter. If you can see the leading edge of the second curtain give it a little nudge with your finger nail. This will finish the shutter travel and release the mirror.
If so it needs clean and lube. Powell > >I have a H1 that occasionally gets stuck with the mirror up after the >shutter fires. Loosening the lens slightly releases it. Obviously as >the lens rotates, the diaphragm pin is kicking the diaphragm release >mechanism free, releasing the mirror, but which part is really getting >stuck? I plan on getting the camera CLA'd soon, is that likely to fix >the problem, or is there something more sinister at work? Any thoughts >would be appreciated. > >Glenn >-- >Love all, trust a few, do wrong to none. >
