I recently bought a contax IIa camera from keh.com. I just opened the box like an hour ago but I think that my shutter is erratic.

I checked the 1 second shutter speed and sometimes it works and sometimes it is way too fast. The bulb works but the slower shutter speeds (maybe all) seem erratic..they are either seem normal or they are way too fast. Before returning this camera I was just wondering if I was missing something? I don't have experience with contax cameras so maybe it is an operater error?

Is this "normal" erratic shutter behavior or am I missing something? I've never had a shutter behave like this...usually it is too slow.