I just inherited an Aires 35 III C. (1.9/45mm) http://www.camerapedia.org/wiki/Aires_35 From my research, I gather it's basically a 1950's vintage Japanese knockoff of a Leica. Right? It's seems to be in good working condition and it looks like a really nice camera. It's in the original box with the manual and everything. So, I put a roll of film in it (Legacy/Neopan 400) and I'm giving it a test flight. I'm figuring it all out, pretty well but I'm still shaky on a couple of things. I can load it, focus it and operate everything but I'm having trouble understanding how the exposure is set. I see the shutter speed and aperture rings. I see the exposure (light value) numbers and I understand how the two rings couple to set reciprocal shutter speeds. I've got a Gossen Luna Pro meter. I understand how to read the exposure number off the meter and set the aperture/shutter to match. But I don't understand how to account for film of different speeds? Does the camera "know" this, somehow? Or do you have to manually compensate using the light meter in some way? I suppose I could just use the Gossen light meter and calculate the shutter/aperture combination then keep them in sync as I use it to make different shots in the same light. Have y'all got any pointers for me? Are there any pitfalls or idiosyncrasies I need to watch out for. (Okay... I already forgot to take off the lens cap once! ) Are there any special modes of failure that I need to watch out for? I have already read that one needs to operate the controls carefully so as not to jam them because, if you do, it's easy to jam things up and break things. Thanks in advance!