Hello all, I just picked up an Argus C3, so far, I'm really impressed, but I've been forced to shoot with the aperture wide open as it seems to be stuck there. I'm not sure whether the aperture adjustment ring is stuck, or if I am trying to turn the wrong part/doing something else wrong. I am afraid to try and force it. I looked at the manual online, but there is no illustration on how to actually adjust the f-stop, just an explanation of what the aperture does. Just guessing, it seems the ring that actually has the stops printed on it is what should be rotating, but it won't budge. So can anyone out there tell me how (in detail) to adjust the aperture, or what may be gummed up and steps to fix the problem? Thanks, Bradd.