I know there are quite a few users of the SQA here, and am hoping someone can help me out.

I have a new-to-me SQA and I'm having a few problems with the mirror lockup.

Could someone give me the sequence of things regarding using the lock up?

I followed the manual, but my trouble seems to be that the shutter doesn't fire if I have it in "S" position. I have to return to N to reset things, then I have to advance to the next frame and I suspect that the shutter has fired and cocked all over again. I'm losing a few frames of film (more than a few) trying to figure it out.

I tried in "C" and things are fine, as the shutter closes, mirror lifts and I can fire the shutter and then it recocks and stays closed for next exposure. This isn't very practical for case by case photos, though.

I've never used this type of system before, being more accustomed to my twin lens reflex or 35 mm camera. I hope I posed the question correctly.

Thanks in advance.