Thanks to the help (and despite my own stupidity) on display in this older thread, I've just got back a film that cheerfully went through my newly acquired, almost-fifty-year-old Olympus 35-S (45/1.9). There's quite a bit of flare and focusing is perhaps not exactly right -- but I do like the results. Or anyway I like the results on 3/4 or so of the film, which include the only times I tried 1/500 (which has decided in the last couple of days that it wants to work after all) and 1/250. As for the remaining 1/4 or so of the film (a consecutive set of frames in the middle), they're grotesquely overexposed. I'm grateful for the camera-shake: it proves that the problem was the shutter not that the iris failed to close. (Actually the iris "feels" and looks immaculate.) I have very limited knowledge of old cameras (as I suppose is painfully obvious) and virtually all of my limited experience is with focal-plane shutters. I thus wonder if I could be ignorantly mistreating this old shutter in some way. With most old FP shutters, one should change the speed only after winding on: is it the same (or the opposite) with elderly leaf shutters? While the camera was gobbling up the film, and perhaps before and after the set of grossly overexposed frames, I may have fiddled with a little lever at the bottom of the lens that selects among F, M, and X. These are to select the appropriate flash synchronization, I presume. Is there any easily imaginable ailment of old shutters by which the synchro setting might affect the shutter speed? Or, when one's not using flash of any kind, are there safer or unsafe synchro settings? Interestingly -- or entirely normally? -- there are no click-stops for the shutter-speed dial. FWIW I've tried to set the speed at one or other marked speed, rather than between. Go ahead, laugh at my ignorance above: I'm thick-skinned. However, I'd be most grateful for any tips or general enlightenment.