Quote: but the OM2n for me shows Olympus at their best - OTF metering was pure genius
I'm no Oly expert
Clearly.
Quote: but wasn't it off the shutter curtain, rather than OTF? A marketing gimmick, I thought, especially with that random pattern on the curtain to give a centre-weighted effect - pure marketing nonsense.
Yes and no. In aperture priority, for short exposures, 1/60 and above, it used the curtain - for longer exposures, it actually read the light off the film during exposure - up to a couple of minutes.
Oh, and the meter sensitivity ran down to something crazy like EV -5.5 to actually USE that two minute exposure.