I like my OM2n's for carry-around cameras because I find that I frequently want the aperture priority mode more than the mirror lock up under those "walking-around" circumstances. When I'm shooting more thoughtfully and using the tripod I almost always go for the OM-1's and use the mirror lock up. This (in combination with good Zuiko glass) is capable of producing negatives (or slides) of amazing sharpness and quality. I've seen 20x24 inch prints from 35mm negatives made using this combination that knocked my socks off. Sure there was some grain, but isn't that supposed to be there?