I recent received my 45mm and I've tested it out a couple of times including today. The one thing I didn't like was the front trim ring as it made me nervous and I hated the design of it. Well, second time out with it I managed to lose it. I'm sure it got partially undone during a lens change and fell off sometime during the1 1/2 hours I was out today. I foresee a big market in chinese knock-off replacements...... Olympus would have been better off going with a traditional design and forgetting the bayonet mount hood. I realize this would have killed a potential profit center, but would certainly been more in line with the design of the lens. If I ever buy a replacement, I'm going to put a little Elmer's glue on it a and use a screw on hood.