Re: Zuiko OM Glass is good...
Well, I did have a Zuiko 65-200 f/4 zoom which got used with my OM film SLRs ... until I swapped it for a Tamron Adaptall-2 70-210 f/3.8-4 zoom which I found considerably sharper as well as more comfortable to use and lacking that nasty "macro" adjustment.
the shots from the 65-200 are considerably better than expected.
Consistently? You must have steady hands .... I'd give myself a virtually zero chance of getting a shot with 400mm at 1/125, hand held, that didn't show some evidence of camera shake and probably less than 1 chance in 4 of getting a shot that was usable. If I didn't have a tripod to hand I'd use a fence or wall to help steady the camera - and then I'd be reasonably happy at 1/125.
What is also remarkable is that I can still hand hold, what is effectivly 400mm at 1/125s and get a usable image.
If you're not living on the edge, you're wasting space