Thanks again Peire, I think I'll drop the OM 90/2 from my search. ;o)
Thanks uhoh, Nice, but I don't think the LTM's what I'm looking for.
I'm finding that focussing the Bokina at distance is tricky, as the tiniest touch changes it massively. Most 90-ish macros that I've tried seem to be like this. Also, in my comparisons, the Bokina looks the "flattest", I suppose that's low contrast? I'll try and find a comparison example to post.