BTW, are you interested in any Tominon macro lenses? These are excellent performers and are cheap, cheap, cheap due to Polaroid taking a big dump on the market several years ago. I have lots of them sitting around ranging from 38mm through 135mm.
I have an Olympus 50mm Macro (which is good at 2:1), an 80mm (perfect at 1:1) and now a 38mm which is good for up to 1:6. Would any of these go beyond 1:6?
As I recall the Tominon 35mm (not 38... sorry) is optimised for 5-15x but youu'll need plenty of bellows to get there. I just bought a Tominon 17mm as part of a complete kit because I don't have that one. Those are relatively scarce on the open market these days. I doubt I'll ever use it though and it's optimised for 10-34x. If there's any interest in these two I've backed myself into a bit of a corner financially and will let them both go for a reasonable price.
What were these lenses made for? As far as I could find out some were put into Polaroid portrait cameras. But the 35 and 17, if they are really optimised for microphotography, what was their original use?