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.