by Hepcat » Tue Feb 16, 2021 9:54 pm
Old thread here, but I'll give an answer for posterity.
I have an original build Hartblei Super-Rotator 45mm f/3.5 in Pentacon Six mount, adapted to Mamiya 645. Ten years ago or more I had the fore-runner of that lens, the original Hartblei 45mm f/3.5 TS-PC MC lens. They're based on the Mir-26 Arsenal-factory glass. The lenses optics are a good match for any of the Mamiya glass out there, and the build quality of the lens barrels is superb. If you want a TS lens for 6x6 or 645, there's really no other competition anyway, but you need not fear image quality issues with the Super-Rotators, if you can find one.