I imagine this has already been covered, but I'll ask it again. I've been offered a Gundlich Turner-Reich Astigmatic 13"/21"/28" lens at a REALLY good price, I think ($100.00). How does this lens work? Do you disassemble it & put it together in a different configuration for the differing lengths or what? It's in an old shutter that seems to work but needs cleaning. The lens elements are clear with just a little haze.
Looks like it's either a pain to use or it might be an interesting find. Thanks for any help or direction.