I'll just add a few comments:
- It's a full-size SLR with a good bit of heft to it. It lends to a very stable shooting platform.
- The frame counter never moves unless the film is loaded properly. It prevents you from shooting a roll of blanks.
- The shutter release is a bit low and benefits from one of those little mini-releases.
- The viewfinder has a diagonally split center spot, which I really like.
- This camera later returned as the Zeiss Ikon SL 706 before resurfacing one more time nearly unchanged (mechanically) as the Voigtlander VSL 1 and Rolleiflex SL 35 M with a final variant that added aperture-priority autoexposure.
- I can confirm that the Tessar lens on this is excellent. It takes two-lobe B50 filters and close-up lenses. But this B50 is different from the Hasselblad Bay 50 -- they aren't interchangeable.
- It's a very nice camera (old school) and had Zeiss Ikon survived would have been the basis for a new line of consumer SLRs.
I posted a review of the Zeiss Ikon SL 706 on another forum.
Here's the link, which includes some photo samples.