Besides the modern Voigtlaender wides and the Kiev clones, I think they're all oddballs. There's a partial list at http://camerapedia.wikia.com/wiki/Co...efinder_lenses.I wonder what other lens brands are made for the contax?
I actually have a Som Berthiot 28/3.3 Angulor in Contax mount; it may be a conversion job. I've never shot a lot with it, but it seems to be a decent lens. The Vade Mecum says it's some sort of variation on the Tessar design, IIRC.