I found last month an interesting black/nikel sonnar f2 in a f1.5 barrel, from 1935 :
Heavy nickel barrel from a 1.5 with a black band, chrome aperture ring to f2. I did not found much on these, but it looks like there was a batch produced like that (it was probably not assembled afterwards from spare parts). Mine is in good shape : some small scratches on the front but not much to worry about, a cosmetic scratch on the black paint, a little oil on the blades. Just did some very quick test shots with my M8 : very much usable! Impressive for an almost 80 years old lens. I payed ~150€ but I can use it on Contax and Leica M, and looking at the summar/summitar prices now
it looks like a bargain.
Only references I found was :
- Kuc's book : a pictures of the variants of the f2 sonnar, showing two such "franken", one with a barrel like mine and one with a chrome barrel and a s/n from 1936. Just says it is uncommon.
- Kevincameras site : http://www.kevincameras.com/gallery/...166/?g2_page=1
; called "transitional sonnar"
Does anybody knows anything about these strange sonnars?