I own two semi-antique (or at least old) Carl Zeiss Jena Tessar 50mm/2.8 M42 lenses.
Yesterday, both decided that their apertures would not properly close.
I have to admit that the guy who lubricated their focusing screws a year ago just might have been overdoing the oiling a bit… (after all, it was I). But what’s the probability that they would both go bad exactly the same day?
I have to get that lens spanner that I yearn for…
Claes in Lund, Sweden