The Jupiter 12, coated copy of a pre ww2 lens, there will be howls of indignation here - but I've had three through my hands, over the years and each was pretty dismal compared to most other 35mm glass i've tried!. No - they were not in need of adjustment, cleaning, hazy or anything else, so I must have been unlucky three times?. You will get all the usual stuff about good and bad samples, assembly workers had too much vodka, etc, etc, but by the time you had sent one to one of the recognised lens wizards for a magic spell, you would have been far better of getting something else - or maybe saving for a VC Skopar. I must now run for cover! 😱
Cheers, Dave