I am 0 and 4 for buying Jupiters off of Ebay and getting one that has not been rendered unfixable without major replacement of parts. I'm looking at Ebay auctions out of the FSU with "Shiny Metal", Dubious Modifications, and Namerings of Desirable Vintage that have been put on hacked together lenses. Instead of Fake Sonnars, there are a lot of Fake ZK and Fake KMZ Jupiter lenses. More lenses are arriving that are jammed and cannot be separated from the focus mount. The Hacker probably did not have proper shims or retaining rings. The early lenses coming out of the FSU seem to be the bottom of the barrel.
My last three J-8's, purchased all as they were from 1952- a good year. Clean glass. Two were cemented into the barrel, and coukd net get the glass out. Focus bad on both. "Plan B"- set focus by unscrewing the rear fixture, which worked because both lenses close-focus. Someone used too thick of a shim. The third- clean glass, missing the close-focus stop. Just be careful not to focus too close. The last J-3 bought, someone mixed and matched optics between new and old, put into a late one-piece barrel and back in to a 1955 Focus mount. The only reason I bought it- had enough spare parts to rebuild "hoping" I could unscrew the barrel from the mount.
Did we clean them out over the last 15 or so years?
Please post your Recent Jupiter Purchases here, either Good or Bad.
My last three J-8's, purchased all as they were from 1952- a good year. Clean glass. Two were cemented into the barrel, and coukd net get the glass out. Focus bad on both. "Plan B"- set focus by unscrewing the rear fixture, which worked because both lenses close-focus. Someone used too thick of a shim. The third- clean glass, missing the close-focus stop. Just be careful not to focus too close. The last J-3 bought, someone mixed and matched optics between new and old, put into a late one-piece barrel and back in to a 1955 Focus mount. The only reason I bought it- had enough spare parts to rebuild "hoping" I could unscrew the barrel from the mount.
Did we clean them out over the last 15 or so years?
Please post your Recent Jupiter Purchases here, either Good or Bad.