Hard to believe that some sellers of Russian lenses in Fed/Zorki Mount continue to give bad information that they can be used on a Leica standard camera, that the Russian lenses were made to the Leica 51.6mm standard.
THEY ARE NOT, How do I know? Because I have the Data Sheets that came with some of my lenses. That simple. 52.4mm +/- 1% tolerance. If you get lucky, and the lens is on the lowest end of the tolerance- it's close on a Leica. Gaussian Curve for tolerance- you need to adjust the shim. Far end of the tolerance, you need to adjust focal length and the shim.
That's the laws of Physics.
Sellers that claim the Russian lenses were built to the Leica 51.6mm spec are liars. I have serviced a number of lenses sold by these same sellers.
For Jupiter-3: ever notice a slight play in the focus, where it moves some small fraction of a millimeter before the dampening kicks in? OR -worse- it jams up after a CLA? I learned to keep the guide screws in order, put them back in the same slot that they came out of. 90% of the time, will...
The one in the thread above went from a Seller in the US that sells Russian lenses at a premium, went to Australia, to me, back to Australia. The shipping alone makes it one expensive Jupiter-3. The original sale price makes it one of the most expensive I've ever handled.
I'm tired of the lies and accusations that all the problems are caused by people like me that service them to actually work on a camera. This lens had never been opened before I got it:
This is the 9th Valdai Jupiter-3 that I've shot with, and I've bought even more "new-old'stock" optical cells. I bought this one off of Ebay, the seller used it on a mirrorless camera. Lens as described, positive feedback left for the seller. No surprises to me, this is somewhere around 200...
ANYWAY! Keywords: "Jupiter-3", "Jupiter-8" "JUPITER CLA", "Adjust Jupiter for Leica", "Russian lenses made to Zeiss Standard".
I hope poeple researching this lens get a hit on this thread.
Almost forgot- "Valdai Jupiters are the worst".