I ended up with with a CZJ 2.8/80 Tessar lens on a P6 mount to add to the battery of CZJ lenses I have. Would anyone care to comment on the thing? I have never owned one or used one but I seem to have read somewhere that they were only produced for one year. It is marked 1Q and is in exe++ condition. What can I expect in use compared to the CZJ 2.8/80 biometer? I did a search but didn't find much, the lens seems to be kind of rare in that mount.