|Posted: Wed Sep 19, 2018 6:19 am Post subject: CZJ Biotar infinity focus problem
This is my first post as a member, after reading so many topics in this forum. Hope you guys can help me.
I have a Zeiss Biotar 58mm f2, silver 17-blade version with red T (SN 3112123). Formerly, it had an Exakta mount but it was replaced with a M42 screw mount. I bought it for really cheap and it was really dirty and quite frozen, due to the hardened grease inside its helicoid. It took a lot of force to make the focus and aperture rings to rotate. A friend of mine and I took the lens apart and cleaned it, removing the old grease and dirt from it, making the aperture and focus rings softer to move.
The problem I'm having is with the focus distances. This lens usually focuses from 0,9m to infinity, but mine only focuses to about 2m when the focus ring is set to infinity. I thought that it was still useful for some portraits, but the lens felt even more limited to use when I tested it, both in digital and in film. Since then, I didn't dare to disassemble the lens again, afraid of making it worse.
Hope you guys can help me with this. Thank you all.
22, São Paulo, Brasil