Andrea B. Posted August 30, 2016 Share Posted August 30, 2016 Asahi Opt. Co. 85mm f/4.5 Ultra-Achromatic-Takumar (1)Blades: 6Elements: 3 fluorite, 2 quartz, 5 groupsFFD: 45.46mmFilter: 49mmMount: M42Note: The serial number of this lens has been deleted in the photo. For those folks curious about the UAT, this manual focus lens was prototyped in 1966 by Asahi Optical Co. (which became Pentax which became part of Ricoh). It was manufactured between 1973-1977. The UAT has an M42x1 screw mount and requires a 45.46 mm flange focal distance to attain infinity focus. Thus the UAT is easily adapted to short FFD mounts: Pentax, m4/3 (19.25 mm) or Sony E (18 mm). I'm not sure about the Canon EF/EFS mount with its 44 mm FFD, but I'm sure there are adapters out there somewhere for that 1.46 mm gap. The UAT is a no-go on a Nikon (46.5 mm) for infinity focus. Still useable for Nikon close-work though. The lens has an Auto mode and a Man mode when used on older Pentax camera bodies. Link to comment
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