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Asahi Opt. Co. 85mm f/4.5 Ultra-Achromatic-Takumar (1)

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#1 Andrea B.

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Posted 30 August 2016 - 15:11

Asahi Opt. Co. 85mm f/4.5 Ultra-Achromatic-Takumar (1)
Blades: 6
Elements: 3 fluorite, 2 quartz, 5 groups
FFD: 45.46mm
Filter: 49mm
Mount: M42
Note: 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.

Attached Image: UAT_v1_20160829wf_49553.jpg

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The lens has an Auto mode and a Man mode when used on older Pentax camera bodies.
Attached Image: UAT_v1_20160829wf_49563.jpg

Attached Image: UAT_v1_20160829wf_49555.jpg

Attached Image: UAT_v1_20160829wf_49561.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.