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Asahi Opt. Co. 85mm f/4.5 Ultra-Achromatic-Takumar (2)


Andrea B.

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Asahi Opt. Co. 85mm f/4.5 Ultra-Achromatic-Takumar (2)

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.

 

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.

 

UAT_v2_20160829wf_49592.jpg

 

UAT_v2_20160829wf_49594.jpg

 

UAT_v2_20160829wf_4959601.jpg

 

The UAT on an adapter for use on a Sony aR7.

UAT_v2_20160829wf_49585.jpg

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