Nippon Geo-Nikkor lens

[pierre506]

164896
64mm f8
Couldn't find any information about it.
Anyone knew it?

[Oren Grad]

Probably a lens for photogrammetric applications. The closest I'm able to find is the 60mm f/11 Geo-Nikkor, which was apparently used in the Nikon TS-120 and TS-20 stereo photogrammetric cameras. So far I haven't been able to find what film or plate size these cameras used.

http://nikonfan.cocolog-nifty.com/blog/2008/01/post_f1e9.html

https://www.asprs.org/wp-content/uploads/pers/1980journal/mar/1980_mar_329-332.pdf

http://www.eng.chiba-u.jp/outLstMuseum.tsv%3Fuk1=%25E5%25BB%25BA%25E7%25AF%2589.html

[pierre506]

Thank you, dear Oren, it's a Nikon R101 Stereocamera.