Help on ZYKOR 500mm F:8 – 800mm F:12

[pjgoswami]

Dear Sir/Madam,
Yesterday one of my friend’s friend given one lens to my friend. Basically the friend of mine and me Nikon user. The lens specification is “ZYKOR 500mm F:8 – 800mm F:12 zoom mirror lens” and it is made in Japan.

We both inspected the lens for detail, but when we look at its mount we are wonder that it not going to fit to our mount. And one more thing we observed that the camera mount of that lens can be turn left and right about 90degree. Please guide me how we can use this lens with our Nikon systems.

Sorry that, at present I do not have the photograph of that mount when I could take the photos I will upload here for identification.

Thanking you
With regards
Pranab.