NIKKOR-O 55mm F1.2

NIKKOR-O 55mm F1.2

This so-called CRT lens was used for taking pictures of oscillograph screens.
The lens had 39mm Leica screaw mount. But, it couldn't take any photographs in infinity.

So, I remodeled this lens mount , and now, it works with the Leica M. Of course it works with the range finder!
The lens was modified by a Japanese specialist Mr. Miyazaki. It got a helicoid, and a Leica M mount. Then, It can focus to 0.6m from infinity. But, There aren't any focus indication on the barrel.

Lens Construction : 6 groups 8elements
Smallest Aperture : F11
Picture Angle : 45° ?
Aperture Blades : 13
Nearest Distance : 0.6m (It works with the range finder!!!)
Filter Size : 52mm
Weight : about 380g
Mount : Leica M mount