Nikon Nikkor-O Auto 1:1/58 mm * / Nikon Nikkor-O Auto 58 mm f/1 *

The only Nikkor-O Auto 58 mm f/1 known to us to date, with serial number 580101. The serial number is believed to be a combination of focal length and maximum aperture values, as well as sequential number 1 for the very first lens in this series. Developed for Cathode Ray Tube (CRT) photography with an engraved magnification scale instead of a distance scale. Two of the extremely rare CRT-Nikkor Auto 58 mm f/1 lenses known to us bear serial numbers in the 58111x range, which is why we assume that the lens offered here may be a prototype. Included: Original blue rear cap (typical for experimental Nikon lenses), Adapter for Leica L mount for focusing to infinity. Literature: Robert Rotoloni, "The Complete Nikon Rangefinder System", p. 287 (illustrates the only other known NIKKOR-O f/1, but with 50 mm focal length); Uli Koch, "Nikon F The Lenses", 2nd Edition, p. 256, 257.