Nippon-Kogaku Micro-Nikkor 50mm f/3.5

Nippon-Kogaku Micro-Nikkor 50mm f/3.5

The Micro-Nikkor 50mm f/3.5 is Nippon Kogaku's original high-resolution Micro lens in factory Leica screw mount, using a specialized dual-range focusing mechanism.

Optical qualities

Rendering

Nikon identifies the five-element, four-group design as an original Xenotar type developed for fine-detail reproduction. It was optimized around reduction work rather than conventional infinity-only photography, yet remains usable across its focusing range. Optical condition is especially important for contrast.

Handling

The white distance range from infinity to roughly 3.5 ft is rangefinder coupled. The red close-focus range continues to about 1.5 ft but is not coupled, so it requires measurement or live view. The collapsible arrangement changes position to access the near range.

History

Development and Launch

Nikon traces the lens to research for high-resolution microcard reproduction. Mass production began in 1956, creating the first Micro-Nikkor for Nikon S and Leica L-mount cameras.

Production Evolution

Front-ring engraving can appear with or without the C coating suffix. These markings and minor exterior changes remain within one profile when the 5cm f/3.5 factory LTM lens is confirmed.

Special Editions/Variants

Nikon S-mount and Leica screw-mount barrels exist. This entry covers the black-and-chrome LTM version and not the later 55mm Nikon F-mount family.

Collector Notes

Verify the two distance scales, the transition between coupled and uncoupled ranges, and the original Leica screw mount. Check carefully for haze, separation, cleaning marks and stiffness in the complex focusing mechanism.