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Kilfitt M39 Extension Tube (Muzwi) - Accessory

Kilfitt M39 Extension Tube (Muzwi) - Accessory

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Extension tube with M39 thread on both ends. Unclear what the original use case was (bellows?) or if it was just an extension tube from the beginning. Optical thickness ~14.5mm.

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LTM / M39

M39 is a screw-type mount system originally designed by Oskar Barnack for Leica cameras in the 1930s. These Leica Thread Mount (LTM) camera bodies attach lenses using a 39mm threaded screw mount.

This mount was the prominent rangefinder mount for Leica until 1953 when the M3 debuted. The M Mount bayonet spelled the end for Leica’s thread mount cameras, although other manufacturers, like Canon, Leotax, and Zorki, continued to use the M39 mount for their cameras.

There are some early Soviet SLRs that also use a 39mm thread mount called M39. Lenses for this system are incompatible with M39 rangefinder lenses, and vice versa, due to differences in flange distance.

M39 rangefinder lenses can be easily adapted to mirrorless camera systems.

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Kilfitt M39 Extension Tube (Muzwi) - Accessory Availability & Price History
Date Sold SKU Quality Control Price Image
Available T47804 $10.00 Kilfitt M39 Extension Tube (Muzwi)