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lieven23

39 mm versus 42 mm screw mount?

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lieven23

Hi

If i could choose between a 39 mm versus 42 mm screw mount?

What would be the best choice?

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Greyelm

The adapter for the 39mm mount is much shallower than the 42mm and the lenses tend to be smaller, so 39mm is a better choice if you want a more compact setup.

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Niko

I have both for different purposes: M42 for teles (Asahis) and M39 for wide/normal (Leica/Voigtlander lenses). The depth of adapters is very different!

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Collas

39mm was created by Leitz for the screw-mount Leica cameras, so the majority of the lenses available are going to be made by Leitz and will have higher value than they should for an old lens. They are designed for range-finder cameras and will be compact. They won't have automatic apertures. There are still some modern lenses produced with this thread, such as those from Voigtländer.

The M42 mount was created by Carl Zeiss Jena for the pre-war KW Praktica camera. In 1949 they were used for the Contax S, an early SLR. The lenses are designed for an SLR and will be physically larger. Some will have automatic apertures, but most won't. There are some modern lenses produced in the M42 mount, from Voigländer, KMZ in Russia and from Zeiss (ZS).

Lots of choices, and some extremely good lenses in both mounts. The M39 will limit the focal lengths available from extreme wide-angles to small telephotos (135mm). Using a suitable adaptor will enable the lenses to be used on M mount cameras as well, such as the Leica Ms, the Epson R-D1, the Ricoh GXR, the Zeiss Ikon, the Minolta CL, etc. And you can also use the Fujifilm M mount adaptor as well, as I do for some M39 lenses - a 1938 F6.3 28mm Hektor and a 1950s 35mm F3.5 Summaron.

M42 mount lenses are available in a much wider range of lengths, and will include zooms as well.

Nick

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