M42 Mount Lenses — The Universal Vintage Screw Mount
M42 is a simple 42mm screw thread shared by camera makers across Germany, Japan, and the Soviet Union from the 1940s to the 1970s — which is why it hosts the deepest catalogue of vintage glass anywhere: Pentax Super Takumars, Helios 44s, Carl Zeiss Jena, Pentacon, Mamiya/Sekor, Fujinon and more.
One thread fits all: any M42 lens mounts on any M42 body or adapter, no variations to check. Its flange distance is long enough to adapt to every mirrorless system — Sony E, Fujifilm X, Nikon Z, Canon RF, and Micro Four Thirds — with a simple, glassless adapter that preserves full optical quality.
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Frequently asked
Can I use M42 lenses on a mirrorless camera?
Yes — M42 adapts to Sony E, Fujifilm X, Nikon Z, Canon RF, and Micro Four Thirds with an inexpensive mechanical adapter. Focus and aperture stay fully manual, exactly as the lens was designed.
Which famous lenses are M42?
The Helios 44-2 58mm f/2 (swirly bokeh), Super Takumar 55mm f/1.8 and 50mm f/1.4, Carl Zeiss Jena Pancolar and Tessar, and the Pentacon 135mm f/2.8 'bokeh monster' are all M42 classics.
Do I need a specific M42 adapter for auto/manual pins?
Some M42 lenses have an Auto/Manual switch; if a lens is auto-only, choose an adapter with an inner flange that presses the stop-down pin so the aperture responds. Most quality adapters include it.