Leica 50mm f/2.5 Summarit-M M-Mount Lens with Protection Ring, Made in Germany, Black, 6-Bit {39} 11644

Leica's compact 50mm built for rangefinder discipline

The Summarit-M 50mm f/2.5 is Leica's answer to the question of how much lens you actually need. At 230g and just 33mm long, it disappears onto an M body in a way that the faster Summicron and Summilux variants simply don't. The 6-element, 4-group optical formula is a studied design, and the f/2.5 maximum aperture lands in a sweet spot for available-light work without pushing the price into stratospheric Noctilux territory. Six-bit coding talks directly to digital M bodies for automatic lens detection and vignetting correction.

The aperture ring clicks through full stops with half-stop detents available, giving you tactile precision that matters when you're zone-focusing on a moving subject. A 0.7m minimum focus distance is standard for M-mount glass, and the engraved distance and depth-of-field scales make hyperfocal shooting a legitimate working method, not a guessing game. The all-metal barrel and mount, assembled in Germany, carry the mechanical feel that M photographers expect.

For shooters who run adapted Leica glass on Sony E, Nikon Z, Canon RF, or L-Mount bodies, the 52mm diameter and 39mm filter thread fit neatly into a travel kit. This lens has been proving itself since 2007, and its compact footprint remains one of the strongest cases for choosing it over heavier, faster 50mm alternatives.

Who It's For

Street photographers working from a Leica M body will find the small profile and quick zone-focusing scales cut reaction time down to what the rangefinder system was designed for. Travel photographers who want a capable 50mm without adding bulk to a minimalist kit benefit from the 230g weight and 33mm length. Documentarians shooting in low-profile situations gain from a lens that draws no attention on the street. Sony E or Nikon Z mirrorless shooters building an adapted M-mount kit get a well-built manual-focus 50mm at a more accessible price point than the f/2 or f/1.4 Leica alternatives.

Key Features

• 6-element, 4-group optical formula with f/2.5 maximum aperture
• 230g weight and 33mm length for rangefinder discipline
• 6-bit coded for automatic lens detection on digital M bodies
• Manual focus with 0.7m minimum and engraved distance scales
• Aperture ring with click-stops and half-stop detents
• Metal barrel and mount assembled in Germany
• 39mm filter thread for compact kit integration

FAQ

How does the Summarit-M compare to the Summicron f/2 50mm?

The Summarit trades one stop of light for 100g less weight and a significantly lower price. The Summicron is sharper at f/2, but the Summarit's f/2.5 is plenty fast for available light, and its 33mm length makes it the obvious choice if your kit is built around minimalism.

Does this lens work on digital M bodies?

Yes. The 6-bit coding enables automatic lens detection and vignetting correction on M240, M262, and M6 Typ 262 bodies. Manual M film bodies and later digital M models read the coding without correction features.

Can you use this on mirrorless adapters?

The 52mm diameter and all-metal construction adapt cleanly to Sony E, Nikon Z, Canon RF, and L-Mount systems. You lose electronic communication to the camera, but rangefinder lenses were designed for manual focus anyway.

What's the minimum focus distance, and how usable are the depth-of-field scales?

0.7m minimum focus is standard for M-mount glass. The engraved DOF scale eliminates guessing on hyperfocal distance. Stop down to f/8 or f/11, lock focus at a marked distance, and everything from that mark to infinity stays sharp.

Is the aperture ring hard to use, or does it have reliable detents?

Click-stops at full stops with half-stop detents in between. It's deliberately tactile. You're not fumbling in the dark-the ring has the mechanical feedback M photographers expect from German glass.

Why is there no autofocus on this lens?

M-mount lenses are manual focus by design. Rangefinder focusing is faster and more reliable in low light than AF, and the lens is built around that discipline. If AF is required, this isn't the right mount system.

What kind of filters do I need, and what about lens hoods?

39mm filter thread. A protective ring is included, but no hood comes with the lens. A 39mm collapsible hood fits if you want one, though the compact barrel means you're rarely blocked by vignetting.