Leica 40mm f/2 Lens — Specs, Reviews, Used Prices

Leica M 40mm f/2 Leitz Wetzlar Summicron-C Lens

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Minolta 40mm f2 M-Rokkor Lens (Leica)

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Product Highlights

Compact and lightweight design
High-quality Leica optics
Smooth bokeh with f/2 aperture
Compatible with Leica M-mount cameras

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Minolta 40mm f2 M-Rokkor Lens (Leica)

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$496.06

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Lens Overview — Leica 40mm f/2

The Leica M 40mm f/2 Leitz Wetzlar Summicron-C is a manual focus prime lens built for Leica M-mount rangefinder cameras. With a maximum aperture of f/2 and a 40mm focal length sitting squarely in the standard range, this lens offers a natural field of view well-suited to everyday shooting situations. Designed for full-frame coverage, it pairs with any Leica M-mount body without crop concerns.

At just 190g, the Summicron-C is notably lightweight for an M-mount lens, making it a compelling option for photographers who prioritize a minimal, unobtrusive kit. The 39mm filter thread keeps accessory costs reasonable and aligns with a number of classic filter options. As a purely manual focus lens — consistent with the rangefinder shooting experience — it rewards deliberate, considered technique.

There is no image stabilization, which is expected for a lens in this category intended for use with rangefinder cameras. The Leica M mount compatibility means it will couple mechanically with the rangefinder focusing system found in M-series bodies. For shooters drawn to the Leica M system who want a lightweight, fast standard prime, the Summicron-C 40mm f/2 presents a historically significant and practically capable option.

Key Features — Leica 40mm f/2

40mm f/2 Summicron-C: A fast f/2 maximum aperture at a natural 40mm focal length suited to street, travel, and everyday documentary shooting.

Leica M Mount: Native M-mount coupling integrates directly with the rangefinder focusing mechanism on all Leica M-series bodies.

Full-Frame Coverage: Designed for full-frame sensors and film, with no vignetting or crop factor concerns on any M-mount body.

Leitz Wetzlar Heritage: Produced during the Leitz Wetzlar era, making this a historically significant piece of Leica optical history.

190g Compact Build: At just 190g, this is one of the lightest M-mount primes available, keeping kit size and weight to a minimum.

39mm Filter Thread: Standard 39mm thread is shared across many classic Leica lenses, allowing filter accessories to be used interchangeably.

Lens Specifications — Leica 40mm f/2

Leica 40mm f/2 full specifications
Spec	Detail
Use Cases	Portrait, Street, Travel
Lens Type	Prime
Format	Full Frame
Zoom/Prime	Prime
Focal Length	40mm
Maximum Aperture	f/2
Camera System	Rangefinder
Lens Mount	Leica M
Autofocus	No
Focus Type	Manual
Image Stabilization	None
Filter Thread	39mm
Weight	190g

Description — Leica 40mm f/2

The Leica M 40mm f/2 Leitz Wetzlar Summicron-C is a prime lens built for the Leica M rangefinder camera system, covering a full-frame image circle with a fixed 40mm focal length. The f/2 maximum aperture gives photographers a meaningful edge in available-light situations while keeping the lens compact. Weighing in at just 190g, it is a genuinely portable option that won't burden a minimal travel or street kit.

Focus is entirely manual, in keeping with the rangefinder shooting philosophy, and there is no image stabilization. The 39mm filter thread diameter keeps the front element compact and compatible with a range of slim filter accessories. As a standard-range prime on the Leica M mount, the Summicron-C 40mm f/2 is a purposeful, no-frills lens designed for photographers who appreciate deliberate shooting and the tactile experience of the rangefinder system.

Pros — Leica 40mm f/2

✓Fast f/2 maximum aperture provides strong low-light capability for a manual prime
✓Extremely lightweight at just 190g, making it ideal for travel and extended carry
✓Full-frame coverage on Leica M-mount bodies with no crop factor concerns
✓Standard 40mm focal length sits in a versatile range for everyday photography
✓39mm filter thread gives access to a wide range of compact filter accessories
✓Native Leica M mount ensures direct mechanical compatibility with M-system rangefinder cameras

Cons — Leica 40mm f/2

✗Manual focus only — no autofocus option for fast-moving subjects
✗No image stabilization, so handheld shooting in low light depends entirely on technique and shutter speed
✗Leica M mount limits compatibility to M-system bodies and third-party adapters
✗The 40mm focal length sits between the more common 35mm and 50mm framelines found on many M bodies, which may require using the 35mm or 50mm frameline depending on the body

Videos — Leica 40mm f/2

BUDGET Leica! The Minolta 40mm F2 — GxAce

Resources & Downloads — Leica 40mm f/2

Manuals & Guides

User Manual
PDF · 5.5 MB

Frequently Asked Questions — Leica 40mm f/2

What camera mount does this lens use?+

The Summicron-C 40mm f/2 uses the Leica M mount, making it compatible with Leica M-mount rangefinder cameras. It is designed specifically for the rangefinder camera system.

Does this lens cover full-frame sensors?+

Yes, the lens has a full-frame lens format designation in its specifications, meaning it is designed to cover full-frame image sensors and film.

What is the filter thread size on this lens?+

The filter thread diameter is 39mm, which is a compact size consistent with the lens's lightweight and slim profile.

How heavy is the Summicron-C 40mm f/2?+

The lens weighs 190g, making it one of the lighter options in the Leica M-mount ecosystem and well-suited for travel or street photography where pack weight matters.

Does this lens have autofocus or image stabilization?+

No — this is a fully manual focus lens with no autofocus capability, and image stabilization is listed as none. Focusing is achieved manually, consistent with the rangefinder shooting style.

Is this a zoom or a prime lens?+

This is a prime lens with a fixed 40mm focal length, falling within the standard focal length range as specified in its data.

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