The Leica Summicron-M 66mm f/2 is a limited Leica Classic Line M lens based on the historic ELCAN 66mm f/2, with 660 examples produced worldwide.
Leica Summicron-M 66mm f/2
M mount
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The Leica Summicron-M 66mm f/2 is a M-mount lens for Leica rangefinder cameras. Leica price index →
Specification
About this lens
Leica Summicron-M 66mm f/2
The Leica Summicron-M 66mm f/2 is a limited-production Leica M lens introduced in 2026 as part of the Leica Classic Line. It reinterprets the historic ELCAN 66mm f/2 developed by Walter Mandler at Ernst Leitz Canada in the late 1960s for a specialised United States Navy application.
The modern Summicron-M retains the unusual 66mm focal length that defined the original lens, positioning it between traditional 50mm standard lenses and short telephoto lenses. Leica states that its optical concept builds on the calculation of the historic ELCAN, while the production lens uses six elements in five groups.
The lens focuses from 1 metre to infinity and uses a Leica M bayonet with 6-bit coding. Its diaphragm consists of nine blades and operates from f/2 to f/16 in half-stop increments. An E49 filter thread is provided, and the lens measures approximately 60.1mm in length, 60mm in diameter and weighs approximately 456g.
A distinctive mechanical detail inherited from the ELCAN concept is the aperture ring. It rotates in the opposite direction to conventional Leica M lenses. The Summicron-M 66mm f/2 is finished in black anodised metal and was released as a limited edition of 660 lenses worldwide. Each example is individually numbered and supplied with a certificate of authenticity.
Optical qualities
Rendering
Leica describes the Summicron-M 66mm f/2 as producing a soft bokeh effect at maximum aperture while retaining strong image contrast. The 66mm focal length provides a moderately compressed perspective compared with a 50mm lens, making it suitable for portrait, reportage and detail-focused photography.
Sharpness
According to Leica, the optical design was developed around the high-resolution objective associated with the original ELCAN concept. When stopped down, the lens is intended to provide high detail resolution across the image.
Contrast and color
Leica specifically describes the lens as delivering high contrast when stopped down. Independent long-term optical testing of the production lens remains limited because the lens was only introduced in 2026.
Bokeh and transitions
At wider apertures, Leica describes the background rendering as soft and harmonious, with subject separation enhanced by the 66mm focal length and f/2 maximum aperture.
Digital use
The lens incorporates Leica M 6-bit coding and is therefore recognised electronically by compatible digital Leica M cameras. It can also be used on Leica SL cameras through the appropriate Leica M adapter.
History
Development and Launch
The Summicron-M 66mm f/2 was introduced by Leica Camera AG in September 2026. It was developed as a modern reinterpretation of the ELCAN 66mm f/2, an unusual specialist lens created by Walter Mandler while he was Head of Optical Development at Ernst Leitz Canada.
The original ELCAN was developed in the late 1960s for the United States Navy. Leica states that the 66mm focal length resulted from the optical requirements of the project rather than from a conventional commercial focal-length category. The objective was to combine high resolving power, a relatively fast f/2 aperture and compact dimensions.
The modern lens was introduced within Leica's Classic Line rather than as a regular-series Summicron focal length.
Production Evolution
The 2026 Summicron-M is not simply a reissue of the original ELCAN barrel. It is a newly produced Leica M lens that draws on the earlier optical concept while incorporating modern Leica M compatibility and 6-bit coding.
The production specification uses six elements in five groups, a nine-blade diaphragm and an E49 filter thread. The aperture control preserves one unusual characteristic of the historic lens, its direction of rotation is reversed compared with conventional Leica M lenses.
Special Editions/Variants
The Summicron-M 66mm f/2 was introduced as a limited edition of 660 units worldwide.
Each lens carries an individual three-digit edition number and is supplied with a certificate of authenticity. Leica identifies the standard production version under material number 11099.
No separate optical or mechanical production variant has yet been documented.
Collector Notes
The modern Summicron-M 66mm f/2 should not be confused with the historic ELCAN 66mm f/2.
Although Leica explicitly links the new lens to Walter Mandler's ELCAN design and states that it builds on the original optical calculation, the 2026 Summicron-M is a distinct modern production lens with its own Leica product identity, 6-bit coded M mount, production specifications and limited-edition numbering.
The 66mm focal length remains unusual within the Leica M system and is one of the primary identification characteristics of both the historic ELCAN and this modern reinterpretation.
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