Leica M-mount

The Leica M mount is a camera lens mount introduced in 1954 with the Leica M3, and a range of lenses. It has been used on all the Leica M series up to the current film Leica M7 and digital Leica M.

This lens mount has also been used by Minolta on the Minolta CLE rangefinder camera, by Konica on the Hexar RF, by Voigtländer (Cosina) on the late models of the Bessa range, by Rollei on the Rollei 35RF and very recently by Zeiss Ikon on the latest Zeiss Ikon rangefinder camera and by Ricoh in the GXR system.

Compatible lenses

Leica lenses

(incomplete list)

With the Leica M:

Leica M4

The Leica M4 is a 35 mm camera by Leica Camera AG.

Leica M4

The M4 started production in November 1966, as the direct successor of the M3 and M2, featuring framelines for 35 mm, 50 mm, 90 mm and 135 mm lenses in a 0.72 magnification viewfinder. It has the frame counter of the M3, with automatic reset after reloading.

Three ergonomic modifications were introduced in the M4:

Production of the Leica M4 ceased in 1975.

Leica MDa

A scientific version without a viewfinder was made as Leica MDa (similar to the Leica M1).

Leica M4-2, Leica M4-P

Production of the M4 stopped briefly in 1972. Its successor, the M5 had been introduced in 1971. However, the relatively bulky and expensive M5 met with a cool reception, and sales did not live up to Leica's expectations. Production of the M4 was therefore restarted quickly until 1975. In the year 1975, a special edition was made for Leica's 50th Anniversary, and in 1977 the company launched the updated M4-2, which was based on the M4's body, but with a streamlined production process that reduced manufacturing cost. The M4-2 added a hot shoe and motor drive compatibility as standard, but removed the self-timer.

Leica M2

The Leica M2 is a 35 mm rangefinder camera by Ernst Leitz GmbH of Wetzlar, Germany, introduced in 1957. Around 82,000 M2s were produced between 1957 and 1968. Around 1500 M2s were produced by Ernst Leitz Canada, but most of these are not marked as such on the top plate.

The Leica M2 is the camera that was used by Alberto Korda to take his famous photo of Che Guevara.

Comparisons

The M2 was considered to be a more affordable, simplified version of the 1954 Leica M3. Notably, the frame counter of the M2 was composed of a disk plate beneath the film advance lever that had to be manually reset to zero after reloading. This system was close to that of the Leica III series, and unlike that of the M3, which is an independent frame counter, visible through a window in the top plate, that automatically resets to zero when the film take-up spool is removed.

The rangefinder system was also simplified from that of the M3 and this made it potentially more prone to rangefinder flare. The M2 has a rangefinder with a 0.72 magnification and framelines for 35, 50 and 90mm lenses instead of the 0.91 magnification and 50, 90 and 135mm framelines of the M3. This made it better suited for photojournalists who favour shorter lenses or for spectacle-wearers using a 50mm lens who sometimes find it difficult to see the framelines on the M3. The ground glass frameline illumination window of the M3 was replaced with a fresnel-type plastic lens. Finally, the ornate beveling around the various windows on the front of the M3 were flattened on the body of the M2. Unlike the M3, the widest framelines were not always visible so only one set of framelines were ever displayed at one time. All M2s are single stroke advance.

Leica M8

The Leica M8 is the first digital camera in the rangefinder M series introduced by Leica Camera AG on 14 September 2006. It uses an APS-H 10.3-megapixel Kodak KAF-10500 CCD image sensor.

As of 15 July 2011, the most recent firmware version is 2.014.

Features

The M8 body is slightly thicker than the classic MP and M7 (approximately ~14% thicker). It is an all-metal body made of a high-strength magnesium alloy. The top and base plates are cut from brass billets, before receiving a black or silver chrome finish.

The M8 supports all existing Leica M-mount lenses, however some older models might not offer all the functions due to mismatching cams. All lenses are multiplied by a 1.33x crop factor, hence a 28mm lens will act approximately like a 35mm when mounted to the M8. Because the sensor lacks an infrared filter, an IR-cut filter in front of the lens is recommended. In addition, Leica chooses to omit the Anti-Alias filter, citing the reason for higher resolution power of the lens. However, the moiré artifacts can occur in scenes with closely spaced geometric patterns, such as fabric or mesh, distant buildings, balcony railings, corrugated roofing etc.