The L-Mount has an inner diameter of 51.6 mm[1] and a flange depth of 20.0 mm.[2] The L-mount exists in two versions, an APS-C version (TL) and a full-frame version (SL). The two versions are mechanically and electronically compatible. TL lenses mounted on full-frame cameras will cause the camera to use a crop mode from the center of the sensor, corresponding to the APS-C coverage of the lens. SL lenses mounted on TL cameras function normally, providing a 1.5x crop field of view, as is typical with APS-C cameras.
In 2018 Leica formed the L-Mount Alliance, licensing Sigma, Panasonic in the same year, to use an upgraded version of the mount for their own products, opening the way for a more extensive system of fully compatible cameras and lenses.[3]
It was introduced in April 2014 with the Leica T (Typ 701) camera. At the time of introduction, it was called the "T-mount", but this was changed to "L-mount" with the release of the Leica SL, a full-frame sensor camera using the same mount. The Leica T was renamed to the Leica TL at this time,[8] to permit marketing clarity for the L-mount lens line: TL lenses would cover APS-C sensors, while SL lenses would cover full-frame sensors.
The mount is used by the Leica TL (discontinued), TL2, Leica CL (2017) and Leica SL systems. The L-Mount is a registered trademark of Leica Camera AG.
Leica T (701), the first L-Mount cameraKazuto Yamaki (Sigma), Andreas Kaufmann (Leica Camera) and Junichiro Kitagawa (Panasonic) after the announcement of the L-Mount Alliance on 25 September 2018 at photokina in ColognePanasonic Lumix S1R with prime lens 50 mm f/1.4 at photokina in September 2018
On 25 September 2018, the L-Mount Alliance between Leica, Panasonic and Sigma was announced, enabling the partners "to make use of the L-Mount standard developed by Leica for their own developments and to offer both cameras and lenses utilising this lens mount" with full compatibility between the three companies' products.[9]
According to Sigma CEO, Kazuto Yamaki, the "L-mount system is not exactly the same as the existing one. We updated it a little bit to work better with such lenses through lens adapters."[3]
On the same day, Panasonic announced its S1R and S1 full-frame L-Mount cameras and three L-Mount lenses, with seven more lenses to be launched by 2020.[10][3]
Sigma announced that it will launch a full-frame camera in 2019, using the L-Mount and the company's Foveon sensor, as well as a range of L-mount lenses and adapters for Sigma SA and Canon EF lenses.[11]
Six cameras and 39 native lenses are confirmed for the L-Mount by 2020.
Cameras
APS-C
Leica T/TL cameras use APS-C sensors. The TL mount version is not dust- or splashproof.
Leica has an existing range of fifteen L-Mount lenses.[19]
Panasonic committed to releasing a total of ten lenses for the L-mount by the end of 2020, beginning with the 50mm F/1.4 prime and the two zooms listed below; stating that they would provide details at Photokina 2019. [20]
Sigma plans to release a wide range of lenses. 14 primes from Sigma's 'Global Vision' range, primarily designed for reflex cameras with short flange depths and currently available for the mirrorless Sony E-mount, will also be released in L-Mount from 2019.[3][21] These will be followed by a range designed specifically for mirrorless parameters.
Manual third-party lenses are being produced in L-mount by Irix Cine, 7Artisans (Photoelectric series), Meyer-Optik (Görlitz series), and Kipon HandeVision (IBELUX and IBERIT series').[citation needed]
The Four Thirds System is a standard created by Olympus and Eastman Kodak for digital single-lens reflex camera (DSLR) and mirrorless camera design and development.
Sigma Corporation is a Japanese company, manufacturing cameras, lenses, flashes and other photographic accessories. All Sigma products are produced in the company's own Aizu factory in Bandai, Fukushima, Japan. Although Sigma produces several camera models, the company is best known for producing high-quality lenses and other accessories that are compatible with the cameras produced by other companies.
The Leica Digilux 1 is a digital camera developed in partnership with Panasonic, which was released in 2002, roughly the same time as the Canon PowerShot G2 and the Nikon 2000. It is the second of Leica's digital offerings. Where the original Digilux was developed in partnership with Fuji Camera, the Digilux 1 was developed jointly with Panasonic; Leica is responsible for optics, while Panasonic designs the camera electronics. According to Leica, this allows both companies to design cameras that creates a harmonious matching of lens to sensor to produce color and contrast to Leica standards.
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Panasonic Lumix DMC-FX77 is a digital camera by Panasonic Lumix. The highest-resolution pictures it records is 14.1 megapixels, through its 24mm Ultra Wide-Angle Leica DC VARIO-SUMMICRON.
The name Summicron is used by Leica to designate camera lenses that have a maximum aperture of f/2 after 1953 and to present day.
The Leica SL is a full-frame mirrorless interchangeable-lens camera announced by Leica Camera AG on 20 October 2015. The SL was promoted as a camera system for professional applications. Beside the Leica S-System, the Leica SL-System was the 2nd professional camera system in the company's product portfolio.
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The Panasonic Leica D Vario-Elmarit 14-50mm F2.8-3.5 ASPH Mega OIS is an interchangeable camera lens announced by Panasonic on February 26, 2006. It was the first Leica lens with optical image stabilisation.
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