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Glossary of Leica Terms

The widespread use of abbreviations and proprietary terminology in Leica-related documentation can be puzzling, so hopefully this inventory of definitions will help to clarify the meaning of particular terms. If you are looking for information on serial numbers, these can be readily found, for example, in the Leica Wiki or in Erwin Puts' Leica Compendium. The 2011-edition of the latter sold out quickly, but can sometimes be found on ebay, while a soft copy (without illustrations) of Puts' earlier Leica Lens Compendium is available as a free pdf-download on a separate page of this site.

A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

A

APO-Telyt:
leica apo telyt r module 2.8 400mm
Leica APO-Telyt-R Module 2.8/400mm
The designation APO-Telyt describes a line of apochromatically-corrected telephoto lenses first introduced in 1975 with the APO-Telyt-R 3.4/180mm. All optics in this series were produced for the now discontinued R-mount, with the exception of the APO-Telyt-M 3.4/135mm. The latter is currently the longest focal length available for the M-series rangefinder system. The lens family includes such highly acclaimed optics as the APO-Telyt-R 4/280 or the APO-Telyt-R Module system. It also contains two exotic lenses – the APO-Telyt-R 5/600mm and the APO-Telyt-R 5.6/1600mm – of which only one or two copies are known to exist. Despite being manual focus only lenses, the APO-Telyts have kept their value and continue to trade at premium prices on the pre-owned market.
Auction Madness:
Leica Auction Madness is a casual expression that captures the extraordinary success of Leica vintage equipment sales a major auction houses. Leica lots regularly beat expert estimations and sell for five, six or even seven figure US-dollar amounts. The strong interest from collectors is fuelled by Leica's long history of small batch manufacturing, the use of exquisite materials and premium craftsmanship. – More on Leica auctions.

B

Barnack, Oskar (1879-1936):
oskar barnack
Oskar Barnack, 1934[leica-camera.com]
Oskar Barnack was a master mechanic, who designed the first Leica camera and developed the 35mm film standard. He worked at Carl Zeiss in Jena and in 1910 moved to Ernst Leitz in Wetzlar as head of microscope development. Barnack was fascinated by the emerging movie industry and himself an amateur photographer. However, due to suffering from asthma, he struggled to transport and handle the heavy and bulky plate-camera equipment and, thus, went about developing an imaging system that would be easier to handle. Barnack's idea was to replace the large and cumbersome photographic plates of the time with small commonly-available movie-film that would subsequently be enlarged in the darkroom. The resulting compact and portable camera (the Leitz Prototype I or Ur-Leica of 1913/14) made it possible for photographers to work in ordinary outdoor settings with available light and without necessarily attracting attention to themselves. Also, the camera utilized the relatively inexpensive motion picture film, such that twelve pictures now could be taken for the costs of a single 5 x 7 plate, and 40 exposures could be made in a single loading. The outbreak of World War I and its aftermath prevented the Barnack-design to be marketed to the public for several years, but when the Leica I was launched in 1925, it became a commercial success and established the 35mm film format as the standard for photographic imaging.

C

C11:
Designation for the only Leica camera for the APS-format.
CL:
The Leica CL was a compact viewfinder film camera ("Compact Leica") with M-bayonet that was produced in cooperation with Minolta during 1973-76. The CL had a different rangefinder than the M-cameras that was less precise and less suitable to focusing fast or long lenses. Leica released two optics specifically designed for use with the CL: the Leitz Summicron-C 40mm f/2 and the Leitz Elmar-C 90mm f/4. Both lenses can be mounted also on a regular M-body, but Leica did not recommend to do so, because the coupling cams are different. About 65,000 CLs were produced and sold.
CM:
Designation of enthusiast compact film cameras, produced during 2003-07, with a Summarit fixed or zoom lens that succeeded the Minilux series with a more classic design ("Classic Minilux").
CS:
Designation of (Leica S) lenses that have a Central Shutter mechanism.

D

Digilux:
Designation for a series of digital cameras with moderate zoom or interchangeable (FourThirds) lenses.
DMR (Digital-Modul-R):
Leica DMR
Leica DMR
The Leica Digital-Modul-R is a clip-on camera back that makes digital photo capture possible with the R8 and R9 SLR cameras. It became available in June 2005. The DMR consists of two parts: the digital back, which replaces the camera's backdoor, and the power unit. The DMR was designed and manufactured by Leica in cooperation with Denmark-based Imacon. It uses a 10 megapixel sensor developed by Kodak that is 26.4mm wide and 17.6mm high, which gives rise to a format factor of 1.37. The sensor does not have an anti-aliasing filter, so that it can capture very sharp and detailed images. The DMR turns the Leica R8 and R9 into the only hybrid film and digital 35mm cameras available on the market. About 2,200 units of the DMR were produced and sold before the digital back was discontinued in 2007. – More on the Digital-Modul-R.

E

ELCAN:
ELCAN is the abbreviation for Ernst Leitz CANada, which from 1952 to 1990 was the North American subsidiary of Leica (now part of Raytheon) with a design and production facility in Midland/Ontario. ELCAN focused on specialty optical instruments for the military. Several high performance M-mount and R-mount lenses bearing the ELCAN designation were produced in small numbers, which nowadays makes them sought after collector's items.
Ernst Leitz:
Ernst Leitz
Ernst Leitz I (left) and II[ernst-leitz.com]
Ernst Leitz (1843-1920) was an entrepreneur and founder in 1869 of Ernst Leitz Optische Werke in Wetzlar/Germany, which he turned into one of the world's most prominent producers of microscopes. After his death in 1920, his son, Ernst Leitz II (1870-1956), succeeded him as company head and expanded the firm's activities into photographic equipment production, based on the camera and lens designs of his chief engineers, Oskar Barnack and Max Berek. In 1925, he successfully launched the Leica I, which started a new era of compact and convenient photography based around the 35mm film format. After the death of Ernst Leitz II, his sons Ludwig, Ernst III (1906-79), and Günther assumed senior management positions in the company. The latter underwent several mergers and name changes since the 1980s, which included the formation of the Leica Group in 1990, which was split up into Leica Geosystems (precision measurement tools), Leica Microsystems (microscopes), and Leica Camera (photography equipment) in 1996/97. At the time of the de-merger, Leica Camera went public by listing on the Frankfurt stock exchange.
Extender:
Extender is Leica's term for its tele-converters. The company produced one 1.4x and two 2x converters for its R-system that extend the focal length of the lens to which the converter is attached, respectively, by 40 percent and 100 percent, while reducing the maximum aperture by one or two stops. The two newest of the Extenders carry the APO-prefix, indicating that they are optimized for combination with apochromatically corrected tele-lenses. – More on the Leica Extenders.

F

Family Tree:
Leica Stammbaum
The Leica Stammbaum in Solms, 2013[gmpphoto]
The Leica "Stammbaum" or family tree was an iconic display of Leica cameras that used to greet visitors at the entrance of the company's headquarters in Solms. The tree-like arrangement retraced photographic equipment history from the Ur-Leica of 1914 to the era of digital M-cameras one hundred years later. It showcased all the rangefinder and reflex camera models that Leica produced over time. Representations of the family tree were printed in Leica product catalogs or could be purchased as laminated posters. When Leica moved to its new headquarters in Wetzlar in 2013, it was decided to display the historic camera models individually in the company museum. At that time, the tree-structure was acquired and re-populated for presentation in the Leica Store Manchester, before being sold at a Christie's auction in September 2016 for £360,000. – More on the Leica Family Tree.
Five-letter codes ("Bestellworte"):
Five-letter codes were pronounceable telegraphic letter combinations that used to be assigned for identification to each Leica product during 1928-60. For example, "ATOOH" refered to the Leica IIIb, "HIKOO" to the Hektor 2.5/12.5cm, and "LEICA" to the Leica I, model A. Since then, Leica has been using numerical five-digit product identification codes. The full list of the five-letter codes is available as part of the leica-wiki on the l-camera-forum.

H

Hektor:
Designation for a group of lenses produced between 1930 and 1955. According to historical anecdote, the first lens of its type was named after Oskar Barnack's dog.
Hologon:
The Hologon 15mm f/8 was an ultra wide-angle lens produced by Carl Zeiss for the Leica M-system (Leica order number 11003). It was produced from 1972 to 1976 and came with a dedicated viewfinder, as well as a neutral density filter that made it possible to stop the fixed-aperture lens down to f/16. The Hologon provided a previously unavailable angle of view of 110°, which opened up new creative experiences for Leica M-shooters. Only about 500 Hologons for Leica-M were produced, which makes the lens one of the most desirable collectible optics today.
Ultra wide-angles for Leica-M
Lens designation Front
Filter
(type)
Lens
Dimensions
(DxL, mm)
Lens
Weight
(g)
Launch
Date
(year)
Prod.
Stop
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Voigtlander Hyper Wide Heliar 10mm f/5.6 no 68 x 59 312 2016 no 1099 latest check
Voigtlander Ultra Wide Heliar 12mm f/5.6 E67 75 x 43 230 2016 no 699 latest check
Zeiss Distagon T* 15mm f/2.8 ZM E72 78 x 92 550 2016 no 4695 latest check
Voigtlander Super Wide Heliar 15mm f/4.5 E58 65 x 55 247 2016 no 749 latest check
Zeiss Hologon 15mm f/8 no 59 x 6 110 1972 1976 $$$ discontinued check
Leica Tri-Elmar-M 16mm-18mm-21mm f/4 ASPH E67 54 x 62 335 2006 no 5395 latest check
Leica Super-Elmar-M 18mm f/3.8 ASPH E77 61 x 58 310 2009 no 2995 latest check
Zeiss Distagon T* 18mm f/4 ZM E58 65 x 71 350 2003 no 1495 latest check
Leica Summilux-M 21mm f/1.4 ASPH S8 70 x 66 580 2008 no 7495 latest check
Voigtlander Ultron 21mm f/1.8 E58 69 x 92 412 2012 no 1099 latest check
Leica Elmarit-M 21mm f/2.8 E49/E60 62 x 47 290 1980 1997 $$ discontinued check
Leica Elmarit-M 21mm f/2.8 ASPH E55 58 x 46 415 1997 2010 $$ discontinued check
Zeiss Biogon T* 21mm f/2.8 ZM E46 53 x 75 280 2003 no 1495 latest check
Leica Super-Angulon 21mm f/3.4 S7/E48 53 x 51 301 1963 1976 $$ discontinued check
Leica Super-Elmar-M 21mm f/3.4 ASPH E46 54 x 43 279 2011 no 2995 latest check
Leitz Super-Angulon f= 2.1 cm f/4 A42/E39 27 x 51 250 1958 1981 $$ discontinued check
Voigtlander Color Skopar P-Typ 21mm f/4 E39 55 x 25 136 2003 no 449 latest check
Zeiss C Biogon T* 21mm f/4.5 ZM E46 53 x 56 210 2010 2016 1295 discontinued check

L

Leica:
Leica is a brand name derived from the founder's company name "Leitz(sche) Camera". It was initially only used for cameras, while lenses and accessories bore the Leitz/Wetzlar label. In 1986, the founding family changed the legal form of the enterprise from a privately held firm to a limited liability company, Leica GmbH, and sold its controling stake to outside investors. The headquarters and camera production was subsequently moved from Wetzlar to a new facility in nearby Solms. Since then, all the company's products have been branded as "Leica".
Leicaflex:
The Leicaflex was Leica's first single lens reflex camera, released in 1964. It was a very solid, fully manual SLR with an exceptionally bright viewfinder. However, technologically it was lagging behind the competition of the time. Its successors, the Leicaflex SL and Leicaflex SL2, addressed some of the shortcomings by adding a fully-focusing viewscreen, TTL-metering, and a hotshoe. Yet, Leica ultimately replaced the Leicaflexes in favor of the R3 that it had developed in cooperation with Minolta. – More on Leicaflex and R-system cameras.
Headline specifications of Leicaflex cameras
Camera
Shutter
(1/sec)
TTL-
metering
Hot-
shoe
Size
(mm)
Weight
(g)
Prod
run
Prod
period
Price
range ($)
ebay
offers
Leicaflex2000NoNo148 x 97 x 57770~32,5001964 - 68200-400check
Leicaflex SL2000selectiveNo148 x 97 x 57770~75,0001968 - 74125-250check
Leicaflex SL22000selectiveYes148 x 97 x 57770~25,0001974 - 76400-600check
Lens names:
Selected lens names
Lens designationMaximum aperture
Noctilux0.95-1.2
Nocticron1.2
Summilux1.4
Summicron2.0
Summarit2.5
Elmarit2.8
Elmar2.8-4.5
All Leica lenses are labelled with trademarked names alongside their description by maximum aperture and focal length. While originally these designations were sometimes related to the origin or optical design of the particular lens, they nowadays only refer to groups of optics that share the same maximum aperture opening. The lens names are sometimes qualified with prefixes, such as "APO-", indicating apo-chromatic correction, "Tele-", to describe long focal length, or "Vario-", to identify a zoom lens. Some deprecated lens names of older lenses did not follow this aperture-centered categorization, though. For example, "Telyt" lenses are characterized by their long focal length rather than a particular lens speed. Since only a few other camera makers (e.g. Voigtländer, Zeiss) have a similar lens-designation scheme, the lens names have contributed to the differentiation of the Leica brand as a special and perhaps more "personal" photographic tool.
LTM (Leica Thread Mount):
LTM is a screw mount to attach 35mm lenses to camera bodies with a width of 39mm and a thread of 0.977mm per turn. Leica introduced the LTM with its Leica II rangefinder camera in 1932. LTM lenses have a flange-focal-distance of 28.8 mm. Adapters make it possible to use LTM-lenses on M-mount cameras while maintaining infinity focus and rangefinder coupling.

M

M-mount:
leica m mount patent
Drawing from the M-mount patent filing
The M-mount is a bayonet-style camera-lens coupling mechanism that was introduced with the Leica M3 rangefinder camera in 1954 and has been used on all subsequent Leica M series cameras, as well as the Minolta CLE, Konica Hexar RF, Voigtländer Bessa, Rollei 35RF, and (the latest) Zeiss Ikon. The patent for the M-bayonet ("Bajonettvorrichtung für die lösbare Verbindung zweier Kamerateile") was registered by Ernst Leitz GmbH at the German patent office on 10 February 1950 and published on 23 October 1952 (patent number DE853384). Hugo Wehrenfennig was credited with the invention. The bayonet has a diameter of 44mm and a relatively short flange-focal distance of 27.8mm, so that many other lenses, such as Leica R or LTM, can be mounted on an M-mount camera via corresponding adapters. The M-mount features four tabs and a connector that transmits the focusing distance of the lens to the optical rangefinder in the camera. The newer version of the M-mount that was introduced with the Leica M8 also has six-bit markings on the flange that provide the camera with information on the lens that is being attached, so as to enable digital corrections of lens-specific imaging flaws. – More on Leica M lenses.
Max Berek:
Max Berek (1886-1949) was a minerologist and mathematicien, who joined Ernst Leitz Optische Werke in 1912 and became the head of microscope development. He also designed the first lenses for the company's new 35mm cameras. In particular, he calculated the Elmax 50mm f/3.5 lens for the Ur-Leica, with "Elmax" being an abbreviation for "Ernst Leitz Max Berek".
Minilux:
Designation of enthusiast compact film cameras, produced during 1995-03, with a Summarit fixed or zoom ("Minilux Zoom") lens.
MP:
Designation of all-mechanical rangefinder cameras ("Mechanical Perfection") in the M-series.

N

Nocticron:
Designation for lenses with a maximum aperture of 1:1.2, first introduced with the Leica DG Nocticron 1,2 / 42,5 mm.

O

Ocular To-R:
The Leica Ocular To-R is an adapter that makes it possible to use R-system lenses as telescopes. It attaches to Leica R-lenses via the bayonet mount. The Ocular contains a Schmidt-Pechan-prism that rotates the image by 180°, so that the latter appears upright and correctly sided. The Ocular has an eyepiece with a focal length of 12.5mm. Focus is achieved via the focusing mechanism of the lens. – More on the Leica Ocular To-R.

P

PA-Curtagon:
Designation for a 1:4/35mm shift lens ("Perspective Adjustment") produced by Schneider-Kreuznach for the Leica R-system.
PC-Super-Angulon:
Designation for a 1:2.8/28mm shift lens ("Perspective Control") produced by Schneider-Kreuznach for the Leica R-system.
Pradovit:
Designation of Leica's series of slide film projectors.

R

Red Dot:
leica red dot
The Red Dot is being put in its place[leica-camera.com]
The term "Red Dot" denotes the small, red, circular branding logo on (many) Leica cameras. The adhesive sticker has a diameter of 12mm (for the Leica M) and is placed into a dedicated pit. It will usually be destroyed upon removal. In case you damage or lose your camera's red dot, Leica will be happy to sell you a replacement sticker (SKU: 710 271 000 000). Alternatively, one can also procure black logo stickers from specialized vendors, such as dagcamera.com, that make the camera more discrete. In casual terms, the expression "red dot" denotes the branding power that Leica has developed over time. For example, the D-Lux and V-Lux series are technically largely identical to corresponding cameras from Panasonic, but the Leica-branding of these cameras results in a substantial price premium – both in the new and in the pre-owned market.
ROM-lenses:
ROM-lenses are lenses for Leica's R-system of SLR that are fitted with Read Only Memory chips. The latter store the characteristics of the lens for transmission to and use by the R8 or R9 cameras. In particular, these cameras can use the lens-specific information to correct for lens vignetting (in connection with the Digital Modul-R), to adjust the zoom reflector on flash guns according to the focal length, or to correctly display aperture information if accessories, like tele-extenders, are attached to the lens. The ROM chip came with all newly sold lenses from 1996, but could also be retrofitted by Leica technicians to older lenses. – More on different Leica R-lens versions.

S

Six-bit code:
leica m 28mm 28 six bit coding
Six-bit code on Elmarit 28mm
The Six-Bit Code is a colored engraving on the flange of M-lenses that makes it possible for digital M-cameras to recognize the lens that has been mounted. Thanks to reading this code through mount-based sensors, the camera can include information on the attached lens and its focal length in EXIF data and make digital corrections for lens-specific flaws, such as color-cast or vignetting, in line with lens profiles stored in the camera's firmware. Six-bit coding was introduced for all M-lenses sold since 2006 (when the Leica M8 was launched), but many older lenses can be retrofitted with the code. The coding is realized through physical pits on the lens mount flange, which are filled with either white or black paint. The six digit binary code makes it theoretically possible to distinguish up to 64 different lenses.
Summar:
Designation for 1:2/50mm lenses during the 1930s.
Summarex:
Designation for a 1:1.5/85mm portrait lens that was produced during 1943-60.
Summaron:
Designation for some wide-angle lenses produced during 1946-1974.
Summitar:
Designation for 1:2/50mm lenses that were produced during 1939-53.
Super-Angulon:
Designation for wide-angle lenses produced by Schneider-Kreuznach for Leica cameras.

T

Thambar:
Thambar was the designation of a legentary 90mm f/2.2 soft-focus portrait lens produced by Leitz during 1935-49. The thread-mount lens is known for yielding dreamy soft skin similar to the Hollywood portraits that were popular in the 1930s. Only about 3,000 Thambars were produced, and good copies/sets continue to fetch premium prices ($3,000 to $8,000) at photography auctions. – See here for current offers on ebay.

U

Ur-Leica:
leica ur leica
The Ur-Leica[leica-camera.com]
The Ur-Leica was the prototype of the first Leica 35mm camera. It was built in 1912/13 by Oscar Barnack as a compact camera that made it possible for the photographer to capture ordinary outdoor life without carrying the heavy and cumbersome equipment typical for the time. The Ur-Leica was also the first camera that used the 24x36mm film format, which was derived from 18x24mm film then common for large theater projections. It was fitted with a 50mm lens, which later became the normal focal length for the 35mm format. After World War I, developments of the compact camera continued, leading in 1924 to 31 copies of the pre-production Leica O-Series camera, before the Leica I was introduced to the public at the Leipzig Spring Fair in 1925 and subsequently became a commercial success.
UVa:
UVa is part of the inscription on Leica-branded ultraviolet filters. The latter are intended for use in high altitude areas, where UV exposure is high. UVa filters block the nonvisible ultraviolet A-spectrum (wavelength of 400-315nm), and thereby help to reduce haziness and a blue color cast in images recorded on film. Since digital sensors are not sensitive to UV light, UVa filters have lost their color correction function in digital photography, but continue to be used as a means of lens protection. – More on Leica UVa filters.

V

Visoflex:
The Visoflex is a mirror reflex box, first released in 1951, that attaches to the lens mount of Leica rangefinders and makes it possible to work with macro or telephoto lenses. Its prism housing contains a viewscreen to judge and adjust focus, so that a rangefinder camera turns into a single lens reflex. More recently, Leica has also been using the Visoflex designation for its electronic viewfinder accessory for digital cameras.
Vulcanite:
Vulcanite is black, rubberized material that used to be applied to Leica camera bodies prior to the 1980s in order to give the surface texture and provide the photographer with a solid grip. However, over time natural oxidation and exposure to ultraviolet light can result in the deterioration of the Vulcanite cover, such that the material becomes brittle and peels off. More recent Leicas have therefore been using "leatherette" vinyl covers, which are chemically more stable, easier to replace when damaged, and less expensive to apply.

Z

Z-2X:
The Leica Z-2X was a compact film camera with a two-times Vario-Elmar 35-70mm f/4-7 zoom lens. It was produced from 1997 to 2002 in black or silver finish, and was available with or without a databack. In 2000, a Jaguar limited edition of 1000 units was produced in black and racing green with the Jaguar logo on the lower front.

Further Reading

The past fifty years of Leica photography have been dominated by the M and R-systems. The evolution of these lines of cameras (and the ancestors) is graphically illustrated in the Leica family tree. Descriptions of the advances made with each new camera model are contained, respectively, in the Leica M compendium and the Leica R compendium. Last, but not least, much of the attraction of Leica for photographers is due to the excellent quality of the company's lenses, and you can get an overview of all the options and specs by checking out the M lens catalog or the R lens catalog on this site.