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What kind of mount do I have?

Hard to find out, what type of mount has your old vintage lens? Here is a little help, in ABC order (name / type / flange focal distance):




Altix was a series of sophisticated 35mm viewfinder cameras, made by Eho-Altissa and its successors in Dresden, Germany, from 1938 onwards. Later models have interchangeable lenses.The Altix-NB is the last model built by Altissa in 1958-59 before the merger of several small factories into the huge Kombinat VEB Pentacon. Learn more on

Arri PL



Arri PL is a lens mount developed by Arri for use with both 16 mm and 35 mm motion picture cameras. The PL stands for "positive lock". It is the successor mount to the Arri bayonet; however, unlike the bayonet mount, it is incompatible with older Arri-mount lenses, due to the larger diameter. (This can be rectified with an adapter relatively easily, as the flange focal distance is identical.) Learn more on


screw mount


A C mount is a type of lens mount commonly found on 16 mm motion picture cameras, closed-circuit television cameras, machine vision cameras and microscope phototubes. C-mount lenses provide a male thread, which mates with a female thread on the camera. Learn more on

Canon EF (EOS)



Introduced in 1987, the EF lens mount is the standard lens mount on the Canon EOS family of SLR film and digital cameras. EF stands for "Electro-Focus": automatic focus on EF lenses is operated by a dedicated electric motor built into the lens. Mechanically, it is a bayonet-style mount, and all communication between the camera and lens takes place through electronic contacts; there are no mechanical levers or plungers. Learn more on

Canon EF-M (EOS-M)



The Canon EF-M lens mount introduced in 2012, is a derivative of the Canon EF lens mount designed for use with the Canon EOS M mirrorless interchangeable-lens camera. It has an 18 mm flange focal distance (compared to 44 mm for EF and EF-S) and a 47 mm throat diameter (compared to 54 mm for EF and EF-S). As it was designed for use with an APS-C-sized image sensor, it features the same crop factor (of roughly 1.6) as the existing EF-S lens mount. It allows the use of Canon EF and EF-S lenses with a Canon-made adapter, but it is not backwards-compatible with Canon's existing DSLR cameras. Learn more on

Canon FD (FL)

bayonet / breech-lock


The Canon FD lens mount is a physical standard for connecting a photographic lens to a 35mm single-lens reflex camera body. The standard was developed by Canon of Japan and was introduced in March 1971 with the Canon F-1 camera. It served as the Canon SLR interchangeable lens mounting system until the 1987 introduction of the Canon EOS series cameras, which use the newer EF lens mount. The FD mount lingered through the release of the 1990 Canon T60, the last camera introduced in the FD series, and the end of the Canon New F-1 product cycle in 1992. Learn more on

Contax/Yashica C/Y



The CONTAX name was revived in 1975 (noted officially it was named "CONTAX" by Yashica/Kyocera, instead of "Contax") after the production of the Contax rangefinder cameras ended in Stuttgart more than a decade before. Like the first attempt at forging an alliance with Pentax, Zeiss designed a new common lens mount, known as CONTAX/Yashica mount (C/Y) to be used on cameras bearing both labels. Learn more on

Contax G



The G Series was a unique 35 mm autofocus rangefinder system with interchangeable lenses. Rather than displaying a typical rangefinder focusing patch and brightlines, the first G1 had a zooming viewfinder with a focus confirmation light activated by the autofocus system if manual focus was required. The actual AF system, unlike AF for SLR cameras, used a twin-window rangefinder, but the alignment determination was electronic. Learn more on




The Exakta was a camera produced by the Ihagee Kamerawerk in Dresden, Germany, founded as the Industrie und Handels-Gesellschaft mbH in 1912. The inspiration and design of both the VP Exakta and the Kine Exakta are the work of the Ihagee engineer Karl Nüchterlein (see Richard Hummel's Spiegelreflexkameras aus Dresden), who did not survive the Second World War. Learn more on

Fujifilm X



The Fujifilm X-mount is a type of interchangeable lens mount designed by Fujifilm for use in those cameras in their X-series line that have interchangeable lenses. These lenses are designed for 23.6mm x 15.6mm APS-C sensors. Learn more on

L39 (rangefinder)

screw mount


The M39 lens mount is a screw thread mounting system for attaching lenses to 35 mm cameras, predominately rangefinder (RF) Leicas. It is also the most common mount for Photographic enlarger lenses. Learn more on

Leica M



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, Konica, Cosina Voigtländer, Rollei, Carl Zeiss AG and Rollei Fototechnic on some of their cameras. Learn more on

Konica F



The Konica F (shown above with 52mm f/1.4 Hexanon lens) is one of the most sought-after and legendary of all classic 35mm SLRs. It was a groundbreaking camera in its day and the very first Konica 35mm SLR. The F was produced in very small quantity, estimated between 600 and 1500. Learn more on

Konica AR



The Konica AR camera lens mount was introduced in 1965 with the Konica Autoreflex (Autorex in Japan market), together with a range of lenses. It features a comparably short flange focal distance of 40.50 mm for a 35 mm film SLR camera. Konica produced cameras for Konica AR bayonet until 1988. Learn more on

M39 (SLR)

screw mount


The above Zenit was based on the Zorki rangefinder camera (a copy of the Leica II). In transforming the Zorki into an SLR, the simplest approach was taken: the rangefinder housing was removed from the top and replaced by a plain ground-glass screen and prism; a mirror was added below, with a rope-and-pulley setting system and the M39×1 thread mount was pushed forward to make room for the mirror inside. Learn more on


screw mount


The M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. It is more accurately known as the M42 × 1 mm standard, which means that it is a metric screw thread of 42 mm diameter and 1 mm thread pitch. (The M42 lens mount should not be confused with the T-mount, which shares the 42mm throat diameter, but differs by having a 0.75mm thread pitch.) It was first used in Zeiss' Contax S of 1949; this East German branch of Zeiss also sold cameras under the Pentacon name; after merger with other East German photographic manufacturers, the name Praktica was used. M42 thread mount cameras first became well known under the Praktica brand, and thus the M42 mount is known as the Praktica thread mount. Since there were no proprietary elements to the M42 mount, many other manufacturers used it; this has led to it being called the Universal thread mount or Universal screw mount by many. The M42 mount was popularized in the United States by Pentax; thus, it is also known as the Pentax thread mount, despite the fact that Pentax did not originate it. Learn more on

Mamiya 645/Phase one



The Mamiya M645 is the first series of 4.5×6 SLRs made by Mamiya. The finder and screens are interchangeable, but there is no magazine back, only preloadable film inserts. All the M645 models share the same accessories (finders, screens, lenses, grips and inserts). The lenses and inserts can also be attached on the later Mamiya 645 models. Learn more on CameraPedia...

Mamiya ZE



The Mamiya ZE was introduced in 1980, as a very promising small film system, but unfortunately it has met an early fate. Find out more in this article.

Micro 4/3



The Micro Four Thirds system (MFT or M4/3) is a standard released by Olympus and Panasonic in 2008, for the design and development of mirrorless interchangeable lens digital cameras, camcorders and lenses. Camera bodies are available from Blackmagic, DJI, JVC, Kodak, Olympus, Panasonic, and Xiaomi. MFT lenses are produced by Cosina Voigtländer, DJI, Kowa, Kodak, Mitakon, Olympus, Panasonic, Samyang, Sigma, SLR Magic, Tamron, Tokina, Veydra, and Xiaomi, amongst others. Learn more on

Minolta SR/MD/MC



The Minolta SR-mount was the bayonet mounting system used in all 35mm SLR cameras made by Minolta with interchangeable manual focusing lenses. Several iterations of the mounting were produced over the decades, and as a result, the mount itself was sometimes referred to by the name of the corresponding lens generation (f.e. "MC", "MD" or "X-600") instead. Learn more on

Nikon 1



The Nikon 1-mount is a type of interchangeable lens mount developed by Nikon for its Nikon CX format mirrorless interchangeable-lens cameras. The 1-mount was first introduced on the Nikon 1 series in 2011, and features a bayonet mount. Learn more on

Nikon F



The Nikon F-mount is a type of interchangeable lens mount developed by Nikon for its 35mm format Single-lens reflex cameras. The F-mount was first introduced on the Nikon F camera in 1959, and features a three-lug bayonet mount with a 44 mm throat and a flange to focal plane distance of 46.5 mm. The company continues to use variations of the same lens mount specification for its film and digital SLR cameras. Learn more on

Olympus OM



The Olympus OM System (O = Olympus, M = Maitani) was a line of 35mm single-lens reflex cameras, lenses and accessories sold by Olympus between 1972 and 2002 (some accessories were sold until early 2003). Learn more on

Pentacon Six (P6)



The Pentacon Six mount (commonly abbreviated to P6, or Б in Cyrillic) is a breech-lock bayonet lens mount originally used by several medium format single-lens reflex cameras from East Germany. The lens mount was originally designed by Carl Zeiss Jena and Kamera Werkstätten (KW) for the Praktisix camera. KW later merged with several other companies to become VEB Pentacon; the Praktisix was improved and renamed the Pentacon Six. This camera was manufactured for a much longer time (almost 40 years) and exported widely; hence the lens mount became associated most with the Pentacon Six name, rather than the original Praktisix. Learn more on

Pentax 110



The Pentax Auto 110 and Pentax Auto 110 Super are single-lens reflex cameras made by Asahi Pentax that use Kodak's 110 film cartridge. The Auto 110 was introduced with three interchangeable lenses in 1978. Three more lenses were introduced in 1981, and then the Super model was released in 1982. The camera system was sold until 1985. The complete system is sometimes known as the Pentax System 10, apparently for its official Pentax name, although most Pentax advertising only uses the camera name or Pentax-110. This model represented the only complete ultraminiature SLR system manufactured for the 110 film format, although several fixed-lens 110 SLRs were sold. The camera system also claims to be the smallest interchangeable-lens SLR system ever created. Learn more on

Pentax 645



The Pentax 645 is a medium format single-lens reflex system camera manufactured by Pentax. It was introduced in 1984, along with a complementary line of lenses. It captures images nominally 6 cm × 4.5 cm on 120, 220, and 70 mm film, though the actual size of the images is 56 mm × 41.5 mm. Learn more on

Pentax K (PK)



The Pentax K-mount, sometimes referred to as the "PK-mount", is a bayonet lens mount standard for mounting interchangeable photographic lenses to 35 mm single-lens reflex (SLR) cameras. It was created by Pentax in 1975, and has since been used by all Pentax 35 mm and digital SLRs (with the exception of the medium format 645D and 645z), as well as the MILC Pentax K-01. A number of other manufacturers have also produced many K-mount lenses and K-mount cameras. Learn more on

Praktica B (PB)



Praktica is a brand manufactured by Pentacon in Dresden in eastern Germany, formerly in the GDR (prior to German reunification in 1990). Pentacon is the modern-day successor to Dresden camera firms such as Zeiss Ikon; for many years Dresden was the world's largest producer of cameras. Currently Praktica is the only brand sold by the company; previous brands of the predecessor firms included Zeiss Ikon, Contax (now owned by the Carl Zeiss company), Ica, Ernemann, Exakta, Praktiflex, Pentacon and more. Learn more on

Sony E (NEX)



The E-mount is a lens mount designed by Sony for their NEX ("New E-mount eXperience") and ILCE series of camcorders and mirrorless cameras. The E-mount supplements Sony's A-mount allowing the company to develop more compact imaging devices while maintaining compatibility with 35mm sensors. E-mount achieves this by: minimizing mechanical complexity, removing mechanical aperture and focus drive; shortening the flange focal distance to 18 mm compared to earlier offerings from Sony which used 44.5 mm; reducing the radius of the flange. Learn more on

Sony/Minolta A



The Minolta A-mount camera system was a line of photographic equipment from Minolta. The system used a lens mount called A-mount, with a flange focal distance 44.50 mm. The new mount was larger than the older SR-mount making old manual lenses incompatible with the new system. The mount is now used by Sony, who bought the SLR camera division from Konica Minolta, Konica and Minolta having merged a few years before. Learn more on


screw mount


The T-mount is a standard lens mount for cameras and other optical assemblies. The usual T-mount is a screw mount using a male 42×0.75 (42 mm diameter, 0.75 mm thread pitch) metric thread on the lens with a flange focal distance of 55 mm and a mating female 42mm thread on a camera adapter or other optical component. This thread form is referred to as T-thread. (This should not be confused with the M42 lens mount which is also 42 mm diameter, but has a 1 mm thread pitch. Confusingly, the T-thread is sometimes described as "M42x0.75," which is the metric manner in which to describe the thread.) Learn more on

You can find the complete compatibility chart here.

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In terms of compatibility, we distinguish four separate categories:

This means that you'll be able to apply the lens on the camera in question with a proper adapter, and full focus range will be available with it (often with aperture control too). If AF is supported, you'll see it in the description.
This means that due to the flange focal depth or other factor this conversion would be normally unfeasible, but with some compromises (e.g. using a speedbooster adapter) can be made possible.
This means that the flange focal depth should make mounting and using inifinty focus possible, but for some reason there are no adapter rings available or other factors make it unviable.
This means that you won't be able to mount your lens due to mechanical incompatibility or the difference in flange focal depth doesn't make inifinity focus possible. Although numerous lenses can be mounted on cameras without infinity focus, but this cannot be considered actual compatibility.

Additional information for compatible variations:

manual focus (on the lens, with its own control ring)
autofocus available (AF controlled by the camera body)
manual aperture control (on the lens, with its own control ring)
automatic aperture control (controlled by the camera body)
speedbooster (focal reducer) adapters are available
macro (variable length) adapters are available
tilt-shift (or other flexible) adapters can be used

If you'd like to read more in-depth about compatiblity, you'll need to get familiar with flange focal depth, see this article.