Editing Lens mount

{{short description|Interface between a camera body and lens}}
{{More citations needed
| date = May 2016
}}
[[File:Bajonett manual minolta.jpg|thumb|Male mount of [[List of Minolta SR-mount lenses#2nd MC generation (1972-1975/76)|Minolta MC-Rokkor]] 58mm 1:1.4 lens with female lens mount of an [[Minolta XD-7]]]]
[[File:Lens Units sold.svg|thumb|Lenses sold per year by mount type]]
A '''lens mount''' is an interface – mechanical and often also electrical – between a photographic [[camera]] body and a lens. It is a feature of camera systems where the [[System camera|body allows interchangeable lenses]], most usually the [[rangefinder camera]], [[single lens reflex]] type, single lens mirrorless type or any [[movie camera]] of [[16 mm]] or higher [[film gauge|gauge]]. Lens mounts are also used to connect optical components in instrumentation that may not involve a camera, such as the modular components used in optical laboratory prototyping which join via [[C mount|C-mount]] or [[T-mount]] elements.

== Mount types ==
A lens mount may be a screw-threaded type, a [[Bayonet#Linguistic impact|bayonet]]-type, or a [[breech-lock]] (friction lock) type. Modern still camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body.  Screw-threaded mounts are fragile and do not align the lens in a reliable rotational position, yet types such as the C-mount interface are still widely in use for other applications like video cameras and optical instrumentation.

[[Bayonet mount]]s generally have a number of tabs (often three) around the base of the lens, which fit into appropriately sized recesses in the lens mounting plate on the front of the camera. The tabs are often "keyed" in some way to ensure that the lens is inserted in only one orientation, often by making one tab a different size. Once inserted the lens is fastened by turning it a small amount. It is then locked in place by a spring-loaded pin, which can be operated to remove the lens.

Lens mounts of competing manufacturers (Sony, Nikon, Canon, Contax/Yashica, Pentax, etc.) are almost always incompatible.  In addition to the mechanical and electrical interface variations, the [[flange focal distance]] from the lens mount to the film or sensor can also be different.  Many{{Who|date=May 2016}} allege that these incompatibilities are due to the desire of manufacturers to "[[vendor lock-in|lock in]]" consumers to their brand.{{Citation needed|date = May 2016}}

In movie cameras, the two most popular mounts in current usage on professional [[digital cinematography]] cameras are [[Arri]]'s [[Arri PL|PL-mount]] and [[Panavision]]'s [[PV mount|PV-mount]]. The PL-Mount is used both on Arri and [[Red Digital Cinema Camera Company|RED]] digital cinematography cameras, which {{As of|2012|lc = y}} are the most used cameras for [[List of films shot in digital|films shot in digital]]. The Panavision mounts are exclusively used with Panavision lenses, and thus are only available on Panaflex cameras or third-party cameras "Panavised" by a Panavision rental house, whereas the PL-mount style is favored with most other cameras and [[cine lens]] manufacturers. Both of these mounts are held in place with locating pins and friction locking rings. Other mounts which are now largely historical or a minority in relation to current practices are listed below.

== List of lens mounts ==
{{sticky header}}
{| class="wikitable sortable sticky-header"
|+ |
!Mount name
![[Flange focal distance]]
![[Image sensor format|Frame size]]<!-- use the {{ntsh}} template with the diagonal in mm for sorting -->
! data-sort-type=text | Throat or thread diameter
! data-sort-type=text | Mount thread pitch
!Mount type
!Primary use
!Camera lines
|-
|Kinor 16SP
|{{nts|52}} mm<ref>{{Cite web |title=Krasnogorsk-2 lens mount |url=https://rafcamera.com/info/bayonet-mounts/krasnogorsk-2-lens-mount |access-date=2024-05-20 |website=rafcamera.com |language=en}}</ref>
|{{ntsh|12.703}}[[16 mm film|16 mm]]
|{{nts|43}} mm
|
|Breech lock
|Cinematography
|[[Kinor|Kinor 16SP]], [[Krasnogorsk (camera)|Krasnogorsk]]-1, -2, -3<ref>{{Cite web |date=2006-11-21 |title=Seeking knowledge and user experiences with the Kinor SP16 |url=https://cinematography.com/index.php?/forums/topic/18803-seeking-knowledge-and-user-experiences-with-the-kinor-sp16/ |access-date=2024-05-20 |website=Cinematography.com |language=en-US}}</ref><ref>{{Cite web |date=2010-02-07 |title=K-3 bayonet question |url=https://cinematography.com/index.php?/forums/topic/44309-k-3-bayonet-question/ |access-date=2024-05-20 |website=Cinematography.com |language=en-US}}</ref> 16mm movie cameras
|-
|Kinor 16SX
|{{nts|52}} mm<ref name=":0">{{Cite web |date=2011-01-28 |title=Kinor 16CX-2M lens mount question |url=https://cinematography.com/index.php?/forums/topic/50185-kinor-16cx-2m-lens-mount-question/ |access-date=2024-05-20 |website=Cinematography.com |language=en-US}}</ref>
|{{ntsh|12.703}}[[16 mm film|16 mm]]
|{{nts|43}} mm
|
|Breech lock
|Cinematography
|Kinor 16SX-1M,-2M 16mm movie camera
|-
|OST/OCT-19
|{{nts|68}} mm<ref name=":0" />
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|61}} mm
|
|Breech lock
|Cinematography
|[[Konvas|Konvas-2M]], Kinor-35H 35mm movie cameras
|-
|Kiev-16U
|{{nts|31}} mm<ref name=":1">{{Cite book |url=https://cameramarket.eu/data/pdf/cameramarket_Lens%20mounts%20and%20flange%20focal%20distances.pdf |title=Lens mounts and flange focal distances |pages=3}}</ref>
|{{ntsh|12.703}}[[16 mm film|16 mm]]
|{{nts|32}} mm
|{{nts|0.5}} mm
|Screw
|Cinematography
|[[Kiev 16U 16mm cine camera|Kiev-16U/UE]] 16mm movie cameras
|-
|Kiev-16C
|{{nts|17.35}} mm<ref name=":1" />
|{{ntsh|12.703}}[[16 mm film|16 mm]]
|{{nts|27}} mm
|{{nts|0.75}}mm
|Screw
|
|Kiev-1C 16mm movie camera
|-
|Canon SV
|{{nts|32.00}} mm
|
|
|
|Bayonet
|Photography (Digital)
|[[Canon (company)|Canon]] RC-701 & 760
|-
|[[Argus C3]]
|{{nts|40.3}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|34}} mm
|20 TPI
|Screw
|Photography
|[[Argus C3]]
|-
|[[Canon EX]]
|{{nts|20}} mm
|1/2"
|
|
|Bayonet
|Photography
|
|-
|[[Canon FL]]
|{{nts|42}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|48}} mm
|
|Breech lock
|Photography
|
|-
|[[Canon FD lens mount|Canon FD]]
|{{nts|42}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|48}} mm
|
|Breech lock
|Photography
|Canon [[Canon F series|F series]], [[Canon A series|A series]], and [[Canon T series|T series]] SLRs
|-
|[[Canon FD lens mount|Canon FDn]] (a.k.a. "New FD")
|{{nts|42}} mm
|[[135 film|35 mm]]
|{{nts|48}} mm
|
|Bayonet
|Photography
|completely interchangeable with earlier FD lenses
|-
|[[Canon EF lens mount|Canon EF]]
|{{nts|44.00}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|54}} mm<ref>{{cite web
| title=Camera Story – 1987–1991 EOS
| publisher=[[Canon (company)|Canon]]
| url=http://www.canon.com/camera-museum/history/canon_story/1987_1991/1987_1991.html
| access-date=2008-07-22
| archive-url=https://web.archive.org/web/20080724013410/http://www.canon.com/camera-museum/history/canon_story/1987_1991/1987_1991.html
| archive-date=2008-07-24
| url-status=dead
}}</ref>
|
|Bayonet
||Photography
|[[Canon EOS]] [[135 film|35mm film]] SLR, Full Frame & APS-H DSLR
|-
|[[Canon EF-S lens mount|Canon EF-S]]
|{{nts|44.00}} mm
|{{ntsh|26.82}}[[APS-C]]
|{{nts|54}} mm
|
|Bayonet
||Photography (Digital)
|[[Canon EOS]] [[APS-C]] DSLR
|-
|[[Canon EF-M lens mount|Canon EF-M]]
|{{nts|18}} mm
|{{ntsh|28.123}}[[APS-C]]
|{{nts|47}} mm 
|
|Bayonet
|Photography (Digital)
|[[Canon EOS]] M series Mirrorless [[APS-C]] Cameras
|-
|[[Canon RF mount|Canon RF]]
|{{nts|20}} mm
|{{ntsh|43.267}}[[135 film|35 mm]] and [[APS-C]]
|{{nts|54}} mm
|
|Bayonet
|Photography (Digital)
| [[Canon EOS]] R series full-frame and APS-C mirrorless cameras; lenses designated as RF-S are optimized for APS-C sensors, but will mount on full-frame bodies
|-
|[[Nikon S-mount|Nikon S]]
|{{nts|34.85}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|34}} mm<ref>{{cite web
| title=Debut of Nikon F
| publisher=[[Nikon (company)|Nikon]]
| url=https://imaging.nikon.com/history/chronicle/history-f/index.htm
| access-date=2024-04-14
}}</ref>
|
|Bayonet
|Photography
|[[Nikon S-mount|Nikon Rangefinder]]
|-
|[[Nikon F-mount|Nikon F]]
|{{nts|46.5}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|44}} mm<ref>{{cite web
| title=Debut of Nikon F
| publisher=[[Nikon (company)|Nikon]]
| url=https://imaging.nikon.com/history/chronicle/history-f/index.htm
| access-date=2020-10-26
| archive-url=https://web.archive.org/web/20200812162248/https://imaging.nikon.com/history/chronicle/history-f/index.htm
| archive-date=2020-08-12
| url-status=live
}}</ref>
|
|Bayonet
|Photography
|[[Nikon F-mount|Nikon F]] [[135 film|35mm film]] SLR, Full Frame & [[APS-C]] DSLR
|-
|[[Nikon 1 mount|Nikon 1]]
|{{nts|17}} mm
|13.2 x 8.8mm
|{{nts|40}} mm
|
|Bayonet
|Photography (Digital)
|[[Nikon 1 series]]
|-
|[[Nikon Z-mount|Nikon Z]]
|{{nts|16}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|55}} mm
|
|Bayonet
|Photography (Digital)
|Nikon Z - Mirrorless Full Frame & [[APS-C]]
|-
|[[Sony Mavica]]
|{{nts|57}} mm
|
|
|
|Bayonet
|Photography (Digital)
|
|-
|[[Sony E-mount|Sony E | FE]]
|{{nts|18}} mm
|{{ntsh|43.267}}[[135 film|35 mm]] and [[APS-C]]
|{{nts|46.1}} mm (1.815&nbsp;inch)
|
|Bayonet
|Photography (Digital)
|[[Sony NEX|Sony E/FE Mount Alpha Mirrorless Full Frame / APS-C| Sony NEX Mirrorless APS-C]]
|-
|[[Minolta SR-mount|Minolta SR]]
|{{nts|43.50}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|44.97}} mm
|
|Bayonet (54°)
|Photography
|[[Minolta SR mount|Minolta SR/MC/MD]]
|-
|[[Minolta Vectis S series|Minolta V]]
|{{nts|38.00}} mm
|{{ntsh|34.51}}[[Advanced Photo System|APS-H]]
|{{nts|39.7}} mm
|
|Bayonet
|Photography
|[[Minolta Vectis]]
|-
|[[Minolta A-mount|Minolta A]]
|{{nts|44.50}} mm
|{{ntsh|43.267}}[[135 film|35 mm]] and [[APS-C]]
|{{nts|49.7}} mm (1.939&nbsp;inch)
|
|Bayonet (54°)
|Photography
|Minolta DSLR AF/Alpha/Dynax/Maxxum<br>[[Sony DSLR Alpha (α) A Mount]]
|-
|[[Pentax Auto 110]]
|{{nts|27}} mm
|{{ntsh|21.401}}[[110 film]]
|{{nts|19.5}} mm
|
|Bayonet
|Photography
|Pentax Auto 110 and Auto 110 Super
|-
|[[Pentax Q]]
|{{nts|9.2}} mm
|1/2.3", 1/1.7"
|{{nts|31}} mm
|
|Bayonet
|Photography (Digital)
|
|-
|[[Pentax K mount|Pentax K]]
|{{nts|45.46}} mm
|{{ntsh|43.267}}[[135 film|35 mm]] and [[APS-C]]
|{{nts|44}} mm
|
|Bayonet
|Photography
|Used also by Ricoh, Chinon, Agfa, Vivitar and KMZ Zenit cameras
|-
|[[Leitz Visoflex I]]
|{{nts|91.3}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{ntsh|39}}[[M39 lens mount|M39]]
|26 [[Unified Thread Standard|TPI]]
|Screw
|Photography
|
|-
|[[Leitz Visoflex II]]/[[Leitz Visoflex III|III]]
|{{nts|67.8}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|44}} mm
|
|Bayonet (Leica M)
|Photography
|
|-
|[[Leica M mount|Leica M]]
|{{nts|27.80}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|44}} mm
|
|Bayonet
|Photography
|[[Leica M series]]<br>[[Leica CL]]<br>[[Minolta CLE]]
|-
|[[Leica R bayonet|Leica R]]
|{{nts|47.00}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|49}} mm
|
|Bayonet
|Photography
|
|-
|[[Leica L-Mount|Leica L]]
|{{nts|20}} mm
|{{ntsh|43.267}}[[135 film|35 mm]] and [[APS-C]]
|{{nts|51.6}} mm
|
|Bayonet
|Photography (Digital)
|L-Mount Alliance (Leica, Panasonic, Sigma, DJI and Blackmagic Design cameras)
|-
|[[Contax]] RF
|{{nts|34.85}} mm 
|{{ntsh|43.267}}[[135 film|35 mm]]
|44&nbsp;mm{{ntsh|34}}
|
|Double bayonet
|Photography
|[[Contax I]], II, III, IIa, IIIa<br>[[Kiev (brand)#Kiev 35mm rangefinders|Kiev rangefinders]]
|-
|[[Contax G]]
|{{nts|29.00}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|44}} mm
|
|Breech lock
|Photography
|
|-
|[[Contax-N|Contax N]]
|{{nts|48}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|55}} mm
|
|Bayonet
|Photography
|
|-
|Contax/Yashica
|{{nts|45.5}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|48}} mm
|
|Bayonet
|Photography
|[[Yashica]]/[[Contax]]
|-
|Yashica MA
|{{ntsh|45.8}}~45.8&nbsp;mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|
|
|Bayonet
|Photography
|Kyocera Yashica 230 AF etc.
|-
|[[Fujica X-mount|Fujica X]]
|{{nts|43.5}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|49}} mm
|
|Bayonet
|Photography
|[[Fujica-X]]
|-
|[[Fujifilm X-mount|Fujifilm X]]
|{{nts|17.7}} mm
|{{ntsh|28.123}}[[APS-C]]
|{{nts|44}} mm 
|
|Bayonet
|Photography (Digital)
|[[Fujifilm X series]] mirrorless
|-
|[[Olympus Pen F]]
|{{nts|28.95}} mm
|{{ntsh|30}}[[135 film|35 mm]] half-frame
|
|
|Bayonet
|Photography
|
|-
|[[Olympus OM]]
|{{nts|46}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|46}} mm
|
|Bayonet
|Photography
|
|-
|[[Four Thirds System|Four Thirds]]
|{{nts|38.67}} mm
|{{ntsh|21.628}}17.3&nbsp;mm × 12.98&nbsp;mm
|{{ntsh|44}}~44&nbsp;mm{{Cref|A}}
|
|Bayonet
|Photography (Digital)
|Olympus E<br>Panasonic Lumix DMC-L<br>Leica Digilux
|-
|[[Micro Four Thirds System|Micro Four Thirds]]
|{{nts|19.25}} mm
|{{ntsh|21.628}}17.3&nbsp;mm × 12.98&nbsp;mm
|{{ntsh|38}}~38&nbsp;mm{{Cref|A}}
|
|Bayonet
|Photography (Digital)
|Olympus Pen & OM-D series<br>Panasonic G, GF, GX & GH Series<br>Blackmagic Design Cinema Camera
|-
|[[KM-mount|KM]]
|{{nts|28}} mm (27.80&nbsp;mm?)
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|44}} mm
|
|Bayonet
|Photography
|[[Konica Hexar RF]]
|-
|[[Konica F-mount|Konica F]]
|{{nts|40.50}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|40}} mm
|
|Bayonet
|Photography
|[[Konica F]]
|-
|[[Konica AR-mount|Konica AR]]
|{{nts|40.50}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|47}} mm
|
|Bayonet
|Photography
|[[Konica Autoreflex]]
|-
|[[Samsung NX mini]]
|{{nts|6.95}} mm
|1"
|{{nts|38}} mm
|
|Bayonet
|photography (Digital)
|
|-
|[[Samsung NX-mount|Samsung NX]]
|{{nts|25.5}} mm
|{{ntsh|28.123}}[[APS-C]]
|{{nts|42}} mm
|
|Bayonet
|Photography (Digital)
|
|-
|[[Samsung GX-mount|Samsung Kenox]]
|{{nts|44.5}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|<!-- 49.7 mm, the same as Minolta A-mount; unconfirmed -->
|
|Bayonet
|Photography
|Manual focus only; there is only one compatible camera - [[Samsung Kenox GX-1]]/[[Samsung SR4000]].
|-
|[[DL-mount|DJI DL]]
|{{nts|16.84}} mm<ref name="DJI DL mount lenses">{{Cite web |title=DJI DL mount lenses |url=https://iso3200.org/blog/references/dl-mount-lenses/ |access-date=2024-09-09 |website=iso3200.org|language=en}}</ref>
|{{ntsh|43.267}}[[135 film|35 mm]] and [[APS-C]]
|{{nts|58}} mm<ref name="DJI DL mount lenses"/>
|
|Bayonet
|Photography (Digital), Cinematography
|For aerial drone and gimbal use; [[DJI Zenmuse X7]], [[DJI Zenmuse X9|X9]] and [[DJI Ronin 4D X9]] cameras.
|-
|[[Icarex BM]]
|{{nts|48.00}} mm
|{{ntsh| }}[[135 film|35 mm]]
|
|
|Breech lock
|Photography
|Icarex 35S
|-
|[[D mount|D]]
|{{nts|12.29}} mm
|{{ntsh|5.58}}[[8 mm film|8 mm]]
|{{nts|15.88}} mm (0.625&nbsp;inch)
|32 [[Unified Thread Standard|TPI]]
|Screw
|Cinematography
|
|-
|[[C-mount#CS mount|CS]]
|{{nts|12.52}}6&nbsp;mm<ref>{{Cite book|url=https://books.google.com/books?id=HEy4UBoGF2UC&q=cs-mount+%2212.526%22&pg=PA49|title=Handbook of Machine Vision|last=Hornberg|first=Alexander|date=2007-02-27|publisher=John Wiley & Sons|isbn=9783527610143|language=en}}</ref>
|{{ntsh|12.703}}1/3", 1/2"
|{{nts|25.40}} mm (1&nbsp;inch)
|32 [[Unified Thread Standard|TPI]]
|Screw
|Cinematography / Industrial
|
|-
|[[C-mount|C]]
|{{nts|17.526}} mm (0.69&nbsp;inches)
|{{ntsh|12.703}}1/2", [[16 mm film|16 mm]], 2/3", 1"
|{{nts|25.40}} mm (1&nbsp;inch)
|32 [[Unified Thread Standard|TPI]]
|Screw
|Cinematography / Industrial / Machine Vision
|
|-
|[[S-mount (CCTV lens)|S]] (a.k.a. M12)
|N/A. Screw mount must be adjusted manually for back focus. Back focal distance from <1mm to 12mm.
|{{ntsh|3.0}}1/6" to 1"
|12&nbsp;mm 
|0.5&nbsp;mm pitch
|Screw
|CCTV, [[Printed circuit board|PCB]]
|Edmund Optics μ-Video
|-
|[[Bolex]] Bajonet
|{{nts|23.22}} mm
|{{ntsh|12.703}}[[16 mm film|16 mm]]
|
|
|Breech lock
|Cinematography
|effective focal distance {{nts|17.526}} mm (0.69&nbsp;inches) due to beam splitter behind mount flange (accepts C-mount lenses with adapter)
|-
|[[1/3" bayonet mount]]
|{{nts|25}} mm
|[[1/3"]] ({{nts|5.24}}x2.94)
|
|
|Bayonet
|Video
|JVC professional video cameras
|-
|[[M39 lens mount|M39 (a.k.a. L-Mount, LTM)]]
|{{nts|28.80}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{ntsh|39}}[[M39 lens mount|M39]]
|26 [[Unified Thread Standard|TPI]]
|Screw
|Photography
|[[M39 lens mount|Leica M39 screw mount]]
|-
|[[Narciss]]
|{{nts|28.8}} mm
|{{ntsh|12.703}}[[16 mm film|16 mm]]
|{{ntsh|24}}M24
|1&nbsp;mm
|Screw
|Photography
|
|-
|[[1/2" bayonet mount]]
|{{nts|37.80}} mm
|[[1/2"]] ({{nts|6.97}}x3.92)
|
|
|Bayonet
|Video
|Non-Sony professional video cameras
|-
|[[Alpa]]
|{{nts|37.80}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|42}} mm
|
|Bayonet
|Photography
|
|-
|[[Sony 1/2" bayonet mount|Sony 1/2" Video]]
|{{nts|38}} mm
|[[1/2"]] ({{nts|6.97}}x3.92)
|
|
|Bayonet
|Video
|Sony professional video cameras
|-
|[[Aaton universal]]
|{{nts|40}} mm
|{{ntsh|12.703}}[[16 mm film|16 mm]]
|{{nts|50}} mm
|
|Breech lock
|Cinematography
|
|-
|Miranda bayonet/M44
|{{nts|41.5}} mm
|{{ntsh|43.267}}[[135 film|35 mm]] and [[APS-C]]
|
|
|Bayonet
|Photography
|[[Miranda Camera Company]]
|-
|[[Petriflex]]
|{{nts|43.5}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|
|
|Breech lock
|Photography
|
|-
|[[Sigma SA mount|Sigma SA]]
|{{nts|44.00}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|44}} mm
|
|Bayonet
|Photography
|[[Sigma SA mount|Sigma SA]]
|-
|[[Paxette]]
|{{nts|44}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{ntsh|39}}[[M39 lens mount|M39]]
|1&nbsp;mm
|Screw
|Photography
|
|-
|[[Praktiflex]]
|{{nts|44}} mm
|{{ntsh|44}}[[135 film|35 mm]]
|{{ntsh|40}}[[M40 lens mount|M40]]
|1&nbsp;mm
|Screw
|Photography
|
|-
|[[Praktica]]
|{{nts|44.40}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|42}} mm
|
|Bayonet
|Photography
|
|-
|[[Exakta, Topcon|Exakta, Topcon RE]]
|{{nts|44.7}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|46}} mm
|
|Bayonet
|Photography
|
|-
|[[Zenit M39]]
|{{nts|45.2}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{ntsh|39}}[[M39 lens mount|M39]]
|1&nbsp;mm
|Screw
|Photography
|
|-
|M37
|{{nts|45.46}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|37}} mm
|1&nbsp;mm
|Screw
|Photography
|[[Asahiflex]]
|-
|[[M42 lens mount|M42]]
|{{nts|45.46}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|42}} mm
|1&nbsp;mm
|Screw
|Photography
|Praktica,<ref>The M42 (Praktica) mount is sometimes referred to as a "P" thread.  See, e.g., {{cite web |url=http://www.questarcorporation.com/acc.htm#camera |title= Questar Corporation: Photographic Camera Adapters "P" Thread|author=<!--Not stated--> |access-date= 2017-03-01}}</ref> Pentax, Zenit
|-

|-
|[[B4-mount]]
|{{nts|48}} mm
|[[2/3"]] ({{nts|9.6}}x5.4)
|
|
|Bayonet
|Video
|Professional and broadcast video cameras
|-
|[[Praktina]]
|{{nts|50}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|46}} mm
|
|Breech lock
|Photography
|
|-
|T-Thread (Very earliest type)
|{{nts|50.7}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|M37
|0.75mm
|Screw
|Photography
|Tamron
|-
|Adapt-A-Matic
|{{nts|50.7}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|54}} mm
|
|Bayonet
|Photography
|Tamron
|-
|Adaptall &amp; Adaptall-2
|{{nts|50.7}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|54}} mm
|
|Bayonet
|Photography
|Tamron
|-
|[[Arri standard]]
|{{nts|52}} mm
|{{ntsh|43.267}}[[35mm movie film|35 mm]] and [[16 mm film|16 mm]]
|{{nts|64}} mm
|
|Tab lock
|Cinematography
|
|-
|[[Arri bayonet]]
|{{nts|52}} mm
|{{ntsh|43.267}}[[35 mm movie film|35 mm]] and [[16 mm film|16 mm]]
|{{nts|64}} mm
|
|Bayonet
|Cinematography
|
|-
|[[Arri PL]]
|{{nts|52}} mm
|{{ntsh|43.267}}[[35 mm movie film|35 mm]] and [[16 mm film|16 mm]]
|{{nts|54}} mm
|
|Breech lock
|Cinematography
|
|-
|Arri LPL
|{{nts|44}} mm
|Arri LF
|{{nts|62}} mm
|
|Breech lock
|Cinematography
|
|-
|[[Arri Maxi PL]]
|{{nts|52}} mm
|{{ntsh|57.303}}[[70 mm film|70 mm]]
|{{nts|64}} mm
|
|
|Cinematography
|
|-
|[[T-mount|T]]
|{{nts|55}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|42}} mm
|0.75&nbsp;mm
|Screw
|Photography
|[[Tamron]]
|-
|YS Auto T-Thread
|{{nts|55}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|42}} mm
|0.75&nbsp;mm
|Screw
|Photography
|[[Sigma Corporation]]
|-
|T-thread
|{{nts|55}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|47}} mm
|0.75&nbsp;mm
|Screw
|Photography
|[[Tokina]]
|-
|H-Mount
|{{nts|55}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|47}} mm
|0.75&nbsp;mm
|Screw
|Photography
|Hanimex (rebranding of Tokina M47)
|-
|[[PV mount|Panavision PV]]
|{{nts|57.15}} mm
|{{ntsh|43.267}}[[35 mm movie film|35 mm]]
|{{nts|49.5}} mm
|
|Breech lock
|Cinematography
|
|-
|[[B3-mount]]
|{{nts|58}} mm
|[[2/3"]]
|
|
|Reverse bayonet
|Video
|Ikegami
|-
|[[BNCR mount|Mitchell BNCR]]
|{{nts|61.468}} mm
|{{ntsh|43.267}}[[35 mm movie film|35 mm]]
|{{nts|68}} mm
|
|Breech lock
|Cinematography
|
|-
|[[Zeiss Panflex 5522/23 for Contax rf|Zeiss Panflex 5522/23 for Contax RF]]
|{{nts|64.50}} mm 
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{ntsh|34}}
|
|Double bayonet
|Photography
|
|-
|[[Kowa Six/Super 66]]
|{{nts|79}} mm
|{{ntsh|79.196}}[[120 film|6×6]]
|
|
|Breech lock
|Photography
|
|-
|[[Hasselblad]]
|{{nts|74.9}} mm
|{{ntsh|79.196}}[[120 film|6×6]]
|{{nts|69}} mm
|
|Bayonet
|Photography
|
|-
|[[Hasselblad#XPan|Hasselblad Xpan]]
|{{nts|34.27}} mm
|{{ntsh|62.769}}[[135 film|35 mm panoramic]]
|{{nts|46}} mm
|
|Bayonet
|Photography
|
|-
|[[Bronica#ETR series|Bronica ETR]]
|{{nts|69}} mm
|{{ntsh|  }}[[120 film|6×4.5]]
|
|
|Bayonet
|Photography
|
|-
|[[Bronica#RF series|Bronica RF]]
|
|{{ntsh|  }}[[120 film|6×4.5]]
|
|
|Bayonet
|Photography
|
|-
|[[Bronica#SQ series|Bronica SQA]]
|{{nts|101.7}} mm
|{{ntsh|79.196}}[[120 film|6×6]]
|{{nts|57}} mm
|
|Bayonet
|Photography
|
|-
|[[Bronica#GS series|Bronica GS1]]
|{{nts|85}} mm
|{{ntsh|89.644}}[[120 film|6×7]]
|{{nts|80.5}} mm
|
|Bayonet
|Photography
|
|-
|[[Mamiya 645]]
|{{nts|63.3}} mm
|{{ntsh|70}}[[120 film|6×4.5]]
|{{nts|62}} mm
|
|Bayonet
|Photography
|
|-
|[[Mamiya 6]]
|{{nts|56.2}} mm (approx.)<ref>{{Cite web|url=https://www.kenrockwell.com/mamiya/6.htm|title=Mamiya 6|website=www.kenrockwell.com}}</ref>
|{{ntsh| }}[[120 film|6×6]]
|
|
|Bayonet
|Photography
|
|-
|[[Mamiya 7|Mamiya 7/7II]]
|{{nts|59}} mm (approx.)
|{{ntsh|89.644}}[[120 film|6×7]]
|{{nts|49}} mm<ref>{{Cite web|url=https://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html|title=Camera Mounts Sorted by Register|website=www.graphics.cornell.edu|access-date=2018-08-23}}</ref>
|
|Bayonet
|Photography
|
|-
|[[RZ67|Mamiya RZ67]]
|{{nts|105}} mm
|{{ntsh|89.644}}[[120 film|6×7]]
|{{nts|60}} mm
|
|Bayonet
|Photography
|
|-
|[[Mamiya RB67]]
|{{nts|112}} mm
|{{ntsh|89.644}}[[120 film|6×7]]
|{{nts|60}} mm
|
|Bayonet
|Photography
|
|-
|[[Mamiya ZE]]
|{{nts|45.5}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|
|
|Bayonet
|Photography
|
|-
|[[Mamiya/Sekor E]]
|{{nts|43.5}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|49}} mm
|
|Bayonet
|Photography
|
|-
|[[Pentax 645]]
|{{nts|70.87}} mm
|{{ntsh|70}}[[120 film|6×4.5]]
|{{nts|61.2}} mm
|
|Bayonet
|Photography
|
|-
|[[Pentax 6x7]]
|{{nts|84.95}} mm
|{{ntsh|89.644}}[[120 film|6×7]]
|{{nts|72}} mm
|
|Bayonet
|Photography
|
|-
|[[Pentacon Six mount|Pentacon Six]]
|{{nts|74.1}} mm
|{{ntsh|79.196}}[[120 film|6×6]]
|{{nts|60}} mm
|
|Breech lock
|Photography
|
|-
|[[Fujifilm G-mount|Fujifilm G]]
|{{nts|26.7}} mm
|{{ntsh|43.267}}43.8x32.9&nbsp;mm
|{{nts|65}} mm<ref>{{cite web
| title=FUJIFILM GFX 50S, Features
| publisher=[[Fujifilm]]
| url=http://www.fujifilm.com/products/digital_cameras/gfx/fujifilm_gfx_50s/features/
| access-date=2018-05-23
}}</ref>
|
|Bayonet
|Photography (Digital)
|[[Fujifilm GFX series]]
|-
|[[Rolleiflex SL66]]
|{{nts|102.8}} mm
|{{ntsh|79.196}}[[120 film|6×6]]
|
|
|Bayonet
|Photography
|
|-
|[[Rolleiflex SL35]]
|{{nts|44.46}} mm
|{{ntsh|43.267}}[[135 film|35 mm]]
|{{nts|46}} mm
|
|Bayonet
|Photography
|
|-
|[[Royal Microscopical Society|RMS]] thread, society thread
|{{nts|150}}/180&nbsp;mm
|
|0.8", Whitworth
|36&nbsp;tpi
|Screw
|Microscope
|older microscopes
|-
|[[Leica Microsystems|Leica]]<br>[[Nikon Instruments|Nikon Biological]]
|Unknown
|
|M25
|0.75&nbsp;mm
|Screw
|Microscope
|
|-
|BD Mount
|Unknown
|
|M26
|0.7&nbsp;mm
|Screw
|Microscope
|[[Mitutoyo]]<br>[[Olympus Corporation|Olympus]] BD<br>[[Nikon]] BD
|-
|[[Carl Zeiss AG|Zeiss]]
|Unknown
|
|M27
|0.75&nbsp;mm
|Screw
|Microscope
|
|-
|[[TFL-mount|TFL]]<ref name="Lens Mounts {{pipe}} Edmund Optics">{{cite web | url=https://www.edmundoptics.eu/knowledge-center/application-notes/imaging/lens-mounts/ | title=Lens Mounts|website=Edmund Optics }}</ref>
|{{nts|17.526}} mm
|28&nbsp;mm
|M35
|0.75&nbsp;mm
|Screw
|Machine Vision
|
|-
|[[TFL II]]<ref name="Lens Mounts {{pipe}} Edmund Optics"/>
|{{nts|17.526}} mm
|35&nbsp;mm
|M48
|0.75&nbsp;mm
|Screw
|Machine Vision
|
|-
|Pentax Auto 110
|27 mm<ref>{{Cite web |title=Pentax Auto 110 Lenses |url=https://pages.mtu.edu/~shene/FORUM/Taiwan-Forum/Lens-Talk/20-Pentax-110-Lens/Pentax-Auto-110.html |access-date=2024-11-26 |website=pages.mtu.edu}}</ref>
|{{ntsh|43.267}}[[110 film|110 Film]]
|20.6 mm<ref>{{Cite web |last=Bremdebrommer |date=16 December 2023 |title=Pentax auto 110 to Sony E / FE adapter |url=https://www.thingiverse.com/thing:6380505 |access-date=26 November 2024 |website=Thingiverse}}</ref>
|
|Bayonet
|Photography
|{{ntsh|43.267}}[[Pentax Auto 110|Auto 110]]
|} <!-- end of WikiTable -->

For small camera modules, used in e.g. [[Closed-circuit television|CCTV]] systems and [[machine vision]], a range of metric thread mounts exists. The smallest ones can be found also in e.g. cellphones and endoscopes. The most common by far is the M12x0.5, followed by M8x0.5 and M10x0.5.<ref>{{cite web|url=http://www.cctvopticallens.com/|archive-url=https://web.archive.org/web/20170930154648/http://www.cctvopticallens.com/|url-status=usurped|archive-date=September 30, 2017|title=cctvopticallens-m12 and cs mount lens provider|website=www.cctvopticallens.com|access-date=3 April 2018}}</ref>
* M4.2x0.2 (1/7" sensors)
* M4.6x0.25 (1/5", 2.4mm, 3.8mm sensors, industrial endoscopes)
* M5x0.35 (1/6", 1/5" sensors)
* M5.5x0.35 (1.7", 1/5.8", 1/5", 1/4" sensors)
* M6x0.35 (1/4", 5.2mm, 4.85mm sensors)
* M6.4x0.25 (1/3" sensors)
* M7x0.35 (1.8", 1.7", 1/6", 1/5", 1/4", 1/3.6", 1/3.2", 1/2.7", 4.85mm sensors)
* M8x0.35 (1/4", 1/3" sensors)
* M8x0.5 (1/5", 1/4", 1/3" sensors; sometimes occurs in diode laser modules)
* M9x0.5 (1/2.7", 1/3", 1/3.2" sensors; also commonly encountered in diode laser modules)
* M10x0.5 (1/4", 1/3" sensors)
* M12x0.5 (the S-mount, listed in the table)
* M22x0.5 (1/1.2" sensors)

==Focusing lens mount==

The axial adjustment range for focusing [[Ultra wide angle lens]]es and some [[Wide-angle lens]]es in [[View camera|large format cameras]] is usually very small.

So some manufacturers (e.g. [[Linhof]]) offered special focusing lens mounts, so-called [[wide-angle focusing accessory|wide-angle focusing accessories]] for their cameras.
With such a device, the lens could be focused precisely without moving the entire front standard.

==Secondary lens mount==
[[Image:Teleconverter with Camera and lens.swn.jpg|thumb|A teleconverter attached between a camera and its objective]]
[[Secondary lens]] refers to a multi-element lens mounted either in front of a camera's primary lens, or in between the camera body and the primary lens.

(D)SLR camera & interchangeable-lens manufacturers offer lens accessories like [[extension tube]]s and secondary lenses like [[teleconverter]]s, which mount in between the camera body and the primary lens, both using and providing a primary lens mount. Various lensmakers also offer optical accessories that mount in front of the lens; these may include [[wide-angle lens|wide-angle]], [[telephoto]], [[fisheye lens|fisheye]], and [[close-up]] or [[macro photography|macro]] adapters.

[[Canon PowerShot A]] and [[Canon PowerShot G]] cameras have a built-in or non-interchangeable primary (zoom) lens, and Canon has "conversion tube" accessories available for some [[Canon PowerShot]] camera models which provide either a 52mm or 58mm "accessory/filter" screw thread.  Canon's close-up, wide- (WC-DC), and tele-conversion (TC-DC) lenses have 2, 3, and 4-element lenses respectively, so they are multi-element lenses and not diopter "filters".

==Lens mount adapters==
[[File:Lens Adapter.jpg|thumb|This lens adapter is a passive adapter designed for mounting a Nikon F mount lens to a Micro Four Thirds camera.]]
{{main article|Lens adapter}}

Lens mount adapters are designed to attach a lens to a camera body with non-matching mounts. Generally, a lens can be easily adapted to a camera body with a smaller flange focal distance by simply adding space between the camera and the lens. When attempting to adapt a lens to a camera body with a larger flange focal distance, the adapter must include a secondary lens in order to compensate. This has the side effect of decreasing the amount of light that reaches the sensor, as well as adding a [[crop factor]] to the lens. Without the secondary lens, these adapters will function as an [[extension tube]] and will not be able to focus to infinity.<ref name="similaar">{{cite web|title=Lens mount compatibility chart|url=http://www.similaar.com/foto/lensmount/lensmount.html|access-date=2016-11-29}}</ref>

== See also ==
*[[ISO metric screw thread]]
*[[Lens board]]

== Notes ==
{{Cnote|A|The authoritative normative source for 4/3 standards information is Four-Thirds.Org and not 3rd-party reviews.}}

4/3's published facts:
*"Size of the 4/3-type Sensor:  The standard diagonal length of the sensor is {{Convert|21.63|mm|in}}.  It is half that of 35-mm film format ({{Convert|36|mm|in}} x {{Convert|24|mm|in}} = {{Convert|43.27|mm|in}})  The [[image circle]] of the interchangeable lens is specified based on this diagonal length. The focal length is about a half that of a 135 film camera lens assuming the same angle of view."<ref>{{cite web
| title=About Four Thirds, Standard, Whitepaper (Summary of Standard)
| publisher=[[Four Thirds System]]
| url=http://www.four-thirds.org/en/about/standard.html
| access-date=2008-08-11
| archive-url=https://web.archive.org/web/20090307060248/http://www.four-thirds.org/en/about/standard.html
| archive-date=2009-03-07
| url-status=dead
}}</ref>
*"The foundation for the high picture quality of the Four Thirds system is the lens mount, which is about twice the diameter of the image circle."<ref>{{cite web
| title=About Four Thirds, Standard, Benefits of Four Thirds
| publisher=[[Four Thirds System]]
| url=http://www.four-thirds.org/en/about/benefit.html
| access-date=2008-08-11
}}</ref>
*"Differences between Four Thirds System mount and Micro Four Thirds System mount:   Mount diameter reduction; As a result of research aimed at facilitating the design of compact, lightweight lenses while maintaining the current strength, the outer diameter of the lens mount has been reduced by approx. {{Convert|6|mm|in}}. ... the Micro Four Thirds System ... specifies the optimum flange back length required to reduce camera size and thickness, assuming the omission of the mirror box.  The flange back length has been reduced to about 1/2 that of the Four Thirds System."<ref>{{cite web
| title=Micro Four Thirds, Standard, Whitepaper (Summary of Standard)
| publisher=[[Four Thirds System]]
| url=http://www.four-thirds.org/en/microft/whitepaper.html
| access-date=2008-08-11
}}</ref>

So:
*21.63mm * 2 = {{Convert|43.26|mm|in}} or ~44mm
*43.26mm – 6mm = {{Convert|37.26|mm|in}} or ~38mm
*<math>\mathrm{(21.63\ mm)^2 = 17.3\ mm ^ 2 + 12.98\ mm ^ 2}</math>;  See: [[Pythagorean theorem]] (<math>5^2 = 4^2 + 3^2</math>)

NOTE:
Some published reviews of 4/3 instead cite the (female) "outside diameter" of the lens or mount as ~50mm (and micro-4/3 as ~44mm),<ref name=dpr>{{cite web
| title = Olympus and Panasonic announce Micro Four Thirds
| publisher = Digital Photography Review
| url = http://www.dpreview.com/news/0808/08080501microfourthirds.asp
}}</ref> and not the appropriate ''major'' diameter (D) ~44mm which is the camera body's female mount inside-diameter and the lens's male mount outside-diameter (micro-4/3 ~38mm).
<!-- end of Cnote A -->

== References ==
{{Reflist}}

=== Sources ===
{{Refbegin}}
*{{cite web |url=http://www.a1.nl/phomepag/markerink/mounts.htm |title=Camera mounts & registers |author=Markerink, Willem-Jan |access-date=2007-09-20 |archive-date=2007-11-24 |archive-url=https://web.archive.org/web/20071124034629/http://www.a1.nl/phomepag/markerink/mounts.htm |url-status=dead }}
{{Refend}}

==External links==
* [http://members.tripod.com/rick_oleson/index-99.html SLR Mount Identification Guide]
* [https://web.archive.org/web/20120402205115/http://www.kineoptics.com:80/camera.html List of Camera, Mount Type and Register for Mechanical & Optical Instruments]
* [https://web.archive.org/web/20081221083400/http://medfmt.8k.com/ https://web.archive.org/web/20081221083400/http://medfmt.8k.com/], Camera mounts & registers from Robert Monahan Medium Format Photography Megasite
* [http://www.markerink.org/WJM/HTML/mounts.htm http://www.markerink.org/WJM/HTML/mounts.htm], Camera mounts & registers from Willem-Jan Markerink
* [http://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html Camera Mounts Sorted by Register]
* [http://www.graphics.cornell.edu/~westin/misc/mounts-alphabetical.html Alphabetical List of Camera Mounts]
* [https://web.archive.org/web/20090703235032/http://www.nikonlinks.com/unklbil/nomenclature.htm Nikon Lens Nomenclature – a study in frustration]
* [http://www.adaptall-2.com/ Adaptall-2.com]
* [https://web.archive.org/web/20120112031010/http://www.dpreview.com/previews/fujifilmxpro1/ DPReview Hands-on preview of Fujifilm X-Pro1]
* [http://www.dpreview.com/previews/canon-eos-m/ DPreview Hands-on preview of Canon EOS M]
* [http://www.zenitcamera.com/qa/qa-gost10332-72.html Standard: GOST 10332-72 (in Russian) – M42×1/45.5, M39×1/28.8]
* [http://www.zenitcamera.com/qa/qa-gost10332-63.html Standard: GOST 10332-63 (in Russian) – M39×1/45.2 (aka «Z39»), M39×1/28.8, bayonet «C» (cameras: «Zenit-5», «Zenit-6», «Zenit-7»), bayonet «Zenit-7»] (in Russian)

{{DEFAULTSORT:Lens Mount}}
[[Category:Lens mounts| ]]