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<title>Lens mount</title>

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Lens mount

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A lens mount is an interface – mechanical and often also electrical – between a photographic <a href="Camera" title="Camera">camera</a> body and a lens. It is a feature of camera systems where the <a href="System_camera" title="System camera">body allows interchangeable lenses</a>, most usually the <a href="Rangefinder_camera" title="Rangefinder camera">rangefinder camera</a>, <a href="Single_lens_reflex" class="mw-redirect" title="Single lens reflex">single lens reflex</a> type, single lens mirrorless type or any <a href="Movie_camera" title="Movie camera">movie camera</a> of <a href="16_mm" class="mw-redirect" title="16 mm">16 mm</a> or higher <a href="Film_gauge" title="Film gauge">gauge</a>. 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 <a href="C_mount" title="C mount">C-mount</a> or <a href="T-mount" title="T-mount">T-mount</a> elements.

<div class="mw-heading mw-heading2"><h2 id="Mount_types">Mount types</h2></div>

A lens mount may be a screw-threaded type, a <a href="Bayonet#Linguistic_impact" title="Bayonet">bayonet</a>-type, or a <a href="Breech-lock" title="Breech-lock">breech-lock</a> (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.

<a href="Bayonet_mount" title="Bayonet mount">Bayonet mounts</a> 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 <a href="Flange_focal_distance" title="Flange focal distance">flange focal distance</a> from the lens mount to the film or sensor can also be different. Many allege that these incompatibilities are due to the desire of manufacturers to "<a href="Vendor_lock-in" title="Vendor lock-in">lock in</a>" consumers to their brand.

In movie cameras, the two most popular mounts in current usage on professional <a href="Digital_cinematography" title="Digital cinematography">digital cinematography</a> cameras are <a href="Arri" title="Arri">Arri</a>'s <a href="Arri_PL" class="mw-redirect" title="Arri PL">PL-mount</a> and <a href="Panavision" title="Panavision">Panavision</a>'s <a href="PV_mount" title="PV mount">PV-mount</a>. The PL-Mount is used both on Arri and <a href="Red_Digital_Cinema_Camera_Company" class="mw-redirect" title="Red Digital Cinema Camera Company">RED</a> digital cinematography cameras, which as of 2012 are the most used cameras for <a href="List_of_films_shot_in_digital" class="mw-redirect" title="List of films shot in digital">films shot in digital</a>. 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 <a href="Cine_lens" title="Cine lens">cine lens</a> 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.

<div class="mw-heading mw-heading2"><h2 id="List_of_lens_mounts">List of lens mounts</h2></div>

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</caption>

<th>Mount name

</th>

<th><a href="Flange_focal_distance" title="Flange focal distance">Flange focal distance</a>

</th>

<th><a href="Image_sensor_format" title="Image sensor format">Frame size</a>

</th>

<th data-sort-type="text">Throat or thread diameter

</th>

<th data-sort-type="text">Mount thread pitch

</th>

<th>Mount type

</th>

<th>Primary use

</th>

<th>Camera lines

</th></tr>

<tr>

<td>Kinor 16SP

</td>

</td>

</td>

<td>43 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Cinematography

</td>

<td><a href="Kinor" title="Kinor">Kinor 16SP</a>, <a href="Krasnogorsk_(camera)" title="Krasnogorsk (camera)">Krasnogorsk</a>-1, -2, -3<a href="#cite_note-2">[2]</a><a href="#cite_note-3">[3]</a> 16mm movie cameras

</td></tr>

<tr>

<td>Kinor 16SX

</td>

</td>

</td>

<td>43 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Cinematography

</td>

<td>Kinor 16SX-1M,-2M 16mm movie camera

</td></tr>

<tr>

<td>OST/OCT-19

</td>

</td>

</td>

<td>61 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Cinematography

</td>

<td><a href="Konvas" title="Konvas">Konvas-2M</a>, Kinor-35H 35mm movie cameras

</td></tr>

<tr>

<td>Kiev-16U

</td>

</td>

</td>

<td>32 mm

</td>

<td>0.5 mm

</td>

<td>Screw

</td>

<td>Cinematography

</td>

<td><a href="Kiev_16U_16mm_cine_camera" title="Kiev 16U 16mm cine camera">Kiev-16U/UE</a> 16mm movie cameras

</td></tr>

<tr>

<td>Kiev-16C

</td>

</td>

</td>

<td>27 mm

</td>

<td>0.75mm

</td>

<td>Screw

</td>

<td>

</td>

<td>Kiev-1C 16mm movie camera

</td></tr>

<tr>

<td>Canon SV

</td>

<td>32.00 mm

</td>

<td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td><a href="Canon_(company)" class="mw-redirect" title="Canon (company)">Canon</a> RC-701 & 760

</td></tr>

<tr>

<td><a href="Argus_C3" title="Argus C3">Argus C3</a>

</td>

<td>40.3 mm

</td>

</td>

<td>34 mm

</td>

<td>20 TPI

</td>

<td>Screw

</td>

<td>Photography

</td>

<td><a href="Argus_C3" title="Argus C3">Argus C3</a>

</td></tr>

<tr>

<td>Canon EX

</td>

<td>20 mm

</td>

<td>1/2"

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Canon_FL" class="mw-redirect" title="Canon FL">Canon FL</a>

</td>

<td>42 mm

</td>

</td>

<td>48 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Canon_FD_lens_mount" title="Canon FD lens mount">Canon FD</a>

</td>

<td>42 mm

</td>

</td>

<td>48 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Photography

</td>

<td>Canon <a href="Canon_F_series" title="Canon F series">F series</a>, <a href="Canon_A_series" title="Canon A series">A series</a>, and <a href="Canon_T_series" title="Canon T series">T series</a> SLRs

</td></tr>

<tr>

<td><a href="Canon_FD_lens_mount" title="Canon FD lens mount">Canon FDn</a> (a.k.a. "New FD")

</td>

<td>42 mm

</td>

</td>

<td>48 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>completely interchangeable with earlier FD lenses

</td></tr>

<tr>

<td><a href="Canon_EF_lens_mount" title="Canon EF lens mount">Canon EF</a>

</td>

<td>44.00 mm

</td>

</td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Canon_EOS" title="Canon EOS">Canon EOS</a> <a href="135_film" title="135 film">35mm film</a> SLR, Full Frame & APS-H DSLR

</td></tr>

<tr>

<td><a href="Canon_EF-S_lens_mount" title="Canon EF-S lens mount">Canon EF-S</a>

</td>

<td>44.00 mm

</td>

</td>

<td>54 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td><a href="Canon_EOS" title="Canon EOS">Canon EOS</a> <a href="APS-C" title="APS-C">APS-C</a> DSLR

</td></tr>

<tr>

<td><a href="Canon_EF-M_lens_mount" title="Canon EF-M lens mount">Canon EF-M</a>

</td>

<td>18 mm

</td>

</td>

<td>47 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td><a href="Canon_EOS" title="Canon EOS">Canon EOS</a> M series Mirrorless <a href="APS-C" title="APS-C">APS-C</a> Cameras

</td></tr>

<tr>

<td><a href="Canon_RF_mount" class="mw-redirect" title="Canon RF mount">Canon RF</a>

</td>

<td>20 mm

</td>

</td>

<td>54 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td><a href="Canon_EOS" title="Canon EOS">Canon EOS</a> 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

</td></tr>

<tr>

<td><a href="Nikon_S-mount" title="Nikon S-mount">Nikon S</a>

</td>

<td>34.85 mm

</td>

</td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Nikon_S-mount" title="Nikon S-mount">Nikon Rangefinder</a>

</td></tr>

<tr>

<td><a href="Nikon_F-mount" title="Nikon F-mount">Nikon F</a>

</td>

<td>46.5 mm

</td>

</td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Nikon_F-mount" title="Nikon F-mount">Nikon F</a> <a href="135_film" title="135 film">35mm film</a> SLR, Full Frame & <a href="APS-C" title="APS-C">APS-C</a> DSLR

</td></tr>

<tr>

<td><a href="Nikon_1_mount" class="mw-redirect" title="Nikon 1 mount">Nikon 1</a>

</td>

<td>17 mm

</td>

<td>13.2 x 8.8mm

</td>

<td>40 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td><a href="Nikon_1_series" title="Nikon 1 series">Nikon 1 series</a>

</td></tr>

<tr>

<td><a href="Nikon_Z-mount" title="Nikon Z-mount">Nikon Z</a>

</td>

<td>16 mm

</td>

</td>

<td>55 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td>Nikon Z - Mirrorless Full Frame & <a href="APS-C" title="APS-C">APS-C</a>

</td></tr>

<tr>

<td><a href="Sony_Mavica" title="Sony Mavica">Sony Mavica</a>

</td>

<td>57 mm

</td>

<td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td>

</td></tr>

<tr>

</td>

<td>18 mm

</td>

</td>

<td>46.1 mm (1.815 inch)

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td><a href="Sony_NEX" class="mw-redirect" title="Sony NEX">Sony E/FE Mount Alpha Mirrorless Full Frame / APS-C| Sony NEX Mirrorless APS-C</a>

</td></tr>

<tr>

<td><a href="Minolta_SR-mount" title="Minolta SR-mount">Minolta SR</a>

</td>

<td>43.50 mm

</td>

</td>

<td>44.97 mm

</td>

<td>

</td>

<td>Bayonet (54°)

</td>

<td>Photography

</td>

<td><a href="Minolta_SR_mount" class="mw-redirect" title="Minolta SR mount">Minolta SR/MC/MD</a>

</td></tr>

<tr>

<td><a href="Minolta_Vectis_S_series" title="Minolta Vectis S series">Minolta V</a>

</td>

<td>38.00 mm

</td>

</td>

<td>39.7 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Minolta_Vectis" class="mw-redirect" title="Minolta Vectis">Minolta Vectis</a>

</td></tr>

<tr>

<td><a href="Minolta_A-mount" class="mw-redirect" title="Minolta A-mount">Minolta A</a>

</td>

<td>44.50 mm

</td>

</td>

<td>49.7 mm (1.939 inch)

</td>

<td>

</td>

<td>Bayonet (54°)

</td>

<td>Photography

</td>

<td>Minolta DSLR AF/Alpha/Dynax/Maxxum Sony DSLR Alpha (α) A Mount

</td></tr>

<tr>

<td><a href="Pentax_Auto_110" title="Pentax Auto 110">Pentax Auto 110</a>

</td>

<td>27 mm

</td>

</td>

<td>19.5 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>Pentax Auto 110 and Auto 110 Super

</td></tr>

<tr>

<td><a href="Pentax_Q" title="Pentax Q">Pentax Q</a>

</td>

<td>9.2 mm

</td>

<td>1/2.3", 1/1.7"

</td>

<td>31 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td>

</td></tr>

<tr>

<td><a href="Pentax_K_mount" class="mw-redirect" title="Pentax K mount">Pentax K</a>

</td>

<td>45.46 mm

</td>

</td>

<td>44 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>Used also by Ricoh, Chinon, Agfa, Vivitar and KMZ Zenit cameras

</td></tr>

<tr>

<td>Leitz Visoflex I

</td>

<td>91.3 mm

</td>

</td>

</td>

</td>

<td>Screw

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>Leitz Visoflex II/III

</td>

<td>67.8 mm

</td>

</td>

<td>44 mm

</td>

<td>

</td>

<td>Bayonet (Leica M)

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Leica_M_mount" title="Leica M mount">Leica M</a>

</td>

<td>27.80 mm

</td>

</td>

<td>44 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Leica_M_series" class="mw-redirect" title="Leica M series">Leica M series</a> <a href="Leica_CL" title="Leica CL">Leica CL</a> <a href="Minolta_CLE" title="Minolta CLE">Minolta CLE</a>

</td></tr>

<tr>

<td><a href="Leica_R_bayonet" title="Leica R bayonet">Leica R</a>

</td>

<td>47.00 mm

</td>

</td>

<td>49 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Leica_L-Mount" title="Leica L-Mount">Leica L</a>

</td>

<td>20 mm

</td>

</td>

<td>51.6 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td>L-Mount Alliance (Leica, Panasonic, Sigma, DJI and Blackmagic Design cameras)

</td></tr>

<tr>

<td><a href="Contax" title="Contax">Contax</a> RF

</td>

<td>34.85 mm

</td>

</td>

<td>44 mm

</td>

<td>

</td>

<td>Double bayonet

</td>

<td>Photography

</td>

<td><a href="Contax_I" title="Contax I">Contax I</a>, II, III, IIa, IIIa <a href="Kiev_(brand)#Kiev_35mm_rangefinders" title="Kiev (brand)">Kiev rangefinders</a>

</td></tr>

<tr>

<td><a href="Contax_G" title="Contax G">Contax G</a>

</td>

<td>29.00 mm

</td>

</td>

<td>44 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>Contax N

</td>

<td>48 mm

</td>

</td>

<td>55 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>Contax/Yashica

</td>

<td>45.5 mm

</td>

</td>

<td>48 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Yashica" title="Yashica">Yashica</a>/<a href="Contax" title="Contax">Contax</a>

</td></tr>

<tr>

<td>Yashica MA

</td>

<td>~45.8 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>Kyocera Yashica 230 AF etc.

</td></tr>

<tr>

<td><a href="Fujica_X-mount" title="Fujica X-mount">Fujica X</a>

</td>

<td>43.5 mm

</td>

</td>

<td>49 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>Fujica-X

</td></tr>

<tr>

<td><a href="Fujifilm_X-mount" title="Fujifilm X-mount">Fujifilm X</a>

</td>

<td>17.7 mm

</td>

</td>

<td>44 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td><a href="Fujifilm_X_series" title="Fujifilm X series">Fujifilm X series</a> mirrorless

</td></tr>

<tr>

<td><a href="Olympus_Pen_F" title="Olympus Pen F">Olympus Pen F</a>

</td>

<td>28.95 mm

</td>

<td><a href="135_film" title="135 film">35 mm</a> half-frame

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Olympus_OM" class="mw-redirect" title="Olympus OM">Olympus OM</a>

</td>

<td>46 mm

</td>

</td>

<td>46 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Four_Thirds_System" class="mw-redirect" title="Four Thirds System">Four Thirds</a>

</td>

<td>38.67 mm

</td>

<td>17.3 mm × 12.98 mm

</td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td>Olympus E Panasonic Lumix DMC-L Leica Digilux

</td></tr>

<tr>

<td><a href="Micro_Four_Thirds_System" class="mw-redirect" title="Micro Four Thirds System">Micro Four Thirds</a>

</td>

<td>19.25 mm

</td>

<td>17.3 mm × 12.98 mm

</td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td>Olympus Pen & OM-D series Panasonic G, GF, GX & GH Series Blackmagic Design Cinema Camera

</td></tr>

<tr>

</td>

<td>28 mm (27.80 mm?)

</td>

</td>

<td>44 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Konica_Hexar_RF" title="Konica Hexar RF">Konica Hexar RF</a>

</td></tr>

<tr>

<td><a href="Konica_F-mount" class="mw-redirect" title="Konica F-mount">Konica F</a>

</td>

<td>40.50 mm

</td>

</td>

<td>40 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Konica_F" title="Konica F">Konica F</a>

</td></tr>

<tr>

<td><a href="Konica_AR-mount" class="mw-redirect" title="Konica AR-mount">Konica AR</a>

</td>

<td>40.50 mm

</td>

</td>

<td>47 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Konica_Autoreflex" title="Konica Autoreflex">Konica Autoreflex</a>

</td></tr>

<tr>

<td><a href="Samsung_NX_mini" title="Samsung NX mini">Samsung NX mini</a>

</td>

<td>6.95 mm

</td>

<td>1"

</td>

<td>38 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>photography (Digital)

</td>

<td>

</td></tr>

<tr>

<td><a href="Samsung_NX-mount" title="Samsung NX-mount">Samsung NX</a>

</td>

<td>25.5 mm

</td>

</td>

<td>42 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td>

</td></tr>

<tr>

<td>Samsung Kenox

</td>

<td>44.5 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>Manual focus only; there is only one compatible camera - Samsung Kenox GX-1/Samsung SR4000.

</td></tr>

<tr>

<td>DJI DL

</td>

</td>

</td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital), Cinematography

</td>

<td>For aerial drone and gimbal use; DJI Zenmuse X7, X9 and DJI Ronin 4D X9 cameras.

</td></tr>

<tr>

<td><a href="Icarex_BM" class="mw-redirect" title="Icarex BM">Icarex BM</a>

</td>

<td>48.00 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Photography

</td>

<td>Icarex 35S

</td></tr>

<tr>

</td>

<td>12.29 mm

</td>

</td>

<td>15.88 mm (0.625 inch)

</td>

</td>

<td>Screw

</td>

<td>Cinematography

</td>

<td>

</td></tr>

<tr>

</td>

</td>

<td>1/3", 1/2"

</td>

<td>25.40 mm (1 inch)

</td>

</td>

<td>Screw

</td>

<td>Cinematography / Industrial

</td>

<td>

</td></tr>

<tr>

</td>

<td>17.526 mm (0.69 inches)

</td>

<td>1/2", <a href="16_mm_film" title="16 mm film">16 mm</a>, 2/3", 1"

</td>

<td>25.40 mm (1 inch)

</td>

</td>

<td>Screw

</td>

<td>Cinematography / Industrial / Machine Vision

</td>

<td>

</td></tr>

<tr>

<td><a href="S-mount_(CCTV_lens)" title="S-mount (CCTV lens)">S</a> (a.k.a. M12)

</td>

<td>N/A. Screw mount must be adjusted manually for back focus. Back focal distance from <1mm to 12mm.

</td>

<td>1/6" to 1"

</td>

<td>12 mm

</td>

<td>0.5 mm pitch

</td>

<td>Screw

</td>

</td>

<td>Edmund Optics μ-Video

</td></tr>

<tr>

<td><a href="Bolex" title="Bolex">Bolex</a> Bajonet

</td>

<td>23.22 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Cinematography

</td>

<td>effective focal distance 17.526 mm (0.69 inches) due to beam splitter behind mount flange (accepts C-mount lenses with adapter)

</td></tr>

<tr>

<td>1/3" bayonet mount

</td>

<td>25 mm

</td>

<td>1/3" (5.24x2.94)

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Video

</td>

<td>JVC professional video cameras

</td></tr>

<tr>

<td><a href="M39_lens_mount" title="M39 lens mount">M39 (a.k.a. L-Mount, LTM)</a>

</td>

<td>28.80 mm

</td>

</td>

</td>

</td>

<td>Screw

</td>

<td>Photography

</td>

<td><a href="M39_lens_mount" title="M39 lens mount">Leica M39 screw mount</a>

</td></tr>

<tr>

<td><a href="Narciss" title="Narciss">Narciss</a>

</td>

<td>28.8 mm

</td>

</td>

<td>M24

</td>

<td>1 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>1/2" bayonet mount

</td>

<td>37.80 mm

</td>

<td>1/2" (6.97x3.92)

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Video

</td>

<td>Non-Sony professional video cameras

</td></tr>

<tr>

</td>

<td>37.80 mm

</td>

</td>

<td>42 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>Sony 1/2" Video

</td>

<td>38 mm

</td>

<td>1/2" (6.97x3.92)

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Video

</td>

<td>Sony professional video cameras

</td></tr>

<tr>

<td>Aaton universal

</td>

<td>40 mm

</td>

</td>

<td>50 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Cinematography

</td>

<td>

</td></tr>

<tr>

<td>Miranda bayonet/M44

</td>

<td>41.5 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Miranda_Camera_Company" title="Miranda Camera Company">Miranda Camera Company</a>

</td></tr>

<tr>

<td>Petriflex

</td>

<td>43.5 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Sigma_SA_mount" class="mw-redirect" title="Sigma SA mount">Sigma SA</a>

</td>

<td>44.00 mm

</td>

</td>

<td>44 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Sigma_SA_mount" class="mw-redirect" title="Sigma SA mount">Sigma SA</a>

</td></tr>

<tr>

<td><a href="Paxette" class="mw-redirect" title="Paxette">Paxette</a>

</td>

<td>44 mm

</td>

</td>

</td>

<td>1 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Praktiflex" title="Praktiflex">Praktiflex</a>

</td>

<td>44 mm

</td>

</td>

<td>M40

</td>

<td>1 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Praktica" title="Praktica">Praktica</a>

</td>

<td>44.40 mm

</td>

</td>

<td>42 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Exakta" title="Exakta">Exakta</a>

</td>

<td>44.7 mm

</td>

</td>

<td>46 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td><a href="Exakta" title="Exakta">Exakta</a>, <a href="Topcon_RE_Super" title="Topcon RE Super">Topcon Super</a>

</td></tr>

<tr>

<td>Zenit M39

</td>

<td>45.2 mm

</td>

</td>

</td>

<td>1 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>M37

</td>

<td>45.46 mm

</td>

</td>

<td>37 mm

</td>

<td>1 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td><a href="Asahiflex" title="Asahiflex">Asahiflex</a>

</td></tr>

<tr>

</td>

<td>45.46 mm

</td>

</td>

<td>42 mm

</td>

<td>1 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td>Praktica,<a href="#cite_note-11">[11]</a> Pentax, Zenit

</td></tr>

<tr>

<td><a href="B4-mount" title="B4-mount">B4-mount</a>

</td>

<td>48 mm

</td>

<td>2/3" (9.6x5.4)

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Video

</td>

<td>Professional and broadcast video cameras

</td></tr>

<tr>

<td>Praktina

</td>

<td>50 mm

</td>

</td>

<td>46 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>T-Thread (Very earliest type)

</td>

<td>50.7 mm

</td>

</td>

<td>M37

</td>

<td>0.75mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td>Tamron

</td></tr>

<tr>

<td>Adapt-A-Matic

</td>

<td>50.7 mm

</td>

</td>

<td>54 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>Tamron

</td></tr>

<tr>

<td>Adaptall & Adaptall-2

</td>

<td>50.7 mm

</td>

</td>

<td>54 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>Tamron

</td></tr>

<tr>

<td><a href="Arri_standard" class="mw-redirect" title="Arri standard">Arri standard</a>

</td>

<td>52 mm

</td>

</td>

<td>64 mm

</td>

<td>

</td>

<td>Tab lock

</td>

<td>Cinematography

</td>

<td>

</td></tr>

<tr>

<td><a href="Arri_bayonet" class="mw-redirect" title="Arri bayonet">Arri bayonet</a>

</td>

<td>52 mm

</td>

</td>

<td>64 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Cinematography

</td>

<td>

</td></tr>

<tr>

</td>

<td>52 mm

</td>

</td>

<td>54 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Cinematography

</td>

<td>

</td></tr>

<tr>

<td>Arri LPL

</td>

<td>44 mm

</td>

<td>Arri LF

</td>

<td>62 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Cinematography

</td>

<td>

</td></tr>

<tr>

<td>Arri Maxi PL

</td>

<td>52 mm

</td>

</td>

<td>64 mm

</td>

<td>

</td>

<td>

</td>

<td>Cinematography

</td>

<td>

</td></tr>

<tr>

</td>

<td>55 mm

</td>

</td>

<td>42 mm

</td>

<td>0.75 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td><a href="Tamron" title="Tamron">Tamron</a>

</td></tr>

<tr>

<td>YS Auto T-Thread

</td>

<td>55 mm

</td>

</td>

<td>42 mm

</td>

<td>0.75 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td><a href="Sigma_Corporation" title="Sigma Corporation">Sigma Corporation</a>

</td></tr>

<tr>

<td>T-thread

</td>

<td>55 mm

</td>

</td>

<td>47 mm

</td>

<td>0.75 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td><a href="Tokina" title="Tokina">Tokina</a>

</td></tr>

<tr>

<td>H-Mount

</td>

<td>55 mm

</td>

</td>

<td>47 mm

</td>

<td>0.75 mm

</td>

<td>Screw

</td>

<td>Photography

</td>

<td>Hanimex (rebranding of Tokina M47)

</td></tr>

<tr>

<td><a href="PV_mount" title="PV mount">Panavision PV</a>

</td>

<td>57.15 mm

</td>

</td>

<td>49.5 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Cinematography

</td>

<td>

</td></tr>

<tr>

<td>B3-mount

</td>

<td>58 mm

</td>

<td>2/3"

</td>

<td>

</td>

<td>

</td>

<td>Reverse bayonet

</td>

<td>Video

</td>

<td>Ikegami

</td></tr>

<tr>

<td><a href="BNCR_mount" title="BNCR mount">Mitchell BNCR</a>

</td>

<td>61.468 mm

</td>

</td>

<td>68 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Cinematography

</td>

<td>

</td></tr>

<tr>

<td>Zeiss Panflex 5522/23 for Contax RF

</td>

<td>64.50 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Double bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>Kowa Six/Super 66

</td>

<td>79 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Hasselblad" title="Hasselblad">Hasselblad</a>

</td>

<td>74.9 mm

</td>

</td>

<td>69 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Hasselblad#XPan" title="Hasselblad">Hasselblad Xpan</a>

</td>

<td>34.27 mm

</td>

<td><a href="135_film" title="135 film">35 mm panoramic</a>

</td>

<td>46 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Bronica#ETR_series" title="Bronica">Bronica ETR</a>

</td>

<td>69 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Bronica#RF_series" title="Bronica">Bronica RF</a>

</td>

<td>

</td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Bronica#SQ_series" title="Bronica">Bronica SQA</a>

</td>

<td>101.7 mm

</td>

</td>

<td>57 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Bronica#GS_series" title="Bronica">Bronica GS1</a>

</td>

<td>85 mm

</td>

</td>

<td>80.5 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Mamiya_645" title="Mamiya 645">Mamiya 645</a>

</td>

<td>63.3 mm

</td>

</td>

<td>62 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Mamiya_6" title="Mamiya 6">Mamiya 6</a>

</td>

<td>56.2 mm (approx.)<a href="#cite_note-12">[12]</a>

</td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Mamiya_7" title="Mamiya 7">Mamiya 7/7II</a>

</td>

<td>59 mm (approx.)

</td>

</td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="RZ67" class="mw-redirect" title="RZ67">Mamiya RZ67</a>

</td>

<td>105 mm

</td>

</td>

<td>60 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Mamiya_RB67" title="Mamiya RB67">Mamiya RB67</a>

</td>

<td>112 mm

</td>

</td>

<td>60 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>Mamiya ZE

</td>

<td>45.5 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td>Mamiya/Sekor E

</td>

<td>43.5 mm

</td>

</td>

<td>49 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Pentax_645" title="Pentax 645">Pentax 645</a>

</td>

<td>70.87 mm

</td>

</td>

<td>61.2 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Pentax_6x7" class="mw-redirect" title="Pentax 6x7">Pentax 6x7</a>

</td>

<td>84.95 mm

</td>

</td>

<td>72 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Pentacon_Six_mount" title="Pentacon Six mount">Pentacon Six</a>

</td>

<td>74.1 mm

</td>

</td>

<td>60 mm

</td>

<td>

</td>

<td>Breech lock

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Fujifilm_G-mount" title="Fujifilm G-mount">Fujifilm G</a>

</td>

<td>26.7 mm

</td>

<td>43.8x32.9 mm

</td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography (Digital)

</td>

<td><a href="Fujifilm_GFX_series" title="Fujifilm GFX series">Fujifilm GFX series</a>

</td></tr>

<tr>

<td><a href="Rolleiflex_SL66" title="Rolleiflex SL66">Rolleiflex SL66</a>

</td>

<td>102.8 mm

</td>

</td>

<td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Rolleiflex_SL35" title="Rolleiflex SL35">Rolleiflex SL35</a>

</td>

<td>44.46 mm

</td>

</td>

<td>46 mm

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

<td>

</td></tr>

<tr>

<td><a href="Royal_Microscopical_Society" title="Royal Microscopical Society">RMS</a> thread, society thread

</td>

<td>150/180 mm

</td>

<td>

</td>

<td>0.8", Whitworth

</td>

<td>36 tpi

</td>

<td>Screw

</td>

<td>Microscope

</td>

<td>older microscopes

</td></tr>

<tr>

<td><a href="Leica_Microsystems" title="Leica Microsystems">Leica</a> <a href="Nikon_Instruments" title="Nikon Instruments">Nikon Biological</a>

</td>

<td>Unknown

</td>

<td>

</td>

<td>M25

</td>

<td>0.75 mm

</td>

<td>Screw

</td>

<td>Microscope

</td>

<td>

</td></tr>

<tr>

<td>BD Mount

</td>

<td>Unknown

</td>

<td>

</td>

<td>M26

</td>

<td>0.7 mm

</td>

<td>Screw

</td>

<td>Microscope

</td>

<td><a href="Mitutoyo" title="Mitutoyo">Mitutoyo</a> <a href="Olympus_Corporation" title="Olympus Corporation">Olympus</a> BD <a href="Nikon" title="Nikon">Nikon</a> BD

</td></tr>

<tr>

<td><a href="Carl_Zeiss_AG" class="mw-redirect" title="Carl Zeiss AG">Zeiss</a>

</td>

<td>Unknown

</td>

<td>

</td>

<td>M27

</td>

<td>0.75 mm

</td>

<td>Screw

</td>

<td>Microscope

</td>

<td>

</td></tr>

<tr>

</td>

<td>17.526 mm

</td>

<td>28 mm

</td>

<td>M35

</td>

<td>0.75 mm

</td>

<td>Screw

</td>

<td>Machine Vision

</td>

<td>

</td></tr>

<tr>

</td>

<td>17.526 mm

</td>

<td>35 mm

</td>

<td>M48

</td>

<td>0.75 mm

</td>

<td>Screw

</td>

<td>Machine Vision

</td>

<td>

</td></tr>

<tr>

<td>Pentax Auto 110

</td>

</td>

</td>

</td>

<td>

</td>

<td>Bayonet

</td>

<td>Photography

</td>

</td></tr></tbody></table>

For small camera modules, used in e.g. <a href="Closed-circuit_television" title="Closed-circuit television">CCTV</a> systems and <a href="Machine_vision" title="Machine vision">machine vision</a>, 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.<a href="#cite_note-18">[18]</a>

<ul><li>M4.2x0.2 (1/7" sensors)</li>

<li>M4.6x0.25 (1/5", 2.4mm, 3.8mm sensors, industrial endoscopes)</li>

<li>M5x0.35 (1/6", 1/5" sensors)</li>

<li>M5.5x0.35 (1.7", 1/5.8", 1/5", 1/4" sensors)</li>

<li>M6x0.35 (1/4", 5.2mm, 4.85mm sensors)</li>

<li>M6.4x0.25 (1/3" sensors)</li>

<li>M7x0.35 (1.8", 1.7", 1/6", 1/5", 1/4", 1/3.6", 1/3.2", 1/2.7", 4.85mm sensors)</li>

<li>M8x0.35 (1/4", 1/3" sensors)</li>

<li>M8x0.5 (1/5", 1/4", 1/3" sensors; sometimes occurs in diode laser modules)</li>

<li>M9x0.5 (1/2.7", 1/3", 1/3.2" sensors; also commonly encountered in diode laser modules)</li>

<li>M10x0.5 (1/4", 1/3" sensors)</li>

<li>M12x0.5 (the S-mount, listed in the table)</li>

<li>M22x0.5 (1/1.2" sensors)</li></ul>

<div class="mw-heading mw-heading2"><h2 id="Focusing_lens_mount">Focusing lens mount</h2></div>

The axial adjustment range for focusing <a href="Ultra_wide_angle_lens" title="Ultra wide angle lens">Ultra wide angle lenses</a> and some <a href="Wide-angle_lens" title="Wide-angle lens">Wide-angle lenses</a> in <a href="View_camera" title="View camera">large format cameras</a> is usually very small.

So some manufacturers (e.g. <a href="Linhof" title="Linhof">Linhof</a>) offered special focusing lens mounts, so-called wide-angle focusing accessories for their cameras.

With such a device, the lens could be focused precisely without moving the entire front standard.

<div class="mw-heading mw-heading2"><h2 id="Secondary_lens_mount">Secondary lens mount</h2></div>

<a href="Secondary_lens" title="Secondary lens">Secondary lens</a> 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 <a href="Extension_tube" title="Extension tube">extension tubes</a> and secondary lenses like <a href="Teleconverter" title="Teleconverter">teleconverters</a>, 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 <a href="Wide-angle_lens" title="Wide-angle lens">wide-angle</a>, <a href="Telephoto" class="mw-redirect" title="Telephoto">telephoto</a>, <a href="Fisheye_lens" title="Fisheye lens">fisheye</a>, and <a href="Close-up" title="Close-up">close-up</a> or <a href="Macro_photography" title="Macro photography">macro</a> adapters.

<a href="Canon_PowerShot_A" title="Canon PowerShot A">Canon PowerShot A</a> and <a href="Canon_PowerShot_G" title="Canon PowerShot G">Canon PowerShot G</a> cameras have a built-in or non-interchangeable primary (zoom) lens, and Canon has "conversion tube" accessories available for some <a href="Canon_PowerShot" title="Canon PowerShot">Canon PowerShot</a> 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".

<div class="mw-heading mw-heading2"><h2 id="Lens_mount_adapters">Lens mount adapters</h2></div>

/* start https://en.wikipedia.org/ */

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</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="Lens_adapter" title="Lens adapter">Lens adapter</a></div>

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 <a href="Crop_factor" title="Crop factor">crop factor</a> to the lens. Without the secondary lens, these adapters will function as an <a href="Extension_tube" title="Extension tube">extension tube</a> and will not be able to focus to infinity.<a href="#cite_note-similaar-19">[19]</a>

<ul><li><a href="ISO_metric_screw_thread" title="ISO metric screw thread">ISO metric screw thread</a></li>

<li><a href="Lens_board" title="Lens board">Lens board</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2></div>

<a href="#ref_A">^</a> A: The authoritative normative source for 4/3 standards information is Four-Thirds.Org and not 3rd-party reviews.

4/3's published facts:

<ul><li>"Size of the 4/3-type Sensor: The standard diagonal length of the sensor is 21.63 millimetres (0.852 in). It is half that of 35-mm film format (36 millimetres (1.4 in) x 24 millimetres (0.94 in) = 43.27 millimetres (1.704 in)) The <a href="Image_circle" title="Image circle">image circle</a> 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."<a href="#cite_note-20">[20]</a></li>

<li>"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."<a href="#cite_note-21">[21]</a></li>

<li>"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. 6 millimetres (0.24 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."<a href="#cite_note-22">[22]</a></li></ul>

So:

<ul><li>21.63mm * 2 = 43.26 millimetres (1.703 in) or ~44mm</li>

<li>43.26mm – 6mm = 37.26 millimetres (1.467 in) or ~38mm</li>

<msup>

</mrow>

</msup>

<msup>

</mrow>

</msup>

<msup>

</mrow>

</msup>

</mrow>

</mstyle>

</mrow>

<annotation encoding="application/x-tex">{\displaystyle \mathrm {(21.63\ mm)^{2}=17.3\ mm^{2}+12.98\ mm^{2}} }</annotation>

</semantics>

</math><img src="./991aee5505ef3cdaeeee30fee0be820325ad183e.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:38.996ex; height:3.176ex;" alt="{\displaystyle \mathrm {(21.63\ mm)^{2}=17.3\ mm^{2}+12.98\ mm^{2}} }" loading="lazy">; See: <a href="Pythagorean_theorem" title="Pythagorean theorem">Pythagorean theorem</a> (<math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 5^{2}=4^{2}+3^{2}}">

<msup>

</mrow>

</msup>

<msup>

</mrow>

</msup>

<msup>

</mrow>

</msup>

</mstyle>

</mrow>

<annotation encoding="application/x-tex">{\displaystyle 5^{2}=4^{2}+3^{2}}</annotation>

</semantics>

</math><img src="./4865aa7681997afea7d962c57efb8f39b04f7182.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.505ex; width:12.589ex; height:2.843ex;" alt="{\displaystyle 5^{2}=4^{2}+3^{2}}" loading="lazy">)</li></ul>

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),<a href="#cite_note-dpr-23">[23]</a> 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).

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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/* start https://en.wikipedia.org/ */

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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://rafcamera.com/info/bayonet-mounts/krasnogorsk-2-lens-mount">"Krasnogorsk-2 lens mount"</a>. rafcamera.com. Retrieved 2024-05-20.</cite>

</li>

<li id="cite_note-2"><a href="#cite_ref-2">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://cinematography.com/index.php?/forums/topic/18803-seeking-knowledge-and-user-experiences-with-the-kinor-sp16/">"Seeking knowledge and user experiences with the Kinor SP16"</a>. Cinematography.com. 2006-11-21. Retrieved 2024-05-20.</cite>

</li>

<li id="cite_note-3"><a href="#cite_ref-3">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://cinematography.com/index.php?/forums/topic/44309-k-3-bayonet-question/">"K-3 bayonet question"</a>. Cinematography.com. 2010-02-07. Retrieved 2024-05-20.</cite>

</li>

<li id="cite_note-:0-4">^ <a href="#cite_ref-:0_4-0">a</a> <a href="#cite_ref-:0_4-1">b</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://cinematography.com/index.php?/forums/topic/50185-kinor-16cx-2m-lens-mount-question/">"Kinor 16CX-2M lens mount question"</a>. Cinematography.com. 2011-01-28. Retrieved 2024-05-20.</cite>

</li>

<li id="cite_note-:1-5">^ <a href="#cite_ref-:1_5-0">a</a> <a href="#cite_ref-:1_5-1">b</a> <cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://cameramarket.eu/data/pdf/cameramarket_Lens%20mounts%20and%20flange%20focal%20distances.pdf">Lens mounts and flange focal distances</a> (PDF). p. 3.</cite>

</li>

<li id="cite_note-6"><a href="#cite_ref-6">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20080724013410/http://www.canon.com/camera-museum/history/canon_story/1987_1991/1987_1991.html">"Camera Story – 1987–1991 EOS"</a>. <a href="Canon_(company)" class="mw-redirect" title="Canon (company)">Canon</a>. Archived from <a rel="nofollow" class="external text" href="http://www.canon.com/camera-museum/history/canon_story/1987_1991/1987_1991.html">the original</a> on 2008-07-24. Retrieved 2008-07-22.</cite>

</li>

<li id="cite_note-7"><a href="#cite_ref-7">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://imaging.nikon.com/history/chronicle/history-f/index.htm">"Debut of Nikon F"</a>. <a href="Nikon_(company)" class="mw-redirect" title="Nikon (company)">Nikon</a>. Retrieved 2024-04-14.</cite>

</li>

<li id="cite_note-8"><a href="#cite_ref-8">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://imaging.nikon.com/history/chronicle/history-f/index.htm">"Debut of Nikon F"</a>. <a href="Nikon_(company)" class="mw-redirect" title="Nikon (company)">Nikon</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200812162248/https://imaging.nikon.com/history/chronicle/history-f/index.htm">Archived</a> from the original on 2020-08-12. Retrieved 2020-10-26.</cite>

</li>

<li id="cite_note-DJI_DL_mount_lenses-9">^ <a href="#cite_ref-DJI_DL_mount_lenses_9-0">a</a> <a href="#cite_ref-DJI_DL_mount_lenses_9-1">b</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://iso3200.org/blog/references/dl-mount-lenses/">"DJI DL mount lenses"</a>. iso3200.org. Retrieved 2024-09-09.</cite>

</li>

<li id="cite_note-10"><a href="#cite_ref-10">^</a> <cite id="CITEREFHornberg2007" class="citation book cs1">Hornberg, Alexander (2007-02-27). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=HEy4UBoGF2UC&q=cs-mount+%2212.526%22&pg=PA49">Handbook of Machine Vision</a>. John Wiley & Sons. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>9783527610143</bdi>.</cite>

</li>

<li id="cite_note-11"><a href="#cite_ref-11">^</a> The M42 (Praktica) mount is sometimes referred to as a "P" thread. See, e.g., <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.questarcorporation.com/acc.htm#camera">"Questar Corporation: Photographic Camera Adapters "P" Thread"</a>. Retrieved 2017-03-01.</cite>

</li>

<li id="cite_note-12"><a href="#cite_ref-12">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.kenrockwell.com/mamiya/6.htm">"Mamiya 6"</a>. www.kenrockwell.com.</cite>

</li>

<li id="cite_note-13"><a href="#cite_ref-13">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html">"Camera Mounts Sorted by Register"</a>. www.graphics.cornell.edu. Retrieved 2018-08-23.</cite>

</li>

<li id="cite_note-14"><a href="#cite_ref-14">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.fujifilm.com/products/digital_cameras/gfx/fujifilm_gfx_50s/features/">"FUJIFILM GFX 50S, Features"</a>. <a href="Fujifilm" title="Fujifilm">Fujifilm</a>. Retrieved 2018-05-23.</cite>

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<li id="cite_note-16"><a href="#cite_ref-16">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://pages.mtu.edu/~shene/FORUM/Taiwan-Forum/Lens-Talk/20-Pentax-110-Lens/Pentax-Auto-110.html">"Pentax Auto 110 Lenses"</a>. pages.mtu.edu. Retrieved 2024-11-26.</cite>

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<li id="cite_note-17"><a href="#cite_ref-17">^</a> <cite id="CITEREFBremdebrommer2023" class="citation web cs1">Bremdebrommer (16 December 2023). <a rel="nofollow" class="external text" href="https://www.thingiverse.com/thing:6380505">"Pentax auto 110 to Sony E / FE adapter"</a>. Thingiverse. Retrieved 26 November 2024.</cite>

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<li id="cite_note-18"><a href="#cite_ref-18">^</a> <cite class="citation web cs1 cs1-prop-unfit"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20170930154648/http://www.cctvopticallens.com/">"cctvopticallens-m12 and cs mount lens provider"</a>. www.cctvopticallens.com. Archived from the original on September 30, 2017. Retrieved 3 April 2018.</cite>

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<li id="cite_note-22"><a href="#cite_ref-22">^</a> <cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.four-thirds.org/en/microft/whitepaper.html">"Micro Four Thirds, Standard, Whitepaper (Summary of Standard)"</a>. <a href="Four_Thirds_System" class="mw-redirect" title="Four Thirds System">Four Thirds System</a>. Retrieved 2008-08-11.</cite>

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<div class="mw-heading mw-heading3"><h3 id="Sources">Sources</h3></div>

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<ul><li><cite id="CITEREFMarkerink,_Willem-Jan" class="citation web cs1">Markerink, Willem-Jan. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20071124034629/http://www.a1.nl/phomepag/markerink/mounts.htm">"Camera mounts & registers"</a>. Archived from <a rel="nofollow" class="external text" href="http://www.a1.nl/phomepag/markerink/mounts.htm">the original</a> on 2007-11-24. Retrieved 2007-09-20.</cite></li></ul>

</div>

<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

<ul><li><a rel="nofollow" class="external text" href="http://members.tripod.com/rick_oleson/index-99.html">SLR Mount Identification Guide</a></li>

<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120402205115/http://www.kineoptics.com:80/camera.html">List of Camera, Mount Type and Register for Mechanical & Optical Instruments</a></li>

<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20081221083400/http://medfmt.8k.com/">https://web.archive.org/web/20081221083400/http://medfmt.8k.com/</a>, Camera mounts & registers from Robert Monahan Medium Format Photography Megasite</li>

<li><a rel="nofollow" class="external text" href="http://www.markerink.org/WJM/HTML/mounts.htm">http://www.markerink.org/WJM/HTML/mounts.htm</a>, Camera mounts & registers from Willem-Jan Markerink</li>

<li><a rel="nofollow" class="external text" href="http://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html">Camera Mounts Sorted by Register</a></li>

<li><a rel="nofollow" class="external text" href="http://www.graphics.cornell.edu/~westin/misc/mounts-alphabetical.html">Alphabetical List of Camera Mounts</a></li>

<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20090703235032/http://www.nikonlinks.com/unklbil/nomenclature.htm">Nikon Lens Nomenclature – a study in frustration</a></li>

<li><a rel="nofollow" class="external text" href="http://www.adaptall-2.com/">Adaptall-2.com</a></li>

<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120112031010/http://www.dpreview.com/previews/fujifilmxpro1/">DPReview Hands-on preview of Fujifilm X-Pro1</a></li>

<li><a rel="nofollow" class="external text" href="http://www.dpreview.com/previews/canon-eos-m/">DPreview Hands-on preview of Canon EOS M</a></li>

<li><a rel="nofollow" class="external text" href="http://www.zenitcamera.com/qa/qa-gost10332-72.html">Standard: GOST 10332-72 (in Russian) – M42×1/45.5, M39×1/28.8</a></li>

<li><a rel="nofollow" class="external text" href="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»</a> (in Russian)</li></ul></div><div><div class="zim-footer">

This article is issued from <a class="external text" title="Last edited on 2025-06-26" href="https://en.wikipedia.org/wiki/?title=Lens_mount&oldid=1297519004">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.

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