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The Lens Mount Guide: Part 1

Have you ever found or received a lens and been unsure what type of camera it goes to? Or maybe you're just really into photography and camera equipment and want to fill your brain with gear knowledge. Well today we're kicking off a mini-series on lens mounts. We will be identifying all of the major (common) lens mount types, and then some more uncommon or rare lens mounts as well. It's a visual guide, with photos of each mount type with a short description of what kind of lens mount it is below the image.

Every mount is different- you just have to pay attention to the small details to determine what is what. Look at the contacts (or lack of), the pins, the size of the mount, the grooves, indentations, tabs, mounting dots, screw placements, serial number locations, rear elements, etc. 

Lets start with Part 1: Canon, Nikon, Pentax, and Leica lenses...


Canon Manual Focus (FD), MF 35mm

Canon Manual Focus (FD BL), MF 35mm

Canon Auto-Focus (EOS), AF 35mm

Digital Canon (EF-S), AF D-SLR

Canon Video, AF
Canon Rangefinder (screw mount), MF 35mm
Nikon F (Non-AI), MF 35mm
Nikon F (AI), MF 35mm

Nikon F (AI-S), MF 35mm

Nikon F (AI'd), MF 35mm

Nikon Auto-Focus, AF 35mm

Nikon Digital (AF-S), AF D-SLR

Nikon 1 (new digital mirrorless), AF D-SLR

Nikon Rangefinder, MF 35mm

Nikonos (underwater), MF 35mm

Pentax K, MF 35mm

Pentax Screw Mount, MF 35mm
Pentax Auto-Focus K, AF 35mm

Pentax Digital, AF D-SLR

Pentax 67, MF Medium Format

Pentax 645, MF Medium Format
Pentax 110, MF Subminiature


Leica M: ROM, MF 35mm

Leica S (screw mount), MF 35mm

Leica R: 2-cam, MF 35mm

Leica R: 3-cam, MF 35mm
 
Leica R: 3rd-cam/ R-cam, MF 35mm

Leica R: ROM (3rd-cam), MF 35mm

Leica Visoflex, MF 35mm

Leica Digital (M), MF D-Rangefinder


More Information-

Abbreviations used above:
AF = Auto focus
MF = Manual focus
BL = Breech Lock
D-SLR = Digital Single Lens Reflex

Related articles:
* Nikon F Mount Lenses- Non-AI, AI, AI-S, and AI'd
* Digital Lens Compatibility Part 1, Part 2, Part 3

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Lens Mount Guide:
Part 2
Part 3

The Lens Mount Guide: Part 2

Part 2 in our mini-series Lens Mount Guide: Hasselblad, Minolta, Olympus, Mamiya, Bronica...

Hasselblad, MF Medium Format

Hasselblad Auto-focus, AF Medium Format

Hasselblad 1000F, MF Medium Format

Hasselblad XPAN, MF (Rangefinder) 35mm Panoramic

Minolta, MF 35mm

Minolta Maxxum, AF 35mm

Minolta Digital, AF D-SLR

Olympus, MF 35mm

Olympus Pen, MF 35mm

Olympus Digital E-System (4/3), AF D-SLR

Olympus Digital PEN System (Micro 4/3), AF D-SLR

Mamiya RB, MF Medium Format

Mamiya RZ, AF Medium Format

Mamiya 645, MF Medium Format

Mamiya 645 (N/L LS), MF Medium Format

Mamiya 645 Auto-focus, AF Medium Format

Mamiya 6, MF Medium Format Rangefinder

Mamiya 7, MF Medium Format Rangefinder

Mamiya TLR, MF Medium Format

Bronica ETRS, MF Medium Format

Bronica SQ, MF Medium Format

Bronica GS-1, MF Medium Format


More Information-

Abbreviations used above:
AF = Auto focus
MF = Manual focus
TLR = Twin Lens Reflex
D-SLR = Digital Single Lens Reflex
LS = Leaf Shutter

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Lens Mount Guide:
Part 1
Part 3

The Lens Mount Guide: Part 3

Contax G, AF (Rangefinder) 35mm

Contax 645, AF Medium Format

Contax N, AF 35mm

Contax, MF 35mm

Zeiss Contax Rangefinder, MF 35mm

Zeiss Contaflex, MF 35mm

Zeiss Contarex, MF 35mm

Kodak Retina Reflex, MF 35mm

Kodak Retina, MF (Rangefinder) 35mm

Fuji G690BL, MF Medium Format

Fuji GX680, MF Medium Format
Fuji GX617, MF Panoramic Medium Format

Konica, MF 35mm

Sony Alpha, AF D-SLR

Sony E System (NEX), AF D-SLR

Rollei 35mm (2 pin), MF 35mm

Rollei 35mm (3 pin), MF 35mm

Rollei 35mm (1- chrome pin denotes "1 pin". 2- chrome lever denotes "2 pin". 3- recessed ridge around mount denotes "3 pin"), MF 35mm

Rollei Medium Format, MF Medium Format

Exacta (with shutter release arm/automatic presetting device- not on all Exacta lenses), MF 35mm

Miranda, MF 35mm

Panasonic Digital, AF D-SLR

Sigma Digital (SA mount), AF D-SLR

Topcon, MF 35mm
Topcon (with shutter release arm), MF 35mm

Yashcia, AF 35mm

Tamron Adaptall (without adaptall mount), MF 35mm

Tamron Adaptall (with removable adaptall mount for Nikon), MF 35mm

"T mount" (Screw-on mount adapter)

"TX mount" (TX mount adapter on a lens. Identified by O-L switch on side)

Large Format Lens

Enlarger lens (darkroom)



More Information-

Abbreviations used above:
AF = Auto focus
MF = Manual focus
D-SLR = Digital Single Lens Reflex

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Lens Mount Guide:
Part 1
Part 2

Leica R Lenses: Understanding Cams

Leica R lenses are 35mm manual focus lenses that fit on Leica R SLR bodies. Most the lenses can be used on any Leica reflex camera body in a non-metered mode (they physically fit onto the body). There are different designations that denote the lenses cams, or cam-coupling, which is how meter-coupling is carried out. So in order for the lens aperture information to make it to the camera for proper metering, you must choose the appropriate lens and camera combination.

A '1-cam' or 'single cam' is for original Leicaflex cameras. The cam looks like a sloped and curved chrome bar located in between the lens mount and the rear element of glass. It is not recommended to put these lenses on R8 or R9 cameras because it can damage the cameras ROM contacts.

2 cam

A '2-cam' or 'twin cam' is for the SL and SL2 models and original Leicaflex. The 2 cams on these lenses also look like sloped and curved chrome bars in between the lens mount and the rear element. These lenses are also not recommended to be put on the R8 or R9 cameras. (The 1 and 2 cam lenses can be used on other bodies in stop-down metering mode only.)
3 cam

A '3-cam' or 'triple cam' will work on all Leica SLR models. The 3 cams on these lenses include the 2 cams previously mentioned (the 2 curves chrome bars), plus a 3rdcam that is black, has a 3-tiered step shape, and is located inside the 2nd cam.

3rd cam

close up of the 3rd cam

A '3rd-cam' or 'R-only cam' is for R3 and later models. This lens does not have the 1st or 2ndcam (the chrome bars) at all. It only has the 3rd cam (the black tiered cam) located in between the lens mount and the rear element. These lenses also have a slightly different mount shape that prevents it from fitting on earlier camera models (Leicaflex).

ROM (with 3rd cam)

ROM means that the lens is supplied with electrical contacts. These lenses are for use with the R8 and R9, although they are still compatible with earlier models but without the extra benefits from the contacts. This lens is also a 3rdcam lens, but has a strip of electrical contacts in between the mount and rear element. The contacts allow additional information to be communicated between the lens and the camera, such as the focal length of the lens for flash metering. 


* In the KEH descriptions, we use the terms 2 cam, 3 cam, 3rd cam, and ROM. You can shop the Leica R category here.

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