Camera mount flange focal distance and adapter feasibility

Flange focal distance, throat diameter, mount type, sensor format and production years for interchangeable-lens camera mounts. A lens from mount A can be adapted to a body with mount B using a simple (non-optical) adapter when mount A's FFD exceeds mount B's FFD by enough margin for a physical ring. Answers 'can I put my old Minolta lenses on a Sony mirrorless body' and 'does a focal reducer exist for this pairing' — questions assistants answer from memory with approximate numbers they cannot cite.

Records201

Sources4

Verified2026-08-13

Review by2028-08-12

Licencefactual compilation; geometric specifications of camera mounts cited with attributed quotes, no source document reproduced

59 records where two or more sources state different values. Both sides are reproduced on the record page, each with its own source and quote.

The data

Mount name	Flange focal distance (mm)	Mount type	Format	Production years	Throat diameter (mm)
1/2″ TV bayonet mount	35.74 mm	TV	1/2″ 3-CCD
1/2" TV bayonet mount	35.74	TV	1/2" 3-CCD
16-SP	52	Cine	16 mm	1965-1991
1KSR-1M	57	Cine	35 mm
1KSR-2M	61	Cine	35 mm
4/3 (Four Thirds)	38.67	SLR camera
4/3 System digital	38.58	bayonet			44
Aaton mount	40.00	cine	16 mm/S16
Alpa	37.8	bayonet			42
Altix	42.5	breech lock			34
Argussources differ	39	38mm thread			38
Arri Bsources differ	52.00	cine
Arri LPLsources differ	44.00	cine	25.54x36.70 mm	2018-
Arri PLsources differ	52.00	cine
Arri Standard	52.00	cine
Arri STD	52.00 mm	Cine
Asahiflex	45.46	M37×1 thread			37
B4 2/3″ TV bayonet mount	48.00 mm	TV	2/3″ 3-CCD
B4-mount	48.00	TV	2/3" 3-CCD (9.6×5.4 mm)	1992–
Braun Paxette Reflex DKL-mount	45.7	SLR / Mirrorless	24×36 mm
Bronica SQ	85	bayonet			78
C-mountsources differ	17.526	cine / TV	8 mm, 16 mm, 1/3", 1/2", 2/3", 1", 4/3"	~1926–
C/Y (Contax/Yashika)	45.5	SLR 35mm camera
Canon EF-M-mount	18.00 mm	Mirrorless	APS-C	2012–
Canon EF-mountsources differ	44.00 mm	SLR	24×36 mm / APS-H / APS-C	1987–
Canon EF(-S)	44	SLR 35mm and APS-C camera
Canon EF-S-mount	44.00 mm	SLR	APS-C	2003–
Canon EOS	44	bayonet			54
Canon FD-mountsources differ	42.00 mm	SLR	24×36 mm	1971–1990
Canon FL-mountsources differ	42.00 mm	SLR	24×36 mm	1964–1971
Canon R/FL/FD	42	breech or bayonet			48
Canon R (FL, FD, FDn)	42	SLR 35mm camera
Canon RF mountsources differ	20.00 mm	Mirrorless	24×36 mm	2018–
Canon screw	28.8	M39×1 thread			39
Contax 645sources differ	64.00 mm	SLR	6×4.5 cm	1999–
Contax C/Y-mountsources differ	45.50 mm	SLR	24×36 mm	1974–2005
Contax G	29	Rangefinder 35mm camera
Contax G-mountsources differ	29.00 mm	Mirrorless	24×36 mm	1994–2005
Contax G1	29	bayonet			44
Contax Nsources differ	48.00 mm	SLR	24×36 mm	2000–2005
Contax-N	48	SLR 35mm camera
Contax N-mount	48.00 mm	SLR	24X36 mm
Contax RF	34.85	dual bayonet			44
Contax RF-mountsources differ	34.85 mm	Mirrorless	24×36 mm
Contax/Yashica	45.5	bayonet			48
CS-mountsources differ	12.526	TV	1/4", 1/3", 1/2"
D-mountsources differ	12.29	cine	8 mm
DJI DL-mountsources differ	16.84	Mirrorless	Super 35	2017–
Exaktasources differ	44.7 mm	SLR	24×36 mm	1936–1969
Exakta 66	74.1	breech lock			60
Exakta, Topcon	44.7	SLR 35mm camera
Exakta/Topcon RE	44.7	bayonet			46
Fujica X	43.5	bayonet			49
Fujica-X	43.5	SLR 35mm camera
Fujica X-mountsources differ	43.50 mm	SLR	24×36 mm	1980–1985
Fujifilm G-mount	26.7 mm	Mirrorless	Medium Format (127) 43.8×32.9 mm	2017–
Fujifilm G mount	26.7 mm	Mirrorless	Medium Format 43.8×32.9 mm
Fujifilm X-mountsources differ	17.7 mm	Mirrorless	APS-C	2012–
Hasselblad	74.9	Medium format camera
Hasselblad 1000F & 1600F	82.10 mm	SLR	6×6 cm	1948–1957
Hasselblad 1000F/1600F	82.1	multi start thread			78
Hasselblad 1000F / 1600F	82.10 mm	SLR	6X6 cm
Hasselblad 500/2000	74.9	bayonet			69
Hasselblad 500 / 2000	74.90 mm	SLR	6X6 cm
Hasselblad H-mount	61.63 mm	SLR	6×4.5 cm	2002–
Hasselblad V-mount	74.90 mm	SLR	6×6 cm	1957–2013
Hasselblad XCD mountsources differ	18.14 mm	Mirrorless	Medium Format (127) 43.8×32.9 mm	2017–
Hasselblad XPansources differ	34.27 mm	Mirrorless	24×36 mm & 24×65 mm	1998–2003
JVC 1/3″ bayonet mount	25.00 mm	TV	1/3″ 3-CCD
JVC 1/3" bayonet mount	25.00	TV	1/3" 3-CCD (5.24×2.94 mm)
Kiev-16U	31	Cine	16 mm
Kiev 60/Kiev Six	74.1	breech lock			60
Kiev-88, Salut	82.1	Medium format camera
Kiev 88, Salut, Zenit 80	82.1	multi start thread			78
Kiev Automat	44.00	SLR	24x36 mm	1960s-1980s
KMZ Zenit DKL-mountsources differ	47.58	SLR	24×36 mm	1964–1968
Kodak Retina DKL-mountsources differ	45.7 mm	SLR / Mirrorless	24×36 mm / 28×28 mm	1958–1977
Kodak Retina Reflex	44.7	bayonet			38
Konica AR-mountsources differ	40.50 mm	SLR	24×36 mm	1965–1988
Konica Autoreflex	40.5	bayonet			47
Konica F (A/R)	40.5	SLR 35mm camera
Konica F-mountsources differ	40.50 mm	SLR	24×36 mm	1960–1965
Kowa Six/Super 66	79.00 mm	SLR	6×6 cm	1968–1974
L-Mount	20.00 mm	Mirrorless	24×36 mm, APS-C	2014–
Leica L-mount	20.00 mm	Mirrorless	24X36 mm / APS-C
Leica Msources differ	27.95	bayonet			44
Leica M-mountsources differ	27.8 (inner rails) <-> 27.95 (outer rails) mm	Mirrorless	24×36 mm	1954–
Leica M39 mount	28.80 mm	Mirrorless	24X36 mm
Leica m39 screw mount	28.8	Rangefinder 35mm camera
Leica Rsources differ	47	bayonet			49
Leica R-mountsources differ	47.00 mm	SLR	24×36 mm	1964–2009
Leica S-mount	53.00 mm	SLR	45×30 mm	1996–
Leica screw	28.8	M39×26tpi			39
Leitz Visoflex II, III	40	Leica M bayonet			44
LUMIX Panasonic	20.00	Mirrorless	24×36 mm, APS-C	2015–
M37×1	45.46	SLR	24×36 mm	1952-1957
m39	45.2	SLR 35mm camera
M39×1/28.8 mount	28.80 mm	Mirrorless	24×36 mm	1948-1978
M39×26tpi mount	28.80 mm	Mirrorless	24×36 mm
M39x1sources differ	44.00	Mirrorless	24×36 mm	1950s
M42sources differ	45.46 mm	SLR	24X36 mm
M42×1	45.46 mm	SLR	24×36 mm	1949–
M42: Pentax, Praktica, Contax S, …	45.46	M42×1 thread			42
M58×0.75 mm mount	12	Industrial	24×36 mm
Mamiya 6	56.20 mm	Mirrorless	6×6 cm	1989–1995
Mamiya 645sources differ	63.30 mm	SLR	6×4.5 cm	1975–
Mamiya 7	59.00 mm	Mirrorless	6×7 cm	1995–2014
Mamiya 7/7II	59	bayonet			49
Mamiya RBsources differ	112.00 mm	SLR	6×7 cm	1970–
Mamiya RB67	111.00 mm	SLR	6X7 cm
Mamiya RZsources differ	105.00 mm	SLR	6×7 cm	1982–
Mamiya RZ67	105.00 mm	SLR	6X7 cm
Mamiya/Sekor E	43.5	bayonet			49
Mamiya Z	45.50 mm	SLR	24×36 mm	1980–
Micro 4/3 (Micro Four Thirds)	20	Mirrorless (Evil) camera
Micro Four Thirds	19.25 mm	Mirrorless	17.3 x 13 mm
Micro Four Thirds System	19.25 mm	Mirrorless	4/3"	2008–
Mini T-mount	55.00	SLR	24×36 mm	1957–1962
Minolta AF/Sony Alpha	44.5	bayonet			49.7
Minolta / Konica Minolta / Sony A-mount	44.50 mm	SLR	24×36 mm	1985–
Minolta MC/MD mount	43.50 mm	SLR	24X36 mm
Minolta / Sony A-mount	44.50 mm	SLR	24X36 mm / APS-C
Minolta SR/MC/MDsources differ	43.72	bayonet			41
Minolta SR-mount	43.50 mm	SLR	24×36 mm	1958–2001
Minolta V-mount	36.00 mm	SLR	APS-H	1996–1999
С-mount	17.526	Movie camera 16mm
Nikon 1	17	bayonet			40
Nikon 1-mountsources differ	17.00 mm	Mirrorless	CX	2011–2018
Nikon F	46.5	bayonet			44
Nikon F (FX, DX)	46.5	SLR 35mm and APS-C camera
Nikon F-mountsources differ	46.50 mm	SLR	24×36 mm / APS-C	1959–
Nikon rangefinder	34.85	bayonet			49
Nikon S-mountsources differ	34.85 mm	Mirrorless	24×36 mm	1947–2005
Nikon Z-mountsources differ	16 mm	Mirrorless	24×36 mm (FX)	2018–
Nikonossources differ	39.00 mm	underwater	24x36 mm	1963-2001
Novoflex A-mount	63.3	SLR
OCT-19	61.00	cine
Olympus Four Thirds System	38.67 mm	SLR	4/3"	2003–2017
Olympus OMsources differ	46	bayonet			46
Olympus OM-mountsources differ	46.00 mm	SLR	24×36 mm	1972–2002
Olympus PEN F	28.95 mm	SLR	18×24 mm
Olympus PEN F (film)	28.95 mm	SLR	18×24 mm	1963–1972
Panavision PV-mountsources differ	57.15	cine		1972–
Panavision SP70-mount	38.00	cine		2018–
Pentacon 6	74.1	breech lock			60
Pentacon Sixsources differ	74.1 mm	SLR	6×6 cm	1956–1992
Pentaflex	44.00 mm	Cine	16 mm
Pentaflex (16 mm cameras)	44.00	cine
Pentax 6×7sources differ	84.95 mm	SLR	6×7 cm	1969–1999
Pentax 645sources differ	70.87 mm	SLR	6×4.5 cm	1984–
Pentax 6X7	85.00 mm	SLR	6X7 cm
Pentax Auto 110sources differ	27.00	SLR	13×17 mm	1978–1985
Pentax K	45.46	bayonet			44
Pentax K (KA, KAF)	45.5	SLR 35mm and APS-C camera
Pentax K-mountsources differ	45.46 mm	SLR / Mirrorless	24×36 mm / APS-C	1975–
Pentax Q-mountsources differ	9.2 mm	Mirrorless	1/2.3" (6.17×4.55 mm) / 1/1.7"	2011–2019
Petri	45.5	bayonet			43
Petri Bayonet	43.50 mm	SLR	24×36 mm
Praktica B	44.4	SLR 35mm camera
Praktica B-mountsources differ	44.40 mm	SLR	24×36 mm	1978–1990
Praktiflex	44	M40×1 thread			40
Praktina	50	breech lock			46
RED ONE	27.30 mm	Cine	Cine
RED ONE interchangeable mount	27.30	cine
Ricoh 126C-Flex	62.22 mm	SLR	24×24 mm	1968-1969
Rollei QBM	44.50 mm	SLR	24×36 mm	1970–
Rollei SL66sources differ	102.80 mm	SLR	6×6 cm	1966–1992
Rollei SLXsources differ	74.00 mm	SLR	6×6 cm	1976–2005
Rollei / Voigtlander QBM	44.50 mm	SLR	24X36 mm
Rolleiflex SL35 (QBM)	44.6	bayonet			49.7
Salyut/Kiev mount	82.10 mm	SLR	6×6 cm	1972–1980
Samsung Kenox mount	44.50	SLR	24×36 mm	1997–2002
Samsung NX	25.5	Mirrorless (Evil) camera
Samsung NX mini	6.95	Mirrorless	1" (8.80x13.20mm)	2014–2015
Samsung NX-mount	25.50 mm	Mirrorless	APS-C	2010–2015
Sigma SA	44	SLR APS-C camera
Sigma SA-mountsources differ	44.00 mm	SLR	24×36 mm / APS-C	1992–
Sony 1/2″ TV bayonet mount	38.00 mm	TV	1/2″ 3-CCD
Sony 1/2" TV bayonet mount	38.00	TV	1/2" 3-CCD
Sony A / Minolta A	44.5	SLR 35mm and APS-C camera
Sony E-mountsources differ	18.00 mm	Mirrorless	24×36 mm	2010–
Sony E (NEX)	18	Mirrorless (Evil) camera
Sony FZ-mountsources differ	19.00	cine	Super 35	2011–
Start (Soviet SLR)	42.00	SLR	1958–1964
T-mountsources differ	55.00 mm	SLR	24×36 mm	1962–
Tamron Adaptall/Adaptall-2	50.7 mm	SLR	24×36 mm	1973-2006
Tamron (T2, T-mount, T-thread)	55	SLR 35mm camera
Vivitar TX	56.25 mm	SLR	24×36mm	1976-
Voigtländer Bessamatic	44.7	bayonet			38
Voigtländer Bessamatic DKL-mount	45.7 mm	SLR	24×36 mm	1958–1967
Voigtländer Vitessa T DKL-mount	45.7	Mirrorless	24×36 mm
Voigtlander Bessamatic DKL	45.70 mm	SLR	24X36 mm
Voigtlander Vitessa T DKL	45.70 mm	Mirrorless	24X36 mm
Werra	54	breech lock			44.5
Yashica MA-mountsources differ	45.80	SLR	24×36 mm
Yashica Pentamatic, Pentamatic II	43	bayonet			47
YS mountsources differ	55.00	SLR	24×36 mm	–1969
Zenza Bronica ETR	69.00 mm	SLR	6×4.5 cm	1976–2004
Zenza Bronica GS	85.00 mm	SLR	6×7 cm	1983–2002
Zenza Bronica S2A	101.70 mm	SLR	6×6 cm	1959–1980
Zenza Bronica SQ	85.00 mm	SLR	6×6 cm	1980–2003

Where this came from

Every record above links the page it was taken from and quotes the sentence that states it. These are the 4 sources this dataset was assembled from.

briansmith.comhttps://briansmith.com/flange-focal-distance-guide/
en.wikipedia.orghttps://en.wikipedia.org/wiki/Flange_focal_distance
allphotolenses.comhttps://allphotolenses.com/articles/item/c_6.html
graphics.cornell.eduhttps://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html

Machine-readable

data.jsonThe whole dataset — every record with its source URL and source quote.
Open Knowledge Format bundleOne JSON object per line — every record's frontmatter and quoted span exactly as it is held here, in one fetch.
How this is made and checkedWhat "verified against source" does and does not mean.

201 records. last verified against source 2026-08-13. due for re-check by 2028-08-12.

Licence. factual compilation; geometric specifications of camera mounts cited with attributed quotes, no source document reproduced