lens mount cross-compatibility table

introduction

lenses with long flange distances such as Leica-R, Nikon F and Olympus OM can be used on most digital cameras with interchangeable lenses.
Olympus OM lenses are much sought after not just because they can fit nearly any camera (except Nikon), but they are beautifully made and compact.
Nikon dSLRs with their long lens mount flange are the LEAST adaptable, and really you are almost stuck with only using Nikon mount lenses on these cameras.
if you want the most fun with legacy lenses, buy a mirrorless camera systems
not included in the table below is the new Canon EF-M mount which has a 18mm flange distance and a 58mm diameter mount, adapter is available to allow mounting EF-S and EF lenses
the old 8mm D-mount cine lenses (eg. Wollensak) can really only be used on Pentax Q cameras, although they can be used on Micro Four Thirds system via a D-mount to C-mount adapter then a C-mount to M43 adapter, but you cannot gain infinity focus (perhaps maximum focus is about 2 feet), and there will be vignetting. You will have better results with the C-mount lenses.
- see using cine lenses on Micro Four Thirds cameras

full frame mirrorless update:
- Nikon Z system has 16mm flange distance and AF adapter is now available for Sony FE lenses!
  - this is now THE MOST adaptable camera system available
- Canon R system has a 20mm flange distance

Lens mount	flange	MicroFourThirds	Sony NEX	Samsung NX	Four Thirds	Canon EF-S	Canon EF	Nikon DX	Nikon FX
crop factor		2x	1.5x	1.6x	2x	1.6x	1.0x	1.5x	1.0x
flange distance		20mm	18mm	25.5mm	38.7mm	44mm	44mm	46.5mm	46.5mm
Pentax Q	9.2mm	N	N	N	N	N	N	N	N
D-mount	12.29mm	N	N	N	N	N	N	N	N
C-mount	17.5mm	N	N	N	N	N	N	N	N
Sony E	18mm	N	AF	N	N	N	N	N	N
MicroFourThirds	20mm	AF	N?	N	N	N	N	N	N
Bolex 16mm	23.2mm	Y	Y?	N	N	N	N	N	N
Samsung NX	25.5mm	N?	N?	AF	N	N	N	N	N
RED ONE	27.3mm	Y?	Y?	N	N	N	N	N	N
Leica-M	27.8mm	Y	Y	N	N	N	N	N	N
Konica Hexar RF KM	28mm	Y	Y	N?	N	N	N	N	N
Leica M39 screw	28.8mm	Y	Y	N?	N	N	N	N	N
Contax G	29mm	Y	Y	N	N	N	N	N	N
Nikon S rangefinder	34.85mm	Y	Y	Y?	Y?	N	N	N	N
Four Thirds	38.7mm	AF	N?	N?	AF	N	N	N	N
Konica AR/F	40.7mm	Y	Y	Y	Y#	N	N	N	N
Canon R/FL/FD	42mm	Y	Y	Y	Y	O	O	N	N
Minolta SR/MC/MD	43.5mm	Y	Y	Y	Y	N	N	N	N
Fujica X	43.5mm	Y	Y	Y	Y	N	N	N	N
Canon EF-S	44mm	AF1	Y	Y	Y	AF	N	N	N
Canon EF	44mm	AF1	Y	Y	Y	AF	AF	N	N
Exacta/Topcon	44.7mm	Y	Y	Y	Y	O	O	N	N
Minolta/Sony A	44.5mm	Y	AF	Y	Y	N	N	N	N
Pentax K / M42	45.5mm	Y	Y	Y	Y	Y	Y	N	N
Contax C/Y	45.5mm	Y	Y	Y	Y	Y	Y	N	N
Olympus OM	46mm	Y	Y	Y	Y	Y	Y	N	N
Nikon DX	46.5mm	Y/shift	Y	Y	Y	Y	Y	AF	N
Nikon F	46.5mm	Y/shift	Y	Y	Y	Y	Y	AF	AF
Leica-R	47mm	Y	Y	Y	Y	Y	Y	N	N
Arri PL	52mm	Y	Y	Y	Y	Y	Y	Y	Y
T2 mount	55mm	Y	Y	Y	Y	Y	Y	Y	Y

# = mount may need minor modication
AF = AF lenses will in general be AF capable
AF1 = AF possible via Birger AF mount
Y = adapter should be available for manual focus and manual aperture BUT some lenses with protruding rear elements may have problems with the mirror in some dSLRs, particularly those with a large mirror such as the Canon 5D.
- The following Leica R lenses are reported to have mirror clearance issues with most if not all adapted EOS cameras: 15/3.5, 16/2.8, 19/2.8 Second Version, 21/4 Mirror Lock Up Version, 35/1.4, 35-70/2.8, 80-200/4.5 First Version. The 24/2.8 and 28-70/3.5-4.5 (2nd version) will not work on the EOS 5D because the rear element protective guard hits the mirror. The 21-35/3.5 Aspherical and 28-90/2.8-4.5 Aspherical is reported not to work on the 1Ds Mk II.
- the following adapted Contax C/Y lenses are not compatible with the EOS 5D: 18/4, 85/1.2, and 135/2.
- The Nikkor 20/2.8 AIS and 24/2.8 AIS are reported to be incompatible with the 5D due to the protruding rear element.
- Nikkor mirror lock up lenses which will not work on Canon EOS include the 6/5.6, 7.5/5.6, and 21/4 Nikkors
Y/shift = normal adapters and tilt-shift adapters available
O = an adapter with optical elements is available but image quality suffers
NOTE: some lenses (most digital lenses) do not have aperture rings and thus aperture may not be able to be adjusted unless special adapters, or, techniques to preset an aperture