Lens mount: M39. You can attach your SLR digital camera with right adapter :

CANON: For Canon EOS cameras with an EF / EF-S mount, you need an M42-Canon EOS 

NIKON: For Nikon DX / FX cameras, as well as for Fujifilm and Kodak cameras with Nikon F bayonet, you need an M39-Nikon F 

PENTAX: For Pentax cameras with a bayonet K, an M39-Pentax K 

SONY / MINOLTA: For cameras with Sony / Minolta A bayonet, an M39-Sony A 

OLYMPUS / PANASONIC: For cameras with a 4/3 bayonet, an M39-4 / 3 For mirrorless cameras

SONY: For cameras with the 'E' bayonet of the Sony NEX and Sony Alpha, an M42-Sony E adapter (aka M42-Sonye Nex) is needed, you can find it here. 

OLYMPUS / PANASONIC / KODAK / XIAOMI: For cameras with Micro 4/3 bayonet (Micro 4: 3), you need the M39-Micro 4/3 

CANON: For cameras with a Canon EF-M bayonet, an M39-Canon M 

NIKON 1: For Nikon 1 series cameras, you need the M42-Nikon 1 

FUJIFILM: For cameras with a X bayonet, an M39-Fuji X 

SAMSUNG: For cameras with a NX mount, you need an M39-Samsung NX 

PENTAX: For cameras with a Q bayonet, an M39-Pentax Q a

LEICA: For cameras with a Leica M bayonet, an M39-L / M 

You can also use an adapter m 39 / m 42 and then put an adapter m 42 / sony a on any of these cameras for example ..

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