Originally in the analogue era M-mount lenses were only available from Leica, but soon Cosina/Voigtländer and Zeiss started producing M-mount lenses as well. Today also many newer manufacturers from China release original lenses in M-mount as they can easily be adapted to all kinds of mirrorless cameras.

Reviews

9mm

• Laowa 9mm 5.6 FF-RL

11mm Fisheye

• TTArtisan 11mm 2.8 Fisheye

12mm

• Voigtländer 12mm 5.6 Ultra Wide Heliar (M39)

15mm

• Voigtländer 15mm 4.5 VM Super Wide Heliar II

21mm

• TTArtisan 21mm 1.5
• Voigtländer VM 21mm 3.5 Color-Skopar

24mm

• MS-Optics 24mm 2.0 Aporia

28mm

• 7artisans 28mm 1.4 FE-Plus
• Voigtländer Ultron 28mm 2.0 MK I
• Voigtländer Ultron 28mm 2.0 MK II Type I
• TTArtisan 28mm 5.6 M
• 7Artisans 28mm 5.6 M Wen

35mm

• Voigtländer 35mm 1.2 VM Nokton III
• 7Artisans 35mm 1.4 M IF
• TTArtisan 35mm 1.4
• Leica Summilux 35mm 1.4 FLE Asph
• MS-Optics 35mm 1.4 Apoqualia
• Zeiss ZM Distagon 35mm 1.4 T*
• Voigtlander Ultron 35mm 1.7
• Voigtländer Apo-Lanthar 35mm 2.0
• TTArtisan 35mm 2.0 Apo
• Jupiter-12 35mm 2.8

50mm

• Zhong Yi 50mm 0.95 M
• TTArtisan 50mm 0.95
• MS-Optics 50mm 1.0 ISM
• Syoptic 50mm 1.1
• 7Artisans 50mm 1.1
• MS-Optics 50mm 1.1 Sonnetar
• Voigtlander VM 50mm 1.2 Nokton
• TTArtisan 50mm 1.4
• Nikon Nikkor-S 50mm 1.4
• Zeiss C-Sonnar 50mm 1.5
• Voigtlander VM 50mm 1.5 Nokton
• Voigtländer VM 50mm 1.5 Nokton II MC
• Jupiter-3 50mm 1.5
• Nikon Nikkor-H 50mm 2.0

75mm

• MS-Optics 73mm 1.5 Sonnetar
• Leica Summilux M 75mm 1.4
• Voigtlander Nokton 75mm F1.5
• Voigtlander Heliar 75mm F1.8

85mm

• Jupiter-9 85mm 2.0
• Nikkor-P 85mm 2.0
• Laowa 85mm 5.6 Macro 2:1

90mm

• TTArtisan 90mm 1.25
• Zhong Yi 90mm 1.5
• Leica Summicron-M 90mm 2.0
• Minolta M-Rokkor 90mm 4.0

135mm

• MS-Optics Aporis 135mm 2.4 MC Fluorit
• Leica Apo-Telyt-M 135mm 3.4
• Leica Tele-Elmar M 135mm 4.0
• Jupiter-11 135mm 4.0

Adapters for Sony E-mount cameras

For a general overview have a look at our Adapter guide.

A very interesting adapter for M-mount lenses is the Voigtlander VM-E close focus adapter which works as a variable extension tube and reduces the usually quite high close focusing distance of your Leica M lenses. Nowadays there are also many knockoffs of varying quality available.

A very special adapter is the Techart LM-EA9 that turns your manual focus M-mount lenses into auto focus lenses.

Issues

Most rangefinder lenses (especially wide angle ones) do not perform as well on a digital camera as on film. For a very geeky analysis check out this lensrentals.com article, for a short comprehension have a look at our article Rangefinder wide angle lenses on A7 cameras: problems and solutions.
The most important factor is the filter stack thickness in front of the sensor. Leica has minimized the thickness of this sensor so that most lenses perform closer to film on their Leica M10, M9 or M240 series cameras. Sony uses a much thicker sensor stack with all their A7/A9/A1 series cameras but it can be replaced by a thin one and then the cameras perform as well as the Leicas.