Mounts and adapters

Lens mounts, explained.

10 native mounts across the catalog. Each page covers what the mount is, when it was introduced, its flange distance, and which mirrorless systems it adapts to.

• Canon FDbreech-lock bayonet · 42mm flange · from 1971Canon FD is a breech-lock bayonet with a 42.0mm register, introduced in 1971 and replaced by the electronic EF mount in 1987.4 lenses · $100 to $320
• Contax/Yashicabayonet · 45.5mm flange · from 1975Contax/Yashica (C/Y) is the 1975 bayonet with a 45.5mm register shared by Carl Zeiss T* lenses and Yashica ML lenses until 2005.3 lenses · $220 to $800
• Konica ARbayonet · 40.5mm flange · from 1965Konica AR is the 1965 bayonet with a 40.5mm register used by Konica Autoreflex SLRs and Hexanon lenses until 1987.2 lenses · $75 to $850
• Leica Rbayonet · 47mm flange · from 1964Leica R is the 1964 bayonet with a 47.0mm register used by the Leicaflex and R3 through R9 SLRs until 2009.2 lenses · $480 to $550
• M39screw thread · 28.8mm flange · from 1930M39, the Leica thread mount (LTM), is a 39mm x 26 tpi screw thread with a 28.8mm register used on Leica, FED, Zorki, and Canon rangefinders.1 lens · $60 to $60
• M42screw thread · 45.46mm flange · from 1949M42 is a 42mm x 1mm screw thread with a 45.46mm register, introduced in 1949 on the Contax S and later adopted by Praktica, Asahi Pentax, Fujica, Zenit, Yashica, and Chinon.15 lenses · $45 to $450
• Minolta SRbayonet · 43.5mm flange · from 1958Minolta SR is the bayonet Minolta used from 1958 to 1985 with a 43.5mm register; MC (1966) and MD (1977) are meter-coupling generations of the same mount.4 lenses · $60 to $480
• Nikon Fbayonet · 46.5mm flange · from 1959Nikon F is the 1959 bayonet with a 46.5mm register that Nikon kept through the pre-AI, AI (1977), AI-S (1981), and autofocus eras.4 lenses · $110 to $600
• Olympus OMbayonet · 46mm flange · from 1972Olympus OM is the compact 1972 bayonet with a 46.0mm register designed by Yoshihisa Maitani for the OM-1 system.3 lenses · $130 to $500
• Pentax Kbayonet · 45.46mm flange · from 1975Pentax K is the 1975 bayonet that replaced M42 while keeping its 45.46mm register, and it remains in use on Pentax DSLRs today.2 lenses · $110 to $480