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The Pentax K-mount, sometimes referred to as the "PK-mount", is a bayonet lens mount standard for mounting interchangeable photographic lenses to 35 mm single-lens reflex (SLR) cameras. It was created by Pentax in 1975, [ 1 ] and has since been used by all Pentax 35 mm and digital SLRs and also the MILC Pentax K-01 .
K, M A F, FA, D-FA FA Powerzoom FA-J DA, DA-L DA-SDM, DA-DCM (KAF3) DA, D-FA (KAF4) Main changes: Camera First K-mount version A-position, electrical contacts Screw drive, with contacts for serial communication Two contacts for Powerzoom Aperture ring abandoned Small image circle In lens autofocus motor electromagnetic aperture control
What set these cameras apart from earlier Pentax ones was the replacement of the M42 "universal" screw-lens mount with a proprietary bayonet mount system, known as the K mount. Still the basis for Pentax lenses and cameras today, the K mount offered greater convenience and enabled the production of faster lenses such as the 50 mm f /1.2 . [ 17 ]
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All Pentax K-mount auto-focus cameras are backward compatible with K-mount lenses dating back as far as 1975 without need for an adapter. Cameras with a "crippled K-Mount" cannot read the set f-stop of K and M series lenses and must stop-down momentarily to meter in case the adjusted aperture is a stopped down one.
Pentax Adapter K for 645 Lens (645 to K mount) Pentax Adapter K for 6x7 Lens (6x7 to K Mount) Pentax Mount Adapter K (M42 Screwmount to K Mount) Rear Converter K T6-2X; Rear Converter-A 1.4x-L; Rear Converter-A 1.4x-S; Rear Converter-A 2x-L; Rear Converter-A 2x-S; SMC Pentax-F 1.7x AF Adapter; Takumar-A 2x Tele-Converter
The Pentax K-mount (or just "PK mount") was created by Pentax in 1975, and has been used by all Pentax 35 mm and digital SLRs since. The mount has been developed over the years, resulting in a large number of designations such as K F mount, K A mount, K AF mount, K AF2 mount and K A2 mount, plus a couple of more recent versions that are not ...
The exceptions are Pentax's newest SMC-Pentax FA J (1997) and SMC-Pentax DA (2004) types which lack an aperture control ring, and K mount lenses designed for APS-C cameras; these can be mounted but with restricted functionality. There are also adaptors to allow older screw mount lenses to be used on K mount cameras (with limitations). In all ...