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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 .
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]
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
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It uses non-proprietary AA batteries like previous Pentax entry-level offerings. The K200D's lens mount is the K-mount. The K200D's on-board flash can be used to allow wireless control of Pentax or compatible flashes as a Master (The on-board flash fires during the capture), or as a Controller (The on-board flash does not fire during the capture).