page_title: Pentax K-mount
section_title: KAF2-mount
hierarchical_section_title: Pentax K-mount / Mounts / KAF2-mount
caption_attribution_description: English: Pentax KAF2 mount (body and lens). 1. alignment marker 2. locking pin 3. lens release button 4. digital lens information contact 5.–10. electrical lens information contacts 11. aperture control lever (closes the aperture) 12. power contacts (power zoom, in-lens autofocus motors) 13. screw-drive auto focus drive shaft 14. aperture simulator (indicates how much a lens is stopped down through the aperture ring) Русский: Байонет KAF2 (на камере и объективе). 1 - индекс 2 - замок 3 - кнопка замка 4-10 - контакты 11 - привод прыгающей диафрагмы 13 - муфта привода автофокуса 14 - механическая передача значения диафрагмы в экспонометр
context_page_description: 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 cameras. It was created by Pentax in 1975, and has since been used by all Pentax 35 mm and digital SLRs and also the MILC Pentax K-01. A number of other manufacturers have also produced many K-mount lenses and K-mount cameras.
context_section_description: The KAF2-mount is the same as the KAF-mount except that it adds two extra power contacts to the inside of the mounting ring and transmits modulation transfer function (MTF) data through the digital seventh contact. The power contacts were originally used for power zooming. Since the introduction of the K10D digital SLR model, they are mainly used for powering Silent Drive Motor and DC motor lenses.
  The K10D/K100D Super and later cameras do not have a mechanical stop-down coupler/indicator and thus can only use stop-down metering on pre-A lenses.
caption: Pentax KAF2 mount (body and lens).  1. alignment marker 2. locking pin 3. lens release button 4. digital lens information contact 5.–10. electrical lens information contacts 11. aperture control lever 12. power contacts 13. screw-drive auto focus drive shaft 14. aperture simulator
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