Pentax K mount lenses

Pentax K mount

K mount was co-developed by Pentax and Carl Zeiss in the early 1970s, released by Pentax in 1975 after Carl Zeiss dropped out of the partnership. It is a bayonet mount with three lugs, made for 35mm film format, with a focal flange distance of 45.46mm. Mount supports electric and digital communication, film, and digital sensors, both APS‍‍-‍‍C and 35mm. Aperture is usually controlled mechanically, with a lens clutch, but it can be controlled electromagnetically on digital cameras made since 2016. Focus can be achieved manually, as well as automatically – mount supports screw-drive and digital focus control with lenses with built-in focus motors. There are contacts for power delivery, used for powering Power Zoom, in-lens focus motors, and in-lens stabilization. In-lens stabilization is available only in some 3rd party lenses. The manual focus and aperture automation variant of the mount does not need licensing.


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K-series, M-series, A-series, F-series, FA-series, DA-series, D FA-series, Terminology.


K-series

K-series lenses are fully mechanical, manual focus lenses, with no aperture automation available. Provide aperture priority and manual mode to the camera. Built from 1975 to 1977.

  • smc Pentax Fish-Eye 8.4mm F2.8
  • smc Pentax 15mm F3.5
  • smc Pentax 15mm F3.5 AL
  • smc Pentax Fish-Eye 17mm F4
  • smc Pentax 18mm F3.5
  • smc Pentax 20mm F4
  • smc Pentax 24mm F2.8
  • smc Pentax 24mm F3.5
  • smc Pentax 28mm F2
  • smc Pentax 28mm F3.5
  • smc Pentax Shift 28mm F3.5
  • smc Pentax Zoom 28–‍50mm F3.5–‍4.5
  • smc Pentax 30mm F2.8
  • smc Pentax 35mm F2
  • smc Pentax 35mm F3.5
  • smc Pentax AF Zoom 35–‍70mm F2.8
  • smc Pentax Zoom 45–‍125mm F4
  • smc Pentax 50mm F1.2
  • smc Pentax 50mm F1.4
  • smc Pentax Macro 50mm F4
  • smc Pentax 55mm F1.8
  • smc Pentax 55mm F2
  • smc Pentax 85mm F1.8
  • smc Pentax Soft 85mm F2.2
  • smc Pentax Zoom 80–‍200mm F4.5
  • smc Pentax Zoom 85–‍210mm F3.5
  • smc Pentax Zoom 85–‍210mm F4.5
  • smc Pentax Bellows 100mm F4
  • smc Pentax Macro 100mm F4
  • smc Pentax 105mm F2.8
  • smc Pentax 120mm F2.8
  • smc Pentax 135mm F2.5
  • smc Pentax 135mm F3.5
  • smc Pentax Zoom 135–‍600mm F6.7
  • smc Pentax 150mm F4
  • smc Pentax 200mm F2.5
  • smc Pentax 200mm F4
  • smc Pentax 300mm F4
  • smc Pentax 400mm F5.6
  • smc Pentax Reflex Zoom 400–‍600mm F8–‍12
  • smc Pentax 500mm F4.5
  • smc Pentax 1000mm F8
  • smc Pentax Reflex 1000mm F11
  • smc Pentax Reflex 2000mm F13.5

M-series

M-series lenses are fully mechanical, manual focus lenses, with no aperture automation available. Provide aperture priority and manual mode to the camera. Built from 1977 to 1983. Lenses are redesigned to be smaller and lighter than K-series, with smaller diameter filter threads.

  • smc Pentax-M 20mm F4
  • smc Pentax-M Zoom 24–‍35mm F3.5
  • smc Pentax-M Zoom 24–‍50mm F4
  • smc Pentax-M 28mm F2
  • smc Pentax-M 28mm F2.8 🔗
  • smc Pentax-M 28mm F3.5
  • smc Pentax-M Zoom 28–‍50mm F3.5–‍4.5
  • smc Pentax-M 35mm F1.4
  • smc Pentax-M 35mm F2
  • smc Pentax-M 35mm F2.8 🔗
  • smc Pentax-M Zoom 35–‍70mm F2.8–‍3.5
  • smc Pentax-M 40mm F2.8 🔗
  • smc Pentax-M Zoom 40–‍80mm F2.8–‍4 🔗
  • smc Pentax-M 50mm F1.4 🔗
  • smc Pentax-M 50mm F1.7 🔗
  • smc Pentax-M 50mm F2 🔗
  • smc Pentax-M Macro 50mm F4 🔗
  • smc Pentax-M Zoom 75–‍150mm F4 🔗
  • smc Pentax-M Zoom 80–‍200mm F4.5 🔗
  • smc Pentax-M 85mm F2
  • smc Pentax-M 100mm F2.8 🔗
  • smc Pentax-M Macro 100mm F4
  • smc Pentax-M 120mm F2.8
  • smc Pentax-M 135mm F3.5 🔗
  • smc Pentax-M 150mm F3.5
  • smc Pentax-M 200mm F4 🔗
  • smc Pentax-M 300mm F4
  • smc Pentax-M 400mm F5.6
  • smc Pentax-M Reflex 2000mm F13.5

A-series

A-series lenses are manual focus lenses, but this time with electric contacts on the lens mount and A setting on the aperture ring, providing aperture automation to the camera, enabling shutter priority and program modes, along with aperture priority and manual mode. Built from 1983 to 1989. Lenses are redesigned with a tapered front body.

  • smc Pentax-A 15mm F3.5
  • smc Pentax-A Fish-Eye 16mm F2.8
  • smc Pentax-A 20mm F2.8
  • smc Pentax-A 24mm F2.8
  • smc Pentax-A Zoom 24–‍50mm F4
  • smc Pentax-A 28mm F2
  • smc Pentax-A 28mm F2.8
  • smc Pentax-A Zoom 28–‍80mm F3.5-4.5
  • smc Pentax-A Zoom 28–‍135mm F4
  • smc Pentax-A 35mm F2
  • smc Pentax-A 35mm F2.8
  • smc Pentax-A Zoom 35–‍70mm F3.5–‍4.5
  • smc Pentax-A Zoom 35–‍70mm F4
  • smc Pentax-A Zoom 35–‍80mm F4–‍5.6
  • smc Pentax-A Zoom 35–‍105mm F3.5
  • smc Pentax-A Zoom 35–‍135mm F3.5–‍4.5
  • smc Pentax-A Zoom 35–‍210mm F3.5–‍4.5
  • smc Pentax-A 50mm F1.2
  • smc Pentax-A 50mm F1.4
  • smc Pentax-A 50mm F1.7 🔗
  • smc Pentax-A 50mm F2
  • smc Pentax-A Macro 50mm F2.8
  • smc Pentax-A Zoom 70–‍210mm F4
  • smc Pentax-A Zoom 80–‍200mm F4.7–‍5.6
  • smc Pentax-A 85mm F1.4
  • smc Pentax-A 100mm F2.8
  • smc Pentax-A Macro 100mm F2.8
  • smc Pentax-A Macro 100mm F4
  • smc Pentax-A 135mm F1.8
  • smc Pentax-A 135mm F2.8
  • smc Pentax-A 200mm F2.8 ED
  • smc Pentax-A 200mm F4
  • smc Pentax-A Macro 200mm F4 ED
  • smc Pentax-A 300mm F2.8 ED [IF]
  • smc Pentax-A 300mm F4
  • smc Pentax-A 400mm F2.8 ED [IF]
  • smc Pentax-A 500mm F5.6
  • smc Pentax-A 600mm F5.6 ED [IF]
  • smc Pentax-A 1200mm F8 ED [IF]

F-series

F-series lenses are the first generation of autofocus lenses, with all the functionalities of the previous generations. F-series lenses have an additional information pin for digital data transfer with compatible bodies. Built from 1989 to 1991. Lenses have a focus drive shaft, thin, hard plastic focus ring, and are usually grey colored.

  • smc Pentax-F Fish-Eye 17–‍28mm F3.5–‍4.5
  • smc Pentax-F Zoom 24–‍50mm F4
  • smc Pentax-F 28mm F2.8
  • smc Pentax-F Zoom 28–‍80mm F3.5–‍4.5
  • smc Pentax-F Zoom 35–‍70mm F3.5–‍4.5 🔗
  • smc Pentax-F Zoom 35–‍80mm F4–‍5.6
  • smc Pentax-F Zoom 35–‍105mm F4–‍5.6
  • smc Pentax-F Zoom 35–‍135mm F3.5–‍4.5
  • smc Pentax-F 50mm F1.4
  • smc Pentax-F 50mm F1.7
  • smc Pentax-F Macro 50mm F2.8
  • smc Pentax-F Zoom 70–‍210mm F4–‍5.6
  • smc Pentax-F 80–‍200mm F4.7–‍5.6
  • smc Pentax-F Soft 85mm F2.8
  • smc Pentax-F Macro 100mm F2.8
  • smc Pentax-F Zoom 100–‍300mm F4.5–‍5.6
  • smc Pentax-F 135mm F2.8 [IF]
  • smc Pentax-F Zoom 250–‍600mm F5.6 ED [IF]
  • smc Pentax-F 300mm F4.5 ED [IF]
  • smc Pentax-F 600mm F4 ED [IF]

FA-series

FA-series lenses are the second generation of autofocus lenses, with all the functionalities of the previous generations. FA-series lenses have their MFT-chart stored in the lens, compatible bodies can use it in Program modes. Some zoom lenses came with Power Zoom functionality that requires an additional two contacts for power delivery. There were sub-series lenses marked as FA J, those lenses no longer have an aperture ring, they behave as permanently locked in A position. Built from 1991 to 2007. Lenses have a focus drive shaft, a bit softer and a bit larger focus ring, and are usually very dark grey/almost black colored.

  • smc Pentax-FA J 18–‍35mm F4–‍5.6 AL
  • smc Pentax-FA 20mm F2.8
  • smc Pentax-FA 20–‍35mm F4 AL
  • smc Pentax-FA 24mm F2 AL [IF]
  • smc Pentax-FA 24–‍90mm F3.5–‍4.5 AL [IF]
  • smc Pentax-FA 28mm F2.8 AL 🔗
  • smc Pentax-FA 28mm F2.8 Soft
  • smc Pentax-FA 28–‍70mm F2.8 AL PZ
  • smc Pentax-FA 28–‍70mm F4 AL 🔗
  • smc Pentax-FA 28–‍80mm F3.5–‍4.7 PZ 🔗
  • smc Pentax-FA 28–‍80mm F3.5–‍5.6
  • smc Pentax-FA 28–‍80mm F3.5–‍5.6 AL
  • smc Pentax-FA J 28–‍80mm F3.5–‍5.6 AL
  • smc Pentax-FA 28–‍90mm F3.5–‍5.6 🔗
  • smc Pentax-FA 28–‍105mm F3.2–‍4.5 AL [IF]
  • smc Pentax-FA 28–‍105mm F4–‍5.6 PZ
  • smc Pentax-FA 28–‍105mm F4–‍5.6 [IF]
  • smc Pentax-FA 28–‍200mm F3.8–‍5.6 AL [IF]
  • smc Pentax-FA 31mm F1.8 Limited
  • smc Pentax-FA 35mm F2 AL
  • smc Pentax-FA 35–‍80mm F4–‍5.6
  • smc Pentax-FA 43mm F1.9 Limited 🔗
  • smc Pentax-FA 50mm F1.4 🔗
  • smc Pentax-FA 50mm F1.7
  • smc Pentax-FA 50mm F2.8 Macro
  • smc Pentax-FA 70–‍200mm F4–‍5.6 PZ 🔗
  • smc Pentax-FA J 75–‍300mm F4.5–‍5.8 AL
  • smc Pentax-FA 77mm F1.8 Limited
  • smc Pentax-FA 80–‍200mm F2.8 ED [IF] PZ
  • smc Pentax-FA 80–‍200mm F4.7–‍5.6
  • smc Pentax-FA 80–‍320mm F4.5–‍5.6
  • smc Pentax-FA 85mm F1.4
  • smc Pentax-FA 85mm F2.8 Soft
  • smc Pentax-FA 100mm F2.8 Macro 🔗
  • smc Pentax-FA 100mm F3.5 Macro
  • smc Pentax-FA 100–‍300mm F4.5–‍5.6 PZ
  • smc Pentax-FA 100–‍300mm F4.7–‍5.8
  • smc Pentax-FA 135mm F2.8 [IF]
  • smc Pentax-FA 200mm F2.8 ED [IF]
  • smc Pentax-FA 200mm F4 Macro ED [IF]
  • smc Pentax-FA 250–‍600mm F5.6 ED [IF] PZ
  • smc Pentax-FA 300mm F2.8 ED [IF]
  • smc Pentax-FA 300mm F4.5 ED [IF]
  • smc Pentax-FA 400mm F5.6 ED [IF]
  • smc Pentax-FA 600mm F4 ED [IF]

DA-series

DA-series lenses are made for digital cameras with APS‍-‍C sized sensor. Lenses are mostly compatible with FA-series. Some lenses have an electromagnetic aperture, not connected mechanically like all previous lenses, meaning most older cameras cannot control the aperture. Built from 2007. HD DA versions are considered here the same since the difference is minor – rounded aperture blades, updated coatings, different naming schemes, and colors.

  • smc Pentax-DA 10–‍17mm F3.5–‍4.5 Fish-Eye ED [IF] ~15–‍26mm-equivalent
  • smc Pentax-DA 11–‍18mm F2.8 ED DC AW ~17–‍28mm-equivalent
  • smc Pentax-DA 12–‍24mm F4 ED AL [IF] ~18–‍36mm-equivalent
  • smc Pentax-DA 14mm F2.8 ED [IF] ~21mm-equivalent
  • smc Pentax-DA 15mm F4 ED AL Limited 23mm-equivalent
  • smc Pentax-DA 16–‍45mm F4 ED AL [IF] 🔗 ~24–‍70mm-equivalent
  • smc Pentax-DA 16–‍50mm F2.8 ED AL [IF] SDM ~24–‍75mm-equivalent
  • smc Pentax-DA 16–‍50mm F2.8 ED PLM AW ~24–‍75mm-equivalent
  • smc Pentax-DA 16–‍85mm F3.5–‍5.6 ED DC WR ~24–‍130mm-equivalent
  • smc Pentax-DA 17–‍70mm F4 AL [IF] SDM ~26–‍105mm-equivalent
  • smc Pentax-DA 18–‍50mm F4–‍5.6 DC WR RE ~28–‍75mm-equivalent
  • smc Pentax-DA L 18–‍50mm F4–‍5.6 DC WR RE ~28–‍75mm-equivalent
  • smc Pentax-DA 18–‍55mm F3.5–‍5.6 AL 🔗 ~28–‍85mm-equivalent
  • smc Pentax-DA 18–‍55mm F3.5–‍5.6 AL II ~28–‍85mm-equivalent
  • smc Pentax-DA 18–‍55mm F3.5–‍5.6 AL WR ~28–‍85mm-equivalent
  • smc Pentax-DA L 18–‍55mm F3.5–‍5.6 AL ~28–‍85mm-equivalent
  • smc Pentax-DA L 18–‍55mm F3.5–‍5.6 AL WR ~28–‍85mm-equivalent
  • smc Pentax-DA 18–‍135mm F3.5–‍5.6 ED AL [IF] DC WR ~28–‍205mm-equivalent
  • smc Pentax-DA 18–‍250mm F3.5–‍6.3 ED AL [IF] ~28–‍380mm-equivalent
  • smc Pentax-DA 18–‍270mm F3.5–‍6.3 ED SDM ~28–‍410mm-equivalent
  • smc Pentax-DA 20–‍40mm F2.8–‍4 Limited DC WR ~30–‍60mm-equivalent
  • smc Pentax-DA 21mm F3.2 Limited 32mm-equivalent
  • smc Pentax-DA 35mm F2.4 AL ~50mm-equivalent
  • smc Pentax-DA 35mm F2.8 Limited Macro 🔗 ~50mm-equivalent
  • smc Pentax-DA 40mm F2.8 Limited ~60mm-equivalent
  • smc Pentax-DA 40mm F2.8 XS ~60mm-equivalent
  • smc Pentax-DA 50mm F1.8 ~75mm-equivalent
  • smc Pentax-DA 50–‍135mm F2.8 ED [IF] SDM 🔗 ~75–‍205mm-equivalent
  • smc Pentax-DA 50–‍200mm F4–‍5.6 ED ~75–‍300mm-equivalent
  • smc Pentax-DA L 50–‍200mm F4–‍5.6 ED ~75–‍300mm-equivalent
  • smc Pentax-DA 50–‍200mm F4–‍5.6 ED WR ~75–‍300mm-equivalent
  • smc Pentax-DA L 50–‍200mm F4–‍5.6 ED WR ~75–‍300mm-equivalent
  • smc Pentax-DA 55mm F1.4 SDM ~85mm-equivalent
  • smc Pentax-DA 55–‍300mm F4–‍5.8 ED 🔗 ~85–‍450mm-equivalent
  • smc Pentax-DA 55–‍300mm F4–‍5.8 ED WR ~85–‍450mm-equivalent
  • smc Pentax-DA L 55–‍300mm F4–‍5.8 ED ~85–‍450mm-equivalent
  • smc Pentax-DA 55–‍300mm F4.5–‍6.3 ED PLM WR RE ~85–‍450mm-equivalent
  • smc Pentax-DA 60–‍250mm F4 ED [IF] SDM 🔗 ~90–‍380mm-equivalent
  • smc Pentax-DA 70mm F2.4 Limited ~105mm-equivalent
  • smc Pentax-DA 200mm F2.8 ED [IF] SDM ~300mm-equivalent
  • smc Pentax-DA 300mm F4 ED [IF] SDM ~450mm-equivalent
  • smc Pentax-DA 560mm F5.6 ED AW ~850mm-equivalent

D FA-series

D FA-series lenses are designed for digital full-frame sensors; besides sensor coverage (and, consequentially, size and weight) are identical to DA-series lenses.

  • HD Pentax-D FA 15–‍30mm F2.8 ED SDM WR
  • HD Pentax-D FA 24–‍70mm F2.8 ED SDM WR
  • HD Pentax-D FA 28–‍105mm F3.5–‍5.6 ED DC WR
  • HD Pentax-D FA 50mm F1.4 SDM AW
  • smc Pentax-D FA 50mm F2.8 Macro
  • HD Pentax-D FA 70–‍200mm F2.8 ED DC AW
  • HD Pentax-D FA 70–‍210mm F4 ED SDM WR
  • HD Pentax-D FA 85mm F1.4 SDM AW
  • smc Pentax-D FA 100mm F2.8 Macro WR
  • smc Pentax-D FA 100mm F2.8 Macro 🔗
  • HD Pentax-D FA 150–‍450mm F4.5–‍5.6 ED DC AW

Pentax Lens terminology

  • ★ – a lens that is built to the finest optical and mechanical standard
  • AL – a lens that uses at least one aspherical lens element
  • AW – a lens that has additional seals for the best resistance to dust, moisture and light rain
  • DC – a lens that uses direct current motor for in-lens focusing
  • ED – a lens that uses at least one extra-low dispersion lens element
  • [IF] – a lens that uses internal focusing mechanism, it does not change the size while focusing
  • Limited – a lens that is built to the finest mechanical standard, with distinctive appearance and detailed finish
  • PLM – a lens that uses pulse autofocus motor for in-lens focusing
  • PZ – a lens that supports Power Zoom functionality, like motorized zoom control
  • RE – a lens that is retractable, can be collapsed to smaller size
  • SDM – a lens that uses supersonic drive motor for in-lens focusing
  • WR – a lens that has additional seals for better resistance to dust, fog and light rain
  • XS – a lens that is built for extra small size