Pentax K-mount

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Pentax K-mount
Pentax K1000 lens off.jpg
Pentax K1000 without lens, showing the original K mount
Type bayonet
Tabs 3
Connectors electrical pins, drive shaft for focus.

The Pentax K-mount, sometimes referred to as the "PK-mount", is a 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 been used by all Pentax 35 mm and digital SLRs since; it is also used by the Pentax K-01, a mirrorless interchangeable-lens camera introduced in 2012. A number of other manufacturers have also produced many K-mount lenses and K-mount cameras.



The Pentax K-mount has undergone a number of evolutions over the years as new functionality has been added. In general, the term K-mount may refer to the original K-mount, or to all its variations.

Originally designed by Zeiss for an alliance with Pentax[citation needed], it was intended to be a common lens mount for a proposed series of cameras and lenses. However, the plan failed to work out and the two firms parted company amicably, but Pentax retained the lens mount and at least one Zeiss lens design for its own use.[citation needed]


The original K-mount is a simple bayonet connection with three tabs. It was introduced with the K series of cameras. The lens is locked into the camera with an approx. 70° clockwise turn (when looking at the front of the camera).

The only linkage with the camera is mechanical and involves the aperture. A slot between two of the bayonet tabs on the lens allows the stop-down coupler from the camera to sense the aperture setting on the lens and adjust the light meter display accordingly. Opposite this is the diaphragm release from the lens which extends into the camera body and holds open the spring-loaded diaphragm of the lens. When setting up a shot this keeps the diaphragm fully open. When the shutter is released, so is this lever. It allows the diaphragm to close to the desired setting while the film is being exposed, and opens it again after the shutter closes.

Both of these linkages are arranged so that they are aligned and spring-loaded by the act of inserting the lens and turning it until it locks.

Bodies equipped with the original K-mount include the K series, the M series except the ME F, and the LX. Lenses that support it include those labelled 'SMC Pentax', 'SMC Pentax-M' and 'SMC Pentax-A'. These K-mount bodies cannot use lenses that lack an aperture ring, such as FAJ or DA.

K-mount lenses can be used on all Pentax bodies, but are restricted to stopped down mode when used with "crippled" KAF-mount bodies (see below).


The KF-mount was Pentax's first attempt at an autofocus system. This autofocus system used sensors in the camera body and a motor in the lens. The two were connected via five new electrical contacts on the bayonet mount itself. One permitted the lens to turn on the camera's metering and focus sensors, two focused the lens (towards and away from infinity) and two appear to have been unused and may have been reserved for future functionality.

The KF-mount was largely a failure. Only one camera and one lens ever used this mount, the Pentax ME F and SMC Pentax-AF 35-70/2.8. The lens was somewhat large and cumbersome [3] since it had to enclose both the focusing motor (with gears) and batteries to power it. KF and the ME-F are similar in many ways to the system used by Canon in the ill fated Canon T80, introduced several years later.

The ME F can use all Pentax K-mount lenses except for FAJ lenses, which lack an aperture ring. The 35–70 mm lens can be used on all other Pentax K-mount bodies in manual focus mode, but it must be used stopped down on "crippled" KAF bodies.


Pentax A 50mm lens displaying the KA-mount

The KA-mount is derived from the original K-mount. It allows the lens's aperture to be set by the body, and thus permits shutter priority and program auto exposure modes. It was introduced in 1983, and is supported by A-series and P-series bodies; Pentax lenses that support it are marked 'SMC Pentax-A'. It is completely backward-compatible with the original K-mount.

The aperture on the lens is set from the body by the same stop-down lever found on the original K-mount, but on KA-lenses this lever is proportional to the area of the aperture opening, rather than the diameter as on previous lenses. This allows the body to easily set a specific aperture, since the relationship to F stops is linear. The lenses add an 'A' setting on the aperture dial, which gives the body control of the aperture. Other, numeric settings are used for manual aperture modes—aperture priority and full manual mode.

Six electrical contacts are added to the bayonet ring. One is slightly recessed and allows the lens to indicate whether the aperture ring is set at 'A' or not. If it is, a pin on the lens extends slightly and makes contact, while if the lens is at any other setting the pin is retracted and does not make contact. The other five contacts are used to encode the lens's aperture range. Each contact on the lens is either conducting or non-conducting, providing a binary 1 or 0, respectively. Two contacts encode the lens's minimum aperture—f/16, f/22, f/32 or f/45; although no Pentax K-mount lens has ever had an f/16 minimum aperture, OEM lenses often have. The other three contacts encode the lens's maximum aperture; their meaning is dependent on the minimum aperture indicated by the lens.


The KAF-mount was Pentax's second and much improved attempt at adding auto-focus to lenses. It adds a small drive shaft to the KA-mount, allowing the body to adjust the focus of the lens. This makes the lenses less bulky than the earlier KF-mount, which had both a motor and batteries inside the lens.

It also adds a seventh electrical contact, this one carrying digital information from the lens to the camera. It carries the following information: focal length, distance to the subject, exact absolute f-stop value, and lens size. This information is used to make better exposure decisions, along with the multi-segmented metering that was introduced in cameras using the KAF-mount.

The MZ-30/ZX-30, MZ-50/ZX-50, MZ-60/ZX-60, the *ist series and the K100D/K110D lack the mechanical stop-down coupler/indicator. In these cameras – in aperture priority mode – the aperture is set by a dial on the camera body, and no longer on the lens. Pre-A lenses can only be used in manual stop down metering mode and manual flash mode.


Pentax MZ-3 showing the KAF2-mount, with the mechanical stop-down coupler/indicator (at 2 o'clock), the auto-focus transmission coupling (at 4 o'clock), two additional power zoom electrical contacts (at 5'oclock) and the digital information pin (at 6'oclock)

The KAF2-mount is the same as the KAF-mount except that it adds two extra contacts to the inside of the mounting ring for power zooming, and transmits modulation transfer function (MTF) data through the digital seventh contact. On the K10D digital SLR model (and later models like K100D Super, K20D, Pentax K-7, Pentax K-5 and K200D) the two power contacts can also power Silent Drive 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.


The KA2 is identical to KAF, but lacks the autofocus drive shaft. Another way of looking at it is that it adds the seventh contact for digital information to the KA-mount.


The R-K-mount is a variation on the original K-mount by Ricoh. It supports Ricoh's own implementation of shutter priority and auto exposure modes, similar to the KA-mount but much simpler. The only addition to the original K-mount is a small pin at the bottom which tells the body when the aperture ring has been set to the "P" setting (similar to the "A" setting on Pentax KA lenses).

The R-K-mount is used on Rikenon P lenses, Ricoh bodies that include the letter 'P' in their model number, and some non-Ricoh lenses. It is compatible with all other K-mount cameras and lenses when in manual or aperture-priority exposure modes, however the extra pin needs to be removed for safe use on autofocus Pentax cameras. If this is not done, the lens may lock on the camera body and will need dismantling before it can be removed from the body of Pentax autofocus cameras. The 'P' setting is not compatible with the 'A' setting as the 'P' pin is in a different location than the 'A' contact on Pentax 'A' lenses and the flange on Pentax bodies.

Adaptors to use on K-mount[edit]

L39 / LTM[edit]

Adaptors can be found to allow use of lenses with Leica M39 thread (screw) mount. If a lens originally intended for Leica Rangefinder cameras is used, focusing is limited to about 10cms. However, some SLR lenses were made in LTM 39 mount, mostly by KMZ for use in the early Zenit SLRs which had LT 39 mounts. These "Zenit" TM 39 lenses will focus properly. Or these lenses can be used in conjunction with the M42 to LTM 39 adapter.


Adaptors can be found to allow use of a non-Leica 39mm mount into the K-mount, typically as a M39-M42 adapter ring that is mounted in a M42-PK adapter; they may focus to infinity.


Pentax supplies adapters to fit M42 screw-mount lenses, as do several third-party manufacturers. The M42 screw-mount system was used by Pentax prior to the introduction of the K-mount. Pentax designed the K-mount wide enough to allow an adapter to fit between the M42 thread and the K bayonet. They also kept the same flange focal distance (also called registration distance or register) as the M42 screw-mount, so that M42 lenses focus correctly using the correct adapter (such as Pentax original[2] or Bower). There are however other third-party adapters that add to the flange focal distance so that one loses the ability to focus to infinity. The loss of infinity-focus may not be significant in macro or close-up photography.

There is great debate in the Pentax community over the applicability and safety of adapters other than those supplied by Pentax. Many users of third-party infinity-focus adapters, such as Bowers, report difficulty in removing the adapters from camera bodies. Such adapters may require modification before they may be safely used. Official Pentax adapters, and flanged non-infinity-focus adapters, do not provoke such problems.

Many old M42 lenses have a modern-day cult reputation, including the (Pentax) Asahi Takumar range. Some manufacturers, including Carl Zeiss AG, still make lenses in the M42-mount. K-mount cameras have a suitable flange focal distance (45.46 mm) to adapt old M42 lenses without any optical correction or loss of infinity focus/changed close focus distance. Other SLRs with a short flange-focal distance can accept M42 lenses as well: Canon E-mount (44.00 mm), Sony and (Konica) Minolta A-mount (44.50 mm), Sigma (44 mm), Olympus 4/3rd (38.67 mm), and many more, but notably not Nikon F-mount (46.5 mm).

Mamiya 645[edit]

Nikon AI/AIS[edit]

Optically corrected adapter to use Nikon AIS AI lenses on K-mount.

Voigtlander Bessamatic Retina[edit]

Adapter for Voigtlander Bessamatic Retina lenses, Voigtlander Bessamatic, Voigtlander Ultramatic, Kodak Retina SLR, or Kodak iiis lenses.


There is also some Petri adapter to K-mount but those do not allow to focus to infinity due to the different flange-to-film-plane distance.

Medium Format[edit]

Pentax made adapters for its medium-format lenses to use on the K-mount, both the 645 and 6×7, and for the Hasselblad Bayonet type. Also there is a Pentacon-Six (Kiev88 CM) adapter still in production and a shift adapter to use Pentacon lenses as shift lens.

  • Pentax 645
  • Pentax 6×7
  • Hasselblad Bayonet type
  • Pentacon Six
  • Mamiya 645

S-mount and T-mount[edit]

Mounts used for Telescopes, microscopes and generic optics. The T-mount was initially developed by Tamron (1957) to allow the easy adaption of generic 35mm SLR optics into multiple mounts. The T-mount is a 42mm diameter 0.75mm pitch screw mount with a 55mm flange focal distance. Later versions (T2, T4, TX) were more advanced and complex. Several other manufacturers besides Tamron have used these mounts. Because the T-mount is still used for many telescopes and microscopes, they are still available new. Note: do not confuse the T-mount (M42x0.75) and the M42-mount (M42x1.0) lenses or adapters. They are both screw-mounts of the same diameter, and will mount if they are forced, but the difference in pitch can cause damage to the lens, adapter or camera mount if they are confused!



These are adaptors designed by Tamron to allow the transfer of apperture setting from lens to camera or vice verse, including the Adapt-A-matic (1969), Adaptall (1973) and Adaptall-2 (1979). When Pentax introduced the KA-mount in 1983 Tamron upgraded their Adaptall-2 K-mount into an Adaptall-2 KA-mount. For more details see the Tamron article or the Adaptall-2 web site.[3]

Adaptors for other cameras to use K-mount[edit]


List of lenses with any K-mount variant[edit]


  • Access 28mm f2.8 P-MC Macro (49mm filter)
  • Access 75-300mm f5.6 PMC Zoom (55mm filter)


Angenieux a lens manufacturer in France, mainly known for its movie equipment than for photographic lenses, but it has built optics for Leica, Nikon, Canon and a few K-mount lenses.


The Agfa K mount cameras were rebadged Chinons.

  • Agfa Color 50mm f1.4 (49mm filter)


Arsat is a trade mark of Ukrainian lens manufacturer Arsenal, Kiev.

  • PCS Arsat 35mm f2.8 Shift Lens


Beroflex seems to have been a German commercial firm of photographic lenses; not too much information is available yet but it appears that it designed lenses made overseas by Japanese companies like Soligor.

  • Beroflex 85-210mm f3.8
  • Beroflex 500mm f8/f22 lens, 5 degree view ; 72mm diameter x 42mm. Adapter fitted for use on M42 screw thread. In 1975,came complete with lens caps and case.

Carl Zeiss Jena[edit]

Carl Zeiss of East Germany marketed a number of lenses for the K-mount through its sales network. These lenses were in fact made by Sigma in Japan. The "real" 35mm East German made Carl Zeiss Jena Lenses where available at the same time but only in Praktica B-mount.

Carl Zeiss[edit]

Carl Zeiss is one of the most prestigious names on the photographic world; it re-launched its line of lenses for the K-mount in 2008, mainly due to the growing popularity of both Pentax and Samsung digital SLRs. Carl Zeiss announced in September 2010 that the ZK lenses would be discontinued that year. [4]


  • Chinon 24mm f2.5
  • Chinon 28mm f2.8
  • Chinon 35mm f2.8 AUTO CHINON MULTI-COATED (49mm filter)
  • Chinon 35-70mm f3.3-4.5 MC Auto Focus (52mm filter)
  • Chinon 35-70mm f3.5-4.5 MC Macro (55mm filter)
  • Chinon 35-80mm f3.5-4.9 MC Macro
  • Chinon 45mm f2.8 Auto Multicoated
  • Chinon 50mm f1.4 Auto Multicoated
  • Chinon 50mm f1.7 Auto Multicoated
  • Chinon 50mm f1.7 Auto Multicoated Auto Focus (58mm filter)
  • Chinon 50mm f1.9 Auto (52mm filter)
  • Chinon 135mm f2.8 Auto Multicoated
  • Chinon 200mm f3.3 Auto Multicoated
  • Chinon Makinon 500mm f8 Catadioptric

Cima Kogaku[edit]

Cima Kogaku had a patented[5] system that allowed them to build common lens bodies, and add the appropriate lens mount at the factory. The Pentax version was only K-mount, not KA-mount. They mostly sold their lenses on an OEM basis, with them sold under a variety of different brands. In the UK, they were sold by Photax as Super-Paragon PMC lenses. Tokyo Kogaku sold them as AM Topcor lenses for their Topcon RM300 camera. Cima Kogaku also sold them directly under the Cimko brand. (Some of the lenses below may not have ever been sold under the Cimko brand.)

  • Cimko MT 24mm f2.8
  • Cimko MT 28mm f2.8
  • Cimko MT 35mm f2.8
  • AM Topcor 55mm f1.7
  • Cimko MT 135mm f2.8
  • Cimko MT 200mm f3.3
  • Cimko MT 28-50mm f3.5-4.5 (two touch)
  • Cimko MT 28-50mm f3.5-4.5 (one touch)
  • Cimko MT 35-100mm f3.5-4.3
  • Cimko MT 55-230mm f3.5-4.5
  • Cimko MT 70-200mm f3.8-4.8
  • Cimko MT 80-200mm f3.8
  • Cimko MT 80-200mm f4.5



Cosmicar is a division of Pentax, it commercialized video lenses, but some were released for the K-mount.

  • MC Cosmicar 28mm f2.8 (28mm filter)
  • MC Cosmicar 28-80mm f3.5-4.5 (Macro at 80mm end; KA mount)
  • Cosmicar 70-200mm f4


CPC Lenses are also known as Phase 2 or Phase 2 CCT.

  • CPC 28mm f2.8 Auto A (52mm filter)
  • CPC 28-80 f2.8-4.0 (62mm filter)
  • CPC 28-80mm f3.5-4.5
  • CPC 28-85mm f3.5-4.5
  • CPC 135mm f2.8 MC Auto A (55mm filter)


  • Focal 28mm f2.8 MC Auto (52mm filter)
  • Focal 28mm f2.8 MC Auto (55mm filter)
  • Focal 135mm f2.8 MC Auto (58mm filter)


  • Gemini 28mm f2.8 (49mm filter)


Hanimex was an Australian distributor founded by Jack Hannes after the Second World War.[6] The name is a contraction of HANnes IMport and EXport and the company imported both European and Japanese lenses, bodies and accessories. Hannes apparently sought low cost providers and Hanimex lenses have a poor reputation among users.

  • Hanimex AUTO ZOOM f3.5-4.5
  • Hanimex AUTOMATIC-MC-MACRO 135 f2.8

Hervic Zivnon[edit]

  • Hervic Zivnon 23mm f3.5(62mm filter)


Made for the Zenit cameras by KMZ

  • MC Helios 44K-4 58mm f2 (52mm filter)
  • MC Helios 77K-4 50mm f1.8


Hoya, a leading manufacturer of optical glass, purchased Pentax in 2008.

  • Hoya 28mm f2.8 HMC (52mm filter)
  • Hoya 28-50mm f3.5-4.5 HMC (55mm filter)
  • Hoya 28-85mm f4 HMC (72mm filter)
  • Hoya 70-150mm f3.8 HMC (55mm filter)
  • Hoya 100-300mm f5 macro HMC (62mm filter)
  • Hoya 135mm f2.8 macro HMC (52mm filter)

JC Penney[edit]

  • JC Penney 135mm f2.8


Kalimar was an American distributor of camera equipment from 1952 to 1999 when it was acquired by Tiffen, information on lenses and manufacturers is difficult to obtain as it sell rebadged cameras and lenses from the former Soviet Union and Japan and sell it under its own name in the U.S..[7]

  • Kalimar 28mm f2.8 Macro (52mm filter)
  • Kalimar 28-105mm f3.5-4.5 Macro
  • Kalimar 35-70mm f2.8
  • Kalimar 60-300mm f4-5.6 MC AF (67mm filter)
  • Kalimar 500mm f8 (72mm filter)(catadioptric)


Kiron was a third party lens manufacturer,[8] it manufactured lenses for other mounts as well on the decade of 1980-1990


LOMO is a Russian photographic manufacturer, it made some lenses for the Almaz camera on K-mount, but caution must be used as the Almaz version has some differences with the standard K-mount

  • Volna-10K 35mm f1.8
  • Volna 50mm f1.8, kit lens for Almaz-103 kamera.

Lester A. Dine[edit]

  • Lester A. Dine Kiron 105mm f2.8 macro (52mm filter)


  • Lensbaby 1.0 Selective Focus Lens (2006–2008) (
  • Lensbaby 2.0 Selective Focus Lens (2008)
  • Lensbaby Muse Double Glass Optic
  • Lensbaby Muse Plastic Optic
  • Lensbaby Composer
  • Lensbaby Scout with Fisheye Optic
  • Lensbaby Control Freak


  • Loreo 35 mm f11-22 Shift lens (Lens-In-A-Cap)
  • Loreo 38 mm f11 3D (Stereo) (2006–Present)


Luxon is a Chinese manufacturer, and there is little information available on the company or its products.

  • Luxon 50mm f2.0 MC (China)


  • Mir-20K 20mm f3.5 (rear filter)
  • Mir-47K 20mm f2.5 (rear filter), made by VOMZ


Miranda was a brand name used by the Dixons group in the UK, mostly for Cosina made products.

  • Miranda 28mm f2.8 (49mm filter)
  • Miranda 28mm f2.8 MC (52mm filter)
  • Miranda 50mm f2 (49mm filter)
  • Miranda 70-210mm f4 Macro (52mm filter)
  • Miranda 70-210mm f4.5 Macro
  • Miranda 75-200mm f4.5-5.3 Macro (52mm filter)


  • Mitakon 80-200mm f4.5 MC Zoom (55mm filter)
  • Mitakon 28-200mm f3.8-5.5


Makinon lenses were made by Makina Optical in Japan.

  • Makinon MC Reflex 400m f6.7 Macro
  • Makinon MC Reflex 500mm f8 Macro (Catadioptric) (67mm filter)
  • Makinon MC ZOOM 35-70mm 1:2.8 (62mm filter)


  • Oberon-11K 200mm f2.8


  • Ozunon 35mm-75mm F3.5-4.5


Petri was a Japanese camera manufacturer, which tried to capitalize on the popularity of the K-mount lens base and made one camera that used the K-mount with one standard lens:


Peleng is a lens manufacturer based in Belarus, it was founded in the Soviet era and released most of its lenses for the M42 mount, but it has a K-mount lens:

  • Peleng 8mm f2.3 (2008)


Main article: Pentax lenses

Good sources of information on Pentax K-mount lenses: Bojidar Dimitrov's Pentax K-mount pages,[9] Stans Pentax Photography site,[10] Pentax Forum's lens reviews.[11] Bold text indicates lenses in current production/stock sale from Pentax.[12]

  • SMC Pentax FISH-EYE 8.4mm f2.8 (fisheye)
  • SMC Pentax-DA 10-17mm f3.5-4.5 ED IF fisheye
  • SMC PENTAX-DA 12-24mm f4 ED AL IF (2007-)
  • SMC Pentax-DA 14mm f2.8 SMC ED IF (2007-)
  • SMC Pentax 15mm f3.5
  • SMC Pentax 15mm f3.5 AL (AL version[13])
  • SMC Pentax-A 15mm f3.5
  • SMC Pentax-DA 15mm f4 limited ED AL
  • SMC Pentax-A 16mm f2.8 FE (fisheye)
  • SMC PENTAX-DA 16-45mm f4 ED AL (2003-)
  • SMC PENTAX-DA* 16-50mm f2.8 ED AL IF SDM (2007-)
  • SMC Pentax 17mm f4 FE (fisheye)
  • SMC Pentax-F 17-28mm f3.5-4-5 FE (fisheye)
  • SMC Pentax-DA 17-70mm f4 AL IF SDM (2008-)
  • SMC Pentax 18mm f3.5
  • SMC Pentax-FA J 18-35 f4-5.6 AL GC
  • SMC Pentax-DA 18-55mm f3.5-5.6 AL
  • SMC Pentax-DA 18-55mm f3.5-5.6 AL II
  • SMC Pentax-DA L 18-55mm f3.5-5.6 AL
  • SMC Pentax-DA 18-55mm f3.5-5.6 AL WR
  • SMC Pentax 18-135mm f3.5-5.6 ED AL IF DC WR
  • SMC Pentax-DA 18-250mm f3.5-6.3 ED AL IF
  • SMC Pentax-A 20mm f2.8
  • SMC Pentax-FA 20mm f2.8
  • SMC Pentax 20mm f4
  • SMC Pentax-M 20mm f4
  • SMC Pentax-FA 20-35mm f4 AL GC
  • SMC Pentax-DA 21mm f3.2 limited AL
  • SMC Pentax-FA* 24mm f2 AL IF
  • SMC Pentax 24mm f2.8
  • SMC Pentax-A 24mm f2.8
  • SMC Pentax 24mm f3.5
  • SMC Pentax-M 24-35mm f3.5
  • SMC Pentax-M 24-50mm f4
  • SMC Pentax-A 24-50mm f4
  • SMC Pentax-F 24-50mm f4
  • SMC Pentax-FA 24-90mm f3.5-4.5 AL IF GC (2001–2004)
  • SMC Pentax 28mm f2
  • SMC Pentax-M 28mm f2
  • SMC Pentax-A 28mm f2
  • SMC Pentax-M 28mm f2.8 (version 1)
  • SMC Pentax-M 28mm f2.8 (version 2)
  • SMC Pentax-A 28mm f2.8
  • SMC Pentax-F 28mm f2.8
  • SMC Pentax-FA 28mm f2.8
  • SMC Pentax-FA 28mm f2.8 soft
  • SMC Pentax 28mm f3.5
  • SMC Pentax-M 28mm f3.5
  • SMC Pentax 28mm f3.5 shift lens
  • SMC Pentax 28-50mm f3.5-4.5
  • SMC Pentax-M 28-50mm f3.5-4.5
  • SMC Pentax-FA* 28-70mm f2.8 AL PZ
  • SMC Pentax-FA 28-70mm f4 AL
  • SMC Pentax-A 28-80mm f3.5-4.5
  • SMC Pentax-F 28-80mm f3.5-4.5
  • 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 GC
  • SMC Pentax-FA 28-105mm f4-5.6 AF PZ
  • SMC Pentax-FA 28-105mm f4-5.6 AF IF
  • SMC Pentax-A 28-135mm f4
  • SMC Pentax-FA 28-200mm f3.8-5.6 AL IF
  • SMC Pentax 30mm f2.8
  • SMC Pentax-FA 31mm f1.8 limited AL ED GC (black) (2007-)
  • SMC Pentax-FA 31mm f1.8 limited AL ED GC (chrome) (2007-)
  • SMC Pentax 35mm f2
  • SMC Pentax-M 35mm f2
  • SMC Pentax-A 35mm f2
  • SMC Pentax-FA 35mm f2 AL GC
  • SMC Pentax 35mm f2.4 SMC DA AL
  • SMC Pentax-M 35mm f2.8
  • SMC Pentax-A 35mm f2.8
  • SMC Pentax-DA 35mm f2.8 limited macro
  • SMC Pentax 35mm f3.5
  • SMC Pentax-AF 35-70mm f2.8 (early autofocus lens for Pentax ME-F)
  • SMC Pentax-M 35-70mm f2.8-3.5
  • SMC Pentax-A 35-70mm f3.5-4.5
  • SMC Pentax-F 35-70mm f3.5-4.5
  • SMC Pentax-A 35-70mm f4
  • SMC Pentax-A 35-80mm f4-5.6
  • SMC Pentax-F 35-80mm f4-5.6
  • SMC Pentax-FA 35-80mm f4-5.6
  • SMC Pentax-A 35-105mm f3.5
  • SMC Pentax-F 35-105mm f4-5.6
  • SMC Pentax-A 35-135mm f3.5-4.5
  • SMC Pentax-F 35-135mm f3.5-4.5
  • SMC Pentax-A 35-210mm f3.5-4.5
  • SMC Pentax-M 40mm f2.8 "pancake"
  • SMC Pentax-DA 40mm f2.8 limited "pancake"
  • SMC Pentax-DA 40mm f2.8 XS "pancake"
  • SMC Pentax-M 40-80mm f2.8-4
  • SMC Pentax-FA 43mm f1.9 limited GC (black)
  • SMC Pentax-FA 43mm f1.9 limited GC (chrome)
  • SMC Pentax 45-125mm f4 (version 1)
  • SMC Pentax 45-125mm f4 (version 2)
  • SMC Pentax 50mm f1.2
  • SMC Pentax 50mm f1.2 gold
  • SMC Pentax-A 50mm f1.2
  • SMC Pentax-A 50mm f1.2 special
  • SMC Pentax 50mm f1.4
  • SMC Pentax-M 50mm f1.4
  • SMC Pentax-A 50mm f1.4
  • SMC Pentax-F 50mm f1.4
  • SMC Pentax-FA 50mm f1.4
  • SMC Pentax-M 50mm f1.7
  • SMC Pentax-A 50mm f1.7
  • SMC Pentax-F 50mm f1.7
  • SMC Pentax-FA 50mm f1.7
  • SMC Pentax-M 50mm f2
  • SMC Pentax-A 50mm f2
  • SMC Pentax-A 50mm f2.8 macro 1:2
  • SMC Pentax-F 50mm f2.8 macro 1:1
  • SMC Pentax-FA 50mm f2.8 macro 1:1
  • SMC Pentax-D FA 50mm f2.8 macro 1:1
  • SMC Pentax 50mm f4 macro 1:2
  • SMC Pentax-M 50mm f4 macro 1:2
  • SMC Pentax-DA* 50-135mm f2.8 SMC ED IF SDM (2007-)
  • SMC PENTAX-DA 50-200mm f4-5.6 ED
  • SMC PENTAX-DA 50-200mm f4-5.6 ED WR
  • SMC Pentax-DA 55mm f1.4 SDM
  • SMC Pentax 55mm f1.8
  • SMC Pentax 55mm f2
  • SMC Pentax-DA 55-300mm F4-5.8 ED
  • SMC Pentax-DA* 60-250mm f4 ED IF SDM
  • SMC Pentax-DA 70mm f2.4 limited (2007-)
  • SMC Pentax-FA 70-200 f4-5.6 PZ
  • SMC Pentax-A 70-210mm f4
  • SMC Pentax-F 70-210mm f4-5.6 ED
  • SMC Pentax-M 75-150 f4
  • SMC Pentax-FA J 75-300mm f4.5-5.6 AL
  • SMC Pentax-FA 77mm f1.8 limited FREE GC (black)
  • SMC Pentax-FA 77mm f1.8 limited FREE GC (chrome)
  • SMC Pentax-FA 80-200mm f2.8 ED IF PZ
  • SMC Pentax 80-200mm f4.5
  • SMC Pentax-M 80-200mm f4.5 (version 1)
  • SMC Pentax-M 80-200mm f4.5 (version 2)
  • SMC Pentax-A 80-200mm f4.7-5.6
  • SMC Pentax-F 80-200mm f4.7-5.6
  • SMC Pentax-FA 80-200mm f4.7-5.6
  • SMC Pentax-FA 80-320mm f4.5-5.6
  • SMC Pentax-A* 85mm f1.4 FREE (1984–1989)
  • SMC Pentax-FA* 85mm f1.4 IF (1992–2004)
  • SMC Pentax 85 f1.8
  • SMC Pentax-M 85 f2 (1977–1984)
  • SMC Pentax 85mm f2.2 soft
  • SMC Pentax-F 85mm f2.8 soft
  • SMC Pentax-FA 85mm f2.8 soft
  • SMC Pentax 85-210mm f3.5
  • SMC Pentax 85-210mm f4.5
  • SMC Pentax-M 100mm f2.8
  • SMC Pentax-A 100mm f2.8
  • SMC Pentax-A 100mm f2.8 macro 1:1 FREE
  • SMC Pentax-F 100mm f2.8 macro 1:1 FREE
  • SMC Pentax-FA 100mm f2.8 macro 1:1 FREE
  • SMC Pentax-DFA 100mm f2.8 macro 1:1 FREE
  • SMC Pentax-FA 100mm f3.5 macro 1:2
  • SMC Pentax 100mm f4 macro 1:2
  • SMC Pentax 100mm f4 macro 1:2 bellows
  • SMC Pentax-M 100mm f4 macro 1:2
  • SMC Pentax-M 100mm f4 dental macro 1:2
  • SMC Pentax-A 100mm f4 macro 1:2
  • SMC Pentax-A 100mm f4 dental macro 1:2
  • SMC Pentax-F 100-300mm f4.5-5.6
  • SMC Pentax-F 100-300mm f4.5-5.6 PZ
  • SMC Pentax-FA 100-300mm f4.7-5.8
  • SMC Pentax 105mm f2.8
  • SMC Pentax 120mm f2.8
  • SMC Pentax-M 120mm f2.8
  • SMC Pentax-A* 135mm f1.8 FREE (1984–1989)
  • SMC Pentax 135mm f2.5
  • SMC Pentax-A 135mm f2.8 (1985–1989)
  • SMC Pentax-F 135mm f2.8 IF
  • SMC Pentax-FA 135mm f2.8 IF
  • SMC Pentax 135mm f3.5
  • SMC Pentax-M 135mm f3.5
  • SMC Pentax 135-600mm f6.7
  • SMC Pentax-M 150mm f3.5
  • SMC Pentax 150mm f4
  • SMC Pentax 200mm f2.5
  • SMC Pentax-A* 200mm f2.8 ED (1984–1998)
  • SMC Pentax-FA* 200mm f2.8 IF ED (1993–2004)
  • SMC Pentax-DA* 200mm f2.8 ED IF SDM (2007-)
  • SMC Pentax 200mm f4
  • SMC Pentax-M 200mm f4
  • SMC Pentax-A 200mm f4
  • SMC Pentax-A* 200mm f4 ED FREE macro 1:1
  • SMC Pentax-FA* 200mm f4 ED IF GC macro 1:1
  • SMC Pentax-F* 250-600 f5.6 ED IF
  • SMC Pentax-FA* 250-600 f5.6 ED IF PZ
  • SMC Pentax-A* 300mm f2.8 ED IF
  • SMC Pentax-FA* 300mm f2.8 ED IF
  • SMC Pentax 300mm f4
  • SMC Pentax-M* 300mm f4
  • SMC Pentax-A* 300mm f4
  • SMC Pentax-DA* 300mm f4 ED IF SDM
  • SMC Pentax-F* 300mm f4.5 ED IF
  • SMC Pentax-FA* 300mm f4.5 ED IF
  • SMC Pentax-A* 400mm f2.8 ED IF
  • SMC Pentax 400mm f5.6
  • SMC Pentax-M 400mm f5.6
  • SMC Pentax-A 400mm f5.6
  • SMC Pentax-FA* 400mm f5.6 ED IF
  • SMC Pentax 400-600mm f8-12 Reflex (Catadioptric)
  • SMC Pentax 500mm f4.5
  • SMC Pentax-F* 600mm f4 ED IF
  • SMC Pentax-FA* 600mm f4 ED IF (currently only on special order)
  • SMC Pentax-A* 600mm f5.6 ED IF
  • SMC Pentax 1000mm f8
  • SMC Pentax 1000mm f11 Reflex (Catadioptric)
  • SMC Pentax-A* 1200mm f8 ED IF
  • SMC Pentax 2000mm f13.5 Reflex (Catadioptric)
  • SMC Pentax-M 2000mm f13.5 Reflex (Catadioptric)

Special optics[edit]

  • Pentax Stereo Adapter I
  • Pentax Stereo Adapter II




Polar is a brand of Samyang Optics, a South Korean third party lens manufacturer.

  • Polar 800mm f8 Reflex(Catadioptric) (2008)
  • Polar 85mm Portrait Lens f1.4 Aspherical IF (2008)


  • Porst 28mm f2.8 MC Auto
  • Porst 40mm f2.5 MC Auto
  • Porst 55mm f1.2 Reflex MC Auto (55mm filter)
  • Porst 55mm f1.2 MC Auto
  • Porst 135mm f2.8 Tele-AS MC E (55mm filter)[14]
  • Porst 75-260mm f4.5
  • Porst 200mm f3.5


  • Promaster 18-200mm f3.5-6.3 AF XR EDO
  • Promaster 18-200mm f3.5-6.3 AF XR EDO(2007)
  • Promaster 19-35mm f3.5-4.5 AF
  • Promaster 24-200mm f3.5-5.6 AF XLD ASP
  • Promaster 28-80mm f3.5-5.6 AF
  • Promaster 28-70mm f2.8-4.2 MC Auto ZOOM MACRO
  • Promaster 28-70mm f3.9-4.8 Spectrum 7 MC Macro Auto
  • Promaster 28-80mm f3.5-5.6 Spectrum 7 AF
  • Promaster 28-105mm f4-5.6 AF IF
  • Promaster 28-200mm f3.5-5.6 AF XR
  • Promaster 28-210mm f3.5-5.6 Spectrum 7 MC Macro
  • Promaster 50 f1.7
  • Promaster 60-300mm f4-5.6 Spectrum 7 (67mm filter) (2008)
  • Promaster 70-210mm f4-5.6 AF Macro
  • Promaster 70-300mm f4-5.6 Spectrum 7 AF EDO LD Macro (2007)
  • Promaster 80-210mm f4.5-5.6 AF
  • Promaster 85-210mm f3.8 Auto Zoom Macro MC
  • Promaster 135mm f1:2.8 MC


  • Revue 35mm f2.8
  • Revue 80-200mm f4.5
  • Revue 28-70mm f3.5-4.5
  • Revue 28-50mm f3.5-4.5


  • Revu 50mm f1.2 (1975)


  • Revuenon Auto multicouted 28 mm f/2.8
  • Revuenon Auto MC 28 mm f/2.8
  • Revuenon Auto MC 50 mm f/1.4
  • Revuenon 55 mm f/1.2
  • Revuenon 135 mm f/2.8
  • Revuenon 200 mm f/3.3
  • Revuenon 200 mm f/3.5
  • Revuenon 300 mm f/5.6
  • Revuenon 500 mm f/8.0 Mirror

Ricoh - Rikenon - Riconar[edit]

This lens uses the Ricoh KR-mount version, Ricoh made both a XR version without the zoom pin, and the P version which has it.

  • Rikenon 28mm f2.8 (52mm filter)XR Version
  • Rikenon 35mm f2.8 XR Version
  • Rikenon 50mm f2 L (52mm filter)XR Version
  • Rikenon 50mm f1.4 (52mm filter)XR Version
  • Rikenon 50mm f1.7 (52mm filter)XR Version
  • Riconar 55mm f2.2 (52mm filter)
  • Rikenon 135mm f2.8 (55mm filter)XR Version
  • Rikenon 200mm f4 XR
  • Rikenon 50mm f2 (52mm filter)P Version
  • Rikenon 600mm f8 Reflex XR Version


This lens uses the Ricoh KR-mount version:


Sakar is a commercial American company that used to sell K-mount lenses.[15]

  • 80-210mm f1:3.8 macro MC (58mm filter)
  • 500mm f/8 macro mirror (Catadioptric)


  • Samyang 14mm f/2.8 IF ED UMC
  • Samyang 8mm f/3.5 Aspherical IF MC Fish-eye
  • Samyang/Rokinon 85mm f/1.4 IF MC Aspherical
  • Samyang 100-500mm f5.6-7.1 Macro Tele Zoom Lens


  • Samsung 35-135mm f3.5-4.5
  • Samsung 50-200mm f4-5.6 D-Xenon


All these lenses had been marketed by Samsung and are those present on Samsung's digital SLRs[16] Schneider-Kreuznach is a traditional optics maker that do still make specialised glass and lenses (today mainly high-quality large-format lenses, enlarger lens and photographic loupes), but not for Samsung. They license their name to Samsung granted that certain minimum quality requirements are fulfilled. All the Schneider branded glass from Samsung is manufactured by Pentax and corresponds directly to Pentax lenses.[17][18]

  • Schneider-Kreuznach D-Xenogon 35mm f2 (2006-) (rebadged SMC PENTAX-FA 1:2 35mm AL, 1999-)
  • Schneider-Kreuznach D-Xenon 18-55mm f3.5-5.6 AF (2007- ) (rebadged SMC PENTAX-DA 1:3.5-5.6 18-55mm AL, 2004- )
  • Schneider-Kreuznach D-Xenon 100mm MACRO 1:2.8 (2007-) (rebadged SMC PENTAX-D FA 1:2.8 100mm MACRO, 2004-)
  • Schneider-Kreuznach D-Xenogon 10-17mm F3.5-4.5 ED (2007- ) (rebadged SMC PENTAX-DA FISH-EYE 1:3.5-4.5 10-17mm ED (IF), 2006-)
  • Schneider-Kreuznach D-Xenon 12-24mm f4 ED (2007- ) (rebadged SMC PENTAX-DA 1:4 12-24mm ED AL (IF), 2005-)
  • Schneider-Kreuznach D-Xenon 50-200mm f/4-5.6 AF (2006-) (rebadged SMC PENTAX-DA 1:4-5.6 50-200mm ED, 2005-)

Special lenses[edit]

  • Schneider-Kreuznach Super Angulon 28mm f2.8 Shift Lens (2008)

(The mechanism uses an adapter for different mounts as part of the design, but without adapter cannot be used, similar to the Adaptall)


Sears is an American commercial company that sells relabeled lenses and cameras at their own stores in the U.S. for a number of years. As the objective was mainly commercial, quality is very different among lenses. Quality on construction in some ones is very good and in some others is plain bad. But it seems to be consistent among the same model. Some of the Sears lenses were made to fit Sears Cameras with the Ricoh K-mount version and are identified as KR, but is prudent to verify it before using it on more modern cameras that may be damaged by the Ricoh pin.

  • Sears 28mm f/2.8 Auto MC
  • Sears 50mm f/1.4 Auto MC
  • Sears 50mm f/1.7 Auto MC
  • Sears 55mm f/1.4
  • Sears 55mm f/2
  • Sears 28-70mm f/3.5-4.5 Macro
  • Sears 60-300mm f/4-5.6 Macro (KR-mount)
  • Sears 75-260mm f/4.5 MC Macro
  • Sears 80-200mm f/4-5.6 Auto MC
  • Sears MC 135mm f/2.8
  • Sears Auto 2X Teleconverter


Sigma is a Japanese manufacturer of cameras and lenses. It has made lenses for the K-mount for a number of years. And quality among them had varied a lot. After the launch of the K10D digital SLR it launched K-mount D series lenses. Such ones are designed to be used with the APS size camera, but older K-mount can be used as well. An increase in model numbers can be seen between 2007 and 2008 due to the success of the K10D, K100D, K100D Super, K110D, K20D and K200D cameras. Use of older Sigma lenses is possible but with caution, some Sigma older K-mount lenses are with the infamous Ricoh pin.

Sigma 17-70mm lens
  • Sigma 8mm f/3.5 EX DG Fisheye
  • Sigma 8-16mm f/4.5-5.6 DC HSM
  • Sigma 10-20mm f/4.0-5.6 AF EX DC
  • Sigma 10-20mm F/3.5 EX DC HSM
  • Sigma 12-24mm f/4.5-5.6 EX DG
  • Sigma 14mm f/2.8 EX DG
  • Sigma 15mm f/2.8 EX DG Fisheye
  • Sigma 15-30mm f/3.5-5.6 AF EX DG
  • Sigma 17-35mm f/2.8-4 EX ASP
  • Sigma 17-50mm f/2.8 EX DC OS HSM
  • Sigma 17-70mm f/2.8-4.5 DC Macro
  • Sigma 17-70mm f/2.8-4.5 DC Macro (2007)
  • Sigma 17-70mm f/2.8-4 DC Macro OS HSM
  • Sigma 18-50mm f/3.5-5.6 DC AF
  • Sigma 18-50mm f2.8-4.5 DC OS HSM
  • Sigma 18-125 f/3.8-5.6 DC HSM
  • Sigma 18-200mm f/3.5-5.6 DC
  • Sigma 18-250mm f/3.5-6.3 DC OS HSM
  • Sigma 20mm f/1.8 EX DG ASP
  • Sigma 20-40mm f/2.8 EX DG ASP
  • Sigma 24mm f/1.8 EX DG
  • Sigma 24-70mm f/2.8 IF EX DG HSM
  • Sigma 24-70mm f/3.5-5.6
  • Sigma 24-135mm f/2.8-4.5 IF ASPH AF
  • Sigma 28mm f/1.8 EX DG
  • Sigma 28mm Mini-Wide f/2.8
  • Sigma 28-70mm f/2.8 EX DF ASP
  • Sigma 28-300mm f/3.5-6.3 DL ASP IF
  • Sigma 28 f/1.8 EX DG
  • Sigma 28-300mm f/3.5-6.3 CHZ ASP
  • Sigma 28-200mm f/3.5-5.6 DL Macro
  • Sigma 28-200mm f/3.5-5.6
  • Sigma 28-105mm f/2.8-4 ASP
  • Sigma 28-80mm f/2.8 EX DF ASP Macro II
  • Sigma 28-80mm f/2.8 EX DF ASP Macro
  • Sigma 28-80mm f/3.5-5.6
  • Sigma 30mm f/1.4 EX DC
  • Sigma 35-70mm f/2.8-4 Macro 1:6.7(52mm filter)
  • Sigma 50mm f1.4 EX DG HSM
  • Sigma 50mm f/2.8 EX DG Macro
  • Sigma 50-150 APO f/2.8 EX DC II
  • Sigma 50-200mm f4-5.6 DC O S HSM
  • Sigma 50-500mm f/4-6.3 EX APO HSM
  • Sigma 70mm f/2.8 EX DG Macro
  • Sigma 70-200mm f/2.8 EX DG Macro
  • Sigma 70-200mm f/2.8 EX APO
  • Sigma 70-200mm f/2.8 EX DG OS HSM
  • Sigma 70-200mm f/2.8 EX DG APO Macro MkII
  • Sigma 70-300mm f/4-5.6 DG APO Macro
  • Sigma 70-300mm f/4-5.6 DG Macro
  • Sigma 70-300mm f/4-5.6 DG OS
  • Sigma 70-300mm f/4-5.6 DI LD Macro (2008)
  • Sigma 70-300mm f/4-5.6 DL Macro
  • Sigma 70-300mm f/4-5.6 DG Macro
  • Sigma 70-300mm f/4-5.6 EX APO Macro
  • Sigma 75-300mm f4-5.6 AF
  • Sigma 85mm f/1.4 EX DG HSM
  • Sigma 100-200mm f/4.5 Macro
  • Sigma 100-300mm f/4.5-6.7 DL
  • Sigma 100-300mm f/4 EX APO IF
  • Sigma 100-300mm f/4.5-6.7 DL
  • Sigma 105mm f/2.8 EX DG Macro
  • Sigma 120-400mm f/4.5-5.6 APO DG OS HSM
  • Sigma 135-400mm f/4.5-5.6 APO ASP
  • Sigma 150-500mm f/5.0-6.3 DG OS HSM
  • Sigma 170-500mm f/5-6.3 APO ASP
  • Sigma 180mm f/3.5 EX Macro
  • Sigma 300mm f/2.8 EX DG
  • Sigma 500mm f/4 XQ Reflex (Catadioptric)
  • Sigma 500mm f/4.5 EX DG
  • Sigma 500mm f/8 Reflex (Catadioptric)
  • Sigma 600mm f/8 Reflex (Catadioptric)



Spiratone was a company devoted to sell photographic accessories and manage to sell some lenses under their own brand name until it closed, very few were made for the K-mount, and none of them are known to be of good quality.


  • Sun 28-80mm f3.5-4.5 Macro (62mm filter)
  • Sun 80-200mm f4.5 Macro (55mm filter)
  • Sun 85-210mm f4.8 telephoto zoom (55mm filter)
  • Sun 70-140mm f3.8 auto zoom (49mm filter)


  • Sunagor 75-300mm F5.6


  • Suntop 28-135mm f3.8-5.2 MC (67mm filter)


  • Takumar 135mm f2.5 prime
  • Takumar A 28-80mm f3.5-4.5 Macro


A Tamron 28-75mm f/2.8 in Pentax K-mount

Tamron is a third party vendor of photographic lenses, quality among them varies a lot. It is important to distinguish the adaptall versions from everything else, the adaptall is a generic adapter that allowed Tamron to manufacture a single lens design for a wide range of cameras, and commercialize those for specific brands with the use of the Adaptall I and Adaptall II adapters. So there are Tamron Lenses on K-mount, and Tamron Adaptall I and II for K- and KA-mount adapters. More Information on the Adaptall can be found on the Tamron article of Wikipedia. Here the non-Adaptall versions:

  • Tamron 10-24mm f/3.5-4.5 Di II LD AF SP Aspherical (IF)
  • Tamron 17-50mm f/2.8 SP AF XR Di-II LD Aspherical IF
  • Tamron 18-250mm f/3.5-6.3 AF Di-II LD Aspherical IF Macro
  • Tamron 18-200mm f/3.5-6.3 XR Di-II LD IF (2008)
  • Tamron 28-75mm f/2.8 SP AF XR Di LD Aspherical IF Macro
  • Tamron 28-80mm f/3.5-5.6 AF
  • Tamron 28-300mm f/3.5-6.3 XR DI LD
  • Tamron 70-200mm f/2.8 SP AF
  • Tamron 70-300mm f/4-5.6 DI LD Macro (2008)
  • Tamron 90mm f/2.8 SP Di Macro (No Adaptall version)
  • Tamron 90mm f/2.5 Macro (No Adaptall version)
  • Tamron 90mm f/2.8 SP AFDi 1:1 Macro
  • Tamron 300mm f/2.8 DL (Adaptall)
  • Tamron 500mm f/8 SP (Adaptall 2) Reflex(Catadioptric)


Tou/Five Star[edit]

Tou Five Star was the commercial brand from Toyo Optics, some lenses are labeled as Toyo Optics, Toyo Five Star or Tou Five Star, They were manufactured between 1967 and sometime around 1980 the company seems to have changed its focus to video lenses.

  • Tou/Five Star MC Auto 28mm 1:2.8 (to f/22) (52mm)
  • Toyo/Five Star MC Auto 28mm 1:2.8 (to f/16) (52mm)
  • Tou/Five Star 28-80mm 1:3.5-4.5 macro
  • Tou/Five Star 28-135mm 1:3.5-5.2 macro (67mm)
  • Tou/Five Star MC Auto 35-75mm 1:3.5-4.8 macro (55mm)
  • Tou/Five Star 70-210mm 1:4.5-22 macro (55mm)
  • Tou/Five Star 75-200mm 1:4.5 macro
  • Tou/Five Star MC Auto 200mm 1:4.5 (52mm)
  • Tou/Five Star 500mm 1:8




Vologda Optical-and-Mechanical Plant.

  • Mir-47K 20mm f2.5
  • Oberon-11K 200mm f2.8


Zenitar[19] is a Russian lens brand, made by KMZ. Most Zenitar lenses are also available in M42-mount. Some of these are sold as K-mount lenses but use an adapter.

Special lenses[edit]

  • Zenitar MC 35mm Tilt & Shift f2.8 (2008)
  • Zenitar MC 80mm Tilt & Shift f2.8 (2008)


More information[edit]