Pentax K mount

Pentax K mount

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, [cite web | url = http://www.bdimitrov.de/kmp/ | title = Bojidar Dimitrov's Pentax K-Mount Page | accessdate=2007-09-30 ] and has been used by all 35 mm and digital Pentax SLRs since. A number of other manufacturers have also produced many K-mount lenses and K-mount cameras.

Mounts

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.

K mount

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 of course 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' and 'SMC Pentax-M'. These K mount bodies cannot use lenses that lack an aperture ring, such as FAJ, DA or D-FA.

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

KF mount

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 [http://www.bdimitrov.de/kmp/bodies/photos/ME_F_AF35-70f2.8.jpg] 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.

KA mount

The KA mount is derived from the original K mount. It allows the lens' 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' 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' 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' maximum aperture; their meaning is dependent on the minimum aperture indicated by the lens.

KAF mount

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.

KAF2 mount

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 and K200D) the two power contacts can also power Supersonic Drive Motor lenses.

KA2 mount

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.

"Crippled" KAF mount

The "crippled" KAF mount is used on the MZ-30/ZX-30, MZ-50/ZX-50, MZ-60/ZX-60, the *ist series and the K100D/K110D. The only difference between the regular KAF mount and the crippled version is the removal of the mechanical stop-down coupler/indicator. The result is that most of these bodies can only correctly use lenses which have an "A" setting on the aperture ring or "crippled" KAF lenses. With a K/M (also known as "pre-A") lens, the body cannot tell what aperture the lens is set to with the "crippled" mount. The *ist series and K series digital cameras have a work-around which allows K/M lenses to be used in full manual exposure mode by simply pressing the AE-Lock button to stop down the lens and take a meter reading. The onbody flash only fires at full power, making it difficult with pre-A lenses (a Flash Guide Number calculation is required). This lens mount includes DA and FA-J series lenses.

"Crippled" KAF2 mount

The "crippled" KAF2 mount is found on Pentax DSLRs released beginning with the K10D. It supports the extra features of the KAF2 mount including the two power contacts for the lens. Power zoom is supported (not full support and only in K10D), as well as lenses with focus motors. Such lenses support Supersonic Drive Motor (SDM), allowing for quieter autofocus. Like the "crippled" KAF mount, it does not have a mechanical stop-down coupler/indicator and thus can only use stop-down metering on pre-A lenses.

R-K 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).

Warning: This pin will catch on the drive-shaft hole in KAF and KAF2 cameras when turning the lens to lock it in place. It will jam part way and depending on the characteristics of this pin, it may be quite difficult to remove the lens from the camera. [cite web | url=http://forums.dpreview.com/forums/read.asp?forum=1036&message=11474423 | title=Caution regarding Ricoh lenses on Pentax bodies | date=December 17 2004 | accessdate=2007-07-24 | publisher=DPreview] [cite web | url=http://forums.dpreview.com/forums/read.asp?forum=1036&message=19214685 | title=Sears 60-300 (auto aperture, push pull zoom) | date=July 15 2006 | accessdate=2007-07-24 | publisher=DPreview]

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.

Adaptors to use on k-mount

M42

Pentax supplies adaptors 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, and many old M42 lenses have a modern-day cult reputation, including the Pentax Takumar range. Some manufacturers, including Carl Zeiss AG, still make lenses in the M42 mount. Pentax cameras have the right focal distant to accept old M42 lenses without optical correction, a property shared with digital SLRs made by Canon, Olympus, Sony, Sigma, and other companies, but significantly not Nikon.

Nikon AI/AIS

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

Voigtlander Bessamatic Retina

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

Petri

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

Pentax made adapters for its medium-format lenses to use on the k-mount, both the 645 and. 6x7, 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.

-mount and T-Mount

Mount for Telescopes and generic optics.

Adaptors for other cameras to use k-mount

*Olympus 4/3
*Canon EOS
*Minolta MA (Sony Alpha)

Cameras

Pentax

Manual focus
* "K" - K2, KX, KM, K1000, K1000 SE
* "K" - ME, ME SE, ME Super, ME Super SE, MG, MV, MV1, MX
* "K" - LX
* "KA" - Super A, Program A, A3
* "KA" - P3, P5, P30, P30n, P30t
* "KA2" - MZ-M

Auto focus
* "KF" - ME F
* "KAF" - SFX, SFXn, SF7, MZ-6, MZ-7
* "KAF2" - Z-1, Z-5, Z-10, Z-20, Z-50, Z-70
* "KAF2" - MZ-S, MZ-3, MZ-5, MZ-5n, MZ-10

* "crippled" KAF" - MZ-30, MZ-50, MZ-60, *istD, *istDS(2), *istDL(2), K100D, K110D
* "crippled" KAF2" - K10D, K100D Super, K20D, K200D,K2000D

Almaz

* 103

Chinon

* CE-4, CE-4s, CA-4, CM-4
* CE-5, CG-5, CM-5, CP-5
* CP-6, CP-X
* CP-7m, CM-7
* CP-9AF

Cosina

* CS-2, CS-3
* CT-10, CT-1A, CT-20, CT-7, CT-1G, CT-9
* CE-4, CE-4s, CE-5


= Miranda =

* MS-1
* MS-2 Super
* MS-3

Porst

*Compact Reflex OC

Promaster

*Promaster 2500 PK

Ricoh

* KR-5, KR-5 Super, KR-5 Super II, KR-5 III, KR-10, KR-10 Super, KR-30sp
* XR-1, XR-1s, XR-2, XR-2s, XR-500, XR-6, XR-7, XR-10, XR-P, XR-20sp, XR-Solar, XR-M, XR-F, XR-P, XR-S, XR-X, XR-X 3PF


= Samsung [cite web | url=http://www.samsungcamera.com | title=Samsung Digital Camera | date=April 4 2008 | accessdate=2008-04-05 | publisher=Samsung Techwin (subsidiary of Samsung Group)] =

*"crippled" KAF" - GX-1S, GX-1L
*"crippled" KAF2" - GX-10, GX-20


= Sears =

A lot of Sears cameras were made by Ricoh and use the Pentax K mount. Some are simply rebadged Ricoh models, while others are quite different.

* KS-1000 (Ricoh XR-1)
* KS-500 (Ricoh XR-500)
* KS Auto (Ricoh XR-2S)
* KS-1
* KS-2 (Ricoh XR-7)
* KSX (Ricoh KR-10)
* KS Super
* KS Super II

Vivitar

* V4000
* V3800N
* V3000s
* V2000

Voigtlander

* VSLR 43 (2004)


= Zenit =

* Automat, 20, 21, 22, 14, photosniper FS-5
* AM, AM2, AP, 2000, APK, KM, 122K, 212K

List of Lenses with any K-Mount Variant

Access

*Access 28mm f2.8
*Access 75-300mm f5.6 PMC Zoom (55mm filter)

Angenieux

Angenieux is the best lens manufacturer in France, it is mainly known for its movie equipment than for photographic lenses, but it has built some of the best optics for Leica,Nikon,Canon and there is even a little number of k mount lenses. The numbers of them are very little and its quality is among the best.
*Angenieux 70-210mm f3.5

Beroflex

Beroflex seems to have been a german commercial firm of photographic lenses, not too much information is available yet but it looks like provided german designed lens made overseas by japanese companies like Soligor.
*Beroflex 85-210mm f3.8

Carl Zeiss Jena

Carl Zeiss Jena history can be found on the article on wikipedia for Zeiss, here is the list of the known lenses on k mount for it. Quality of the optics seem to be out of question, although some other dislike its plastic bodies. Made in the former German Democratic Republic its import into the US was forbidden, hence most of the used lenses come from Europe, Asia and Australia.
*Carl Zeiss Jena II 24mm f2.8
*Carl Zeiss Jena 28-70mm f2.8-4.3 Macro Jenazoom
*Carl Zeiss Jena 70-210mm f4.5-5.6 Macro
*Carl Zeiss Jena 75-300mm f4.5-5.6 ED IF MC Macro Jenazoom
*Carl Zeiss Jena 100-500mm f5.6-8 MC Macro Jenazoom (72mm filter)

Carl Zeiss

Carl Zeiss is one of the most pretigious names on the photographic world, it has re-launched its line of lenses for the k-mount strongly on 2008, mainly due to the growing popularity of both Pentax and Samsung digital SLR's.
*Carl Zeiss 18mm f3.5 Distagon T* (June 2008)
*Carl Zeiss 21mm f2.8 Distagon T* (September 2008)(Europe Only)
*Carl Zeiss 25mm f2.8 Distagon T* ZK(2008)
*Carl Zeiss 35mm f2 Distagon T* ZK(2008)
*Carl Zeiss 50mm f1.4 Planar T* ZK (2008)
*Carl Zeiss 50mm f2 Planar T* ZK (2008)
*Carl Zeiss 50mm f2 Makro-Planar T* (August 2008)
*Carl Zeiss 85mm f1.4 Planar T* ZK(2008)

Cosina

*Cosina 19-35mm f3.5-4.5 AF
*Cosina 28-210mm f4.2-6.5 Aspherical AF
*Cosina 28-210mm f3.5 Aspherical AF
*Cosina 24 mm f2.8
*Cosina 35-70mm f3.5-4.8
*Cosina 40mm f2.5
*Cosina 50mm f1.2
*Cosina 100mm f3.5 AF macro
*Cosina 100-300mm f5.6 AF macro

Cosmicar

Cosmicar is a division of Pentax, it commercialized video lenses, but some were released for the k mount.
*Cosmicar 28-80mm f3.5-4.5
*Cosmicar 70-200mm f4

CPC

CPC Lenses are also known as Phase 2 or Phase 2 CCT.
*CPC 28mm f2.8 Auto A (52mm filter)
*CPC 28-80mm f3.5-4.5
*CPC 28-85mm f3.5-4.5
*CPC 135mm f2.8 MC Auto A (55mm filter)

Chinon

*Chinon 24mm f2.5
*Chinon 28mm f2.8
*Chinon 35-70mm f3.5-4.5 MC Macro (55mm filter)
*Chinon 35-80mm f3.5-4.9 MC Macro
*Chinon 50mm f1.4 Auto Multicoated
*Chinon 50mm f1.7 Auto Multicoated Mac
*Chinon 50mm f1.9 Auto Macro (53mm filter)
*Chinon 135mm f2.8 Auto Multicoated
*Chinon Makinon 500mm f8 Catadioptric

Focal

*Focal 28mm f2.8

Gemini

*Gemini 28mm f2.8 (49mm filter)

Hanimex

Hanimex was a german manufacturer of photographic equipment, it selled rebadged cameras and lenses of different brands and specially on the Practika mount.
*Hanimex 35mm f2.8
*Hanimex 55-220mm f3.5-4.5 MC Macro(55mm filter)
*Hanimex 80-200mm f4
*Hanimex 80-200mm f4.5

Hervic Zivnon

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

Hoya

*Hoya 28-50mm f3.5-4.5 HMC(55mm filter)

JC Penney

*JC Penney 135mm f2.8

Kalimar

Kalimar was an american distibutor 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. [cite web | url=http://www.tiffen.com/kalimarpressrelease.htm| title=Kalimar Acquisition by Tiffen with some history| date=February 3 2000 | accessdate=2008-09-17 | publisher=unknown] .
*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

Kiron was a third party lens manufacturer [cite web | url=http://www.mflenses.com/content/view/55/ | title=General Reference to kiron Lenses on MFLenses| date=September 17 2008 | accessdate=2008-09-16 | publisher=MFLenses] , it manufactured lenses for other mounts as well on the decade of 1980-1990
*Kiron 24mm f2 RL
*Kiron 28mm f2

Lomo

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

Lensbaby

*Lensbaby 1.0 Selective Focus Lens (2006-2008)
*Lensbaby 2.0 Selective Focus Lens (2008)

Loreo

*Loreo 38 mm f11 3D (Stereo) (2006-Present)

Luxon

Luxon is a chinese manufacturer, information on its lenses is quite difficult.
*Luxon 50mm f2.0 MC (China)

Miranda

*Miranda 28mm f2.8 (49mm filter)
*Miranda 28mm f2.8 MC (55mm filter)
*Miranda 70-210mm f4.5 Macro
*Miranda 75-200mm f4.5-5.3 Macro (52mm filter)

Mitakon

Mitakon 80-200mm f4.5 MC Zoom (55mm filter)

Oberon

*Oberon-11K 200mm f2.8


=Petri=

Petri was a japanese camera manufacturer, it seems to be that at some point 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:
*Petri 28mm f2

Pentax

*Pentax DA 10-17mm f3.5-4.5 ED IF
*SMC PENTAX-DA 1:4 12-24mm ED AL (IF) (2007- )
*Pentax DA 14mm f2.8 SMC ED IF (2007)
*Pentax SMC 15mm f3.5
*SMC PENTAX-DA 1:4 16-45mm ED -AL 2003-
*SMC PENTAX-DA* 1:2.8 16-50mm ED AL (IF) SDM 2007-
*Pentax SMC DA 16-45 f4
*Pentax DA* 16-50 f2.8 (2008)
*Pentax DA 16-50 f2.8 AL ED IF
*Asahi Pentax Takumar 17mm f4
*Pentax SMC-DA 17-70mm f4 AL IF SDM(2008-)
*Pentax SMC-K 18mm f3.5
*Pentax SMC-M 20mm f4
*Pentax SMC-FA* 24mm f2
*Pentax SMC 24-50mm f4
*Pentax smc FA 24-90mm f3.5-4.5 AL IF (2007-)
*Pentax SMC-FA* 28-70mm f2.8
*Pentax SMC-K 30mm f2.8
*Pentax smc P-FA 31mm f1.8 (2007)
*Pentax SMC 35mm f2.8
*Pentax SMC-M 35mm f2.0
*Pentax DA smc 35mm f2.8
*Pentax SMC-M 40mm f2.8 "pancake"
*Pentax SMC-FA 43mm f1.9 Limited (Black) "pancake"
*Pentax SMC-FA 43mm f1.9 Limited (Silver) "pancake"
*Pentax DA* 50-135 f2.8 SMC ED IF SDM (2007)
*Pentax FA 50mm f1.4
*Pentax 50mm f1.2
*Pentax A 50mm f1.2
*Pentax SMC-M 50mm f1.2
*Pentax 50mm f1.4
*Pentax A 50mm f2 SMC
*Pentax SMC FA 50mm f1.4
*Pentax SMC 50mm f1.7
*Pentax 50mm f1.7
*Pentax SMC M 50mm f1.4
*Pentax SMC-A 50mm f2.8 Macro
*Pentax DA 70mm f1.4 Limited (2007)
*SMC SMC PENTAX-DA 1:2.4 70mm Limited 2006-
*Pentax FA J 75-300mm f4.5-5.6 ED IF
*Pentax SMC A 80-200mm f4.7-5.6
*Pentax SMC FA 80-320mm f4.5-5.6
*Pentax SMC 85-210mm f4.5
*Pentax-K SMC 85 f1.8 Super-Takumar
*Pentax-M SMC 85 f2 Super-Takumar
*Pentax SMC 85 f1.9
*Pentax 85 f1.9 Super-Takumar
*SMC PENTAX-M 1:2 85mm 1977-1984
*SMC Pentax A* 1:1.4 85mm 1984 ~ 1989
*SMC PENTAX FA* 1:1.4 85mm 1992 ~ 2004
*SMC PENTAX MACRO 1:4 100mm K
*SMC PENTAX-A MACRO 1:4 100mm
*SMC PENTAX-A MACRO 1:2.8 100mm 1985 ~ 1989
*SMC PENTAX-M 1:2.8 100mm 1977-1984
*Pentax SMC 135mm f2.5
*Pentax Takumar 135mm f2.5
*Pentax Takumar 135mm f2.8
*smc PENTAX-A 1:2.8 135mm 1985-1989
*SMC PENTAX-A* 1:1.8 135mm 1984-1989
*Pentax-M Asahi 135mm f3.5
*Pentax SMC-A 135-600mm f6.7
*Pentax SMC 200mm f2.5
*SMC PENTAX-A* 1:2.8 200mm ED 1984-1998
*SMC PENTAX-DA* 1:2.8 200mm ED (IF) SDM 2007-
*SMC PENTAX-FA* 1:2.8 200mm IF & ED 1993-2004
*Pentax SMC-M* 300mm f4
*Pentax SMC-A 400mm f5.6
*Pentax SMC 400-600mm f8-12 Reflex(Catadioptric)
*Pentax 1000mm f11 SMC Reflex (Catadioptric)
*smc PENTAX-A* 1200mm f8 ED IF

Special lenses

*Pentax SMC 28mm f3.5 Shift Lens
*Pentax SMC 85mm f2.2 Soft Focus Lens
*Pentax Stereo Adapter I
*Pentax Stereo Adapter II

Accesories

*Pentax 1.4x-L Teleconverter
*Pentax 2x-L Teleconverter
*Pentax-A 2x-s Teleconverter

Phoenix

*Phoenix 500mm f8 Reflex(Catadioptric) (2006)
*Phoenix 800mm f8 Reflex(Catadioptric) (2008)

Polar

Polar is a japanese third party lens manufacturer.
*Polar 800mm f8 Reflex(Catadioptric) (2008)

Porst

*Porst 55mm f1.2 Reflex MC Auto (55mm filter)
*Porst 55mm f1.2 MC Auto
*Porst 75-260mm f4.5
*Porst 200mm f3.5

Promaster

*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 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

Revue

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

Revu

*Revu 50mm f1.2 (1975)

Revuenon

*Revuenon 55mm f1.2
*Revuenon 135 f2.8

Rokinon

This lens uses the Ricoh KR mount version:
*Rokinon 500mm f6.3 Reflex (Catadioptric)

akar

Sakar is a commecial american company that used to sell k mount lenses. [Sakar Current Corporate website [http://www.sakar.com Sakar Corp.] ]
*80-210mm f1:3.8 macro MC (58mm filter)

chneider-Kreuznach

All these lenses had been marketed by Samsung and are those present on Samsung's digital SLRs [ [www.schneiderkreuznach.com/index_e.htm Schneider Kreuznach Site] ]
*Schneider-Kreuznach D-Xenogon 35mm f2 (2006-)
*Schneider-Kreuznach D-Xenon 18-55mm f3.5-5.6 AF (2007- )
*Schneider-Kreuznach D-Xenon 100mm MACRO 1:2.8 (2007-)
*Schneider-Kreuznach D-Xenogon 10-17mm F3.5-4.5 ED (2007- )
*Schneider-Kreuznach D-Xenon 12-24mm f4 ED (2007- )
*Schneider-Kreuznach D-Xenon 50-200mm f/4-5.6 AF (2006-)

pecial lenses

*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

Sears is an american comercial company that sell relabeled lenses and cameras on 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 where made to fit Sears Cameras with the Ricoh K mount version and are identified as KR, but is prudent to verify it before to use in more modern cameras that may be damaged by the Ricoh pin.
*Sears 50mm f1.4 Auto MC
*Sears 50mm f1.7 Auto MC
*Sears 55mm f1.4
*Sears 55mm f2
*Sears 28-70mm 1:3.5-4.5 Macro
*Sears 60-300mm f4-5.6 Macro (KR mount)
*Sears 75-260mm f4.5 MC Macro
*Sears 80-200mm f4-5.6 Auto MC
*Sears MC 135mm f2.8
*Sears Auto 2X Teleconverter

Sigma

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 sensor 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 15-30MM f3.5-5.6 AF EX DG
*Sigma 17-35mm f2.8-4 EX ASP
*Sigma 17-70mm f2.8-4.5 DC Macro
*Sigma 17-70mm f2.8-4.5 DC Macro (2007)
*Sigma 18-50mm f3.5-5.6 DC AF
*Sigma 18-50mm f2.8 EX DC
*Sigma 18-200mm f3.5-5.6 DC
*Sigma 20mm f1.8 EX DG ASP
*Sigma 20-40mm f2.8 EX DG ASP
*Sigma 24mm f1.8 EX DG
*Sigma 24-70mm f3.5-5.6
*Sigma 24-70mm f2.8 EX ASP
*Sigma 24-135mm f2.8-4.5 IF ASPH AF
*Sigma 28mm f1.8 EX DG
*Sigma 28-70mm f2.8 EX DF ASP
*Sigma 28-300mm f3.5-6.3 DL ASP IF
*Sigma 28 f1.8 EX DG
*Sigma 28-300mm f3.5-6.3 CHZ ASP
*Sigma 28-200mm f3.5-5.6 DL Macro
*Sigma 28-200mm f3.5-5.6
*Sigma 28-105mm f2.8-4 ASP
*Sigma 28-80mm f2.8 EX DF ASP Macro II
*Sigma 28-80mm f2.8 EX DF ASP Macro
*Sigma 30mm f1.4 EX DC
*Sigma 50mm f2.8 EX Macro
*Sigma 50-500mm f4-6.3 EX APO HSM
*Sigma 70-200mm f2.8 EX DG Macro
*Sigma 70-200mm f2.8 EX APO
*Sigma 70-300mm f4-5.6 DG APO Macro
*Sigma 70-300mm f4-5.6 DG Macro
*Sigma 70-300mm f4-5.6 DI LD Macro (2008)
*Sigma 70-300mm f4-5.6 DL Macro
*Sigma 70-300mm f4-5.6 DG Macro
*Sigma 70-300mm f4-5.6 EX APO Macro
*Sigma 100-300mm f4.5-6.7 DL
*Sigma 100-300mm f4 EX APO IF
*Sigma 100-300mm f4.5-6.7 DL
*Sigma 105mm f2.8 EX Macro
*Sigma 135-400mm f4.5-5.6 APO ASP
*Sigma 170-500mm f5-6.3 APO ASP
*Sigma 180mm f3.5 EX Macro
*Sigma 500mm f8 Reflex (Catadioptric)
*Sigma 500mm f4 XQ Reflex (Catadioptric)
*Sigma 600mm f8 Reflex (Catadioptric)

oligor

*Soligor 70-210 f4.5
*Soligor 135mm f2.8

un

*Sun 80-200mm f4.5 Macro (55mm filter)

untop

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

Tamron

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 comercialize those for specific brands with the use of the Adaptall I and Adaptall II adapters. So there is 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 18-250mm f3.5-6.3 AF Di-II LD Aspherical IF Macro
*Tamron 18-200mm f3.5-6.3 XR Di-II LD IF (2008)
*Tamron 70-300mm f4-5.6 DI LD Macro (2008)
*Tamron 90mm f2.8 SP Macro (No Adaptall version)
*Tamron 90mm f2.5 Macro (No Adaptall version)
*Tamron SP AF90mm f2.8 Di 1:1 Macro
*Tamron 300mm f2.8 DL (Adaptall) Reflex(Catadioptric)
*Tamron 500mm f8 SP (Adaptall 2) Reflex(Catadioptric)

Tokina

*Tokina 17mm f3.5
*Tokina 28mm f2.8
*Tokina 28-70mm f2.8 (several models)
*Tokina 80-200mm f2.8
*Tokina 75-150mm f3.8
*Tokina 80-200mm f4.5-5.6 SZ-X (49mm filter)
*Tokina 150-500mm f5.6 AT-X SD
*Tokina 500mm f8 RMC Reflex(Catadioptric)

Tou/Five Star

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 28-80mm 1:3.5-4.5 macro
*Tou/Five Star 28-135mm 1:3.5-5.2 macro (67mm)
*Tou/Five Star 75-200mm 1:4.5 macro
*Tou/Five Star 500mm f8

Vivitar

*Vivitar 24mm f2
*Vivitar 24-70mm f3.3-4.8 Series 1
*Vivitar 28-85mm f2.8-3.8
*Vivitar 28-105mm f2.8-3.8 Series 1
*Vivitar 35-200mm f3-4.5 Macro 1:5 (65mm filter)
*Vivitar 50mm f1.4 VMC
*Vivitar 55mm f1.2 Series I
*Vivitar 70-210mm f2.8-4 Series 1
*Vivitar 75-200mm f4.5
*Vivitar 85-205mm f3.8
*Vivitar 90mm f2.5 SL I Macro (2002-?)
*Vivitar 90-180mm f4.5 macro
*Vivitar 135 f2.8
*Vivitar 200 f3 Series 1

Voigtländer

*Voigtländer 35-70mm f3.5-4.8 (2004)
*Voigtländer 40mm f2 SL II Ultron Aspherical (2008,limited)
*Voigtländer 40mm f2 SL I Ultron Aspherical (2007,limited)
*Voigtländer 58mm f1.4 Nokton (2008)
*Voigtländer 58mm f1.4 SL II Topcor (2008, SL I never available for K Mount)
*Voigtländer 75mm f2.5 Color-Heliar (2002-200?)
*Voigtländer 90mm f3.5 APO-Lanthar
*Voigtländer SL 125mm f2.5 APO-Lanthar (2002-2006)
*Voigtländer SL II 125mm f2.5 APO-Lanthar (2007)
*Voigtländer SL II 180mm APO-Lanthar f4 (2007)
*Voigtländer SL 180mm APO-Lanthar f4 (2002-2006)

Zenitar

Zenitar is a russian lens manufacturer , these are the first k mount lens they make, most previous versions had been M42 with a k mount adapter.
*Zenitar-K 16mm f2.8 (2008)
*Zenitar MC Mir-47K 20mm f2.5 (2008)
*Zenitar MC APO Telezenitar-K 300mm f4.5 (2008)
*Zenitar MC Variozenitar-K 25-45mm f2.8-3.5 (1980-? version)(60mm filter)
*Zenitar MC Variozenitar-K 25-45mm f2.8-3.5 (2008)
*Zenitar MC Variozenitar-K 35-100mm f2.8 (1980?)

pecial Lenses

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

References

More information

* [http://www.pentaximaging.com/products/cameras/lenses/compatability_chart.jsp Pentax Imaging: Lens compatibility chart]
* [http://www.bdimitrov.de/kmp/ Bojidar Dimitrov's Pentax K-Mount Page]
* [http://www.butkus.org/chinon/ultimate_k-mount.htm List of cameras with a Pentax K mount]
* [http://www.aohc.it/slre.htm AOHC: Asahi & Pentax SLR names and dates]
* [http://plg.komkon.org List of Pentax K lenses and some comparison on bokeh and flare, also selected non-Pentax ones]
* [http://www.ohse.de/uwe/articles/shift-tilt.html Shift/Tilt Lenses for 35mm cameras]


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