Pentax K-mount

{{Refimprove|date=December 2024}} {{short description|Series of camera lens mounts made by Pentax}} {{Infobox camera mount | mount_name = Pentax K-mount | image = Pentax K1000 lens off.jpg | caption = [[Pentax K1000]] without lens, showing the original K mount | type = bayonet | external_diameter = | inner_diameter = | tabs = 3 | flange = | connectors = electrical pins, drive shaft for focus. }}

The '''Pentax K-mount''', sometimes referred to as the “PK-mount", is a [[Bayonet mount|bayonet]] [[lens mount]] standard for mounting interchangeable [[photographic lens]]es to [[135 film|35 mm]] [[single-lens reflex]] (SLR) [[camera]]s. It was created by [[Pentax]] in 1975,<ref>{{cite web | url = http://kmp.pentaxians.eu/technology/summary/ | title = Bojidar Dimitrov's Pentax K-mount page | access-date = 2021-04-11}}</ref> and has since been used by all Pentax [[135 film|35 mm]] and digital [[Digital single-lens reflex camera|SLRs]] and also the [[Mirrorless interchangeable-lens camera|MILC]] [[Pentax K-01]]. 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.

Originally designed by [[Carl Zeiss AG|Zeiss]] for an alliance with Pentax, 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.<ref>{{cite web | url = https://www.eoshd.com/news/60-pentax-lens-thats-actually-a-800-zeiss-by-designer-of-stanley-kubricks-nasa-glass/ | title = $60 Pentax that's actually a $800 Zeiss by designer of Stanley Kubrick's NASA glass - EOSHD.com - Filmmaking Gear and Camera Reviews | access-date = 2021-04-11}}</ref>

=== 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 (optics)|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 [[Pentax LX|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 “modified" KAF-mount bodies (see below).

=== KF-mount === [[File:Pentax ME-F.jpg|thumb|[[Pentax ME F]] and SMC Pentax-AF 35-70/2.8, the only products using the 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 [[Pentax AF 35-70 mm lens|SMC Pentax-AF 35-70/2.8]]. The lens was somewhat large and cumbersome 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 (company)|Canon]] in the ill-fated [[Canon T80]], introduced several years later.

The ME F can use all Pentax K-mount lenses which feature 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 “modified" KAF bodies.

=== KA-mount === [[File:Pentax A 50mm F1.7.jpg|thumb|right|Pentax A 50 mm 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 [[Exposure (photography)|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 stop]]s 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. (There are at least 2 newer lenses that have a minimum aperture of only f/16: HD D FA 85mm F1.4 and HD D FA* 50mm F1.4. https://www.pentaxforums.com/lensreviews/hd-pentax-d-fa-85mm-f14-sdm-aw.html and https://www.pentaxforums.com/lensreviews/hd-pentax-d-fa-50mm-f14-sdm-aw.html)

=== KAF-mount === [[File:Foto, PENTAX Objektiv, smc PENTAX-F 24-50mm F4, IMGP0649, gerade Draufsicht auf die Bajonettseite.jpg|thumb|right|PENTAX-F lens with KAF mount; note mechanical coupling (at 12 o'clock position) for in-body focus motor, seventh (digital) contact at 9 o'clock, and KA aperture encoding pins between 9 and 10 o'clock.]] 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.

=== KAF2-mount === [[File:KAF2-2.jpg|thumb|right|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]] 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 [[optical transfer function|modulation transfer function]] (MTF) data through the digital seventh contact. The power contacts were originally used for power zooming. Since the introduction of the [[Pentax K10D|K10D]] digital SLR model, they are mainly used for powering [[Ultrasonic motor|Silent Drive Motor]] and [[DC motor]] lenses.

The [[Pentax K10D|K10D]]/[[Pentax K100D Super|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.

=== 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.

=== KAF3-mount === The KAF3-mount is used on Pentax lenses that solely rely on [[Ultrasonic motor|SDM]] or [[DC motor|DC]] autofocus motors. It is identical to the KAF2, but lacks the screw-drive autofocus drive shaft.<ref name="history of the K-mount">{{cite web |url=http://www.pentaxforums.com/articles/photo-articles/evolution-of-pentax-k-mount.html |title=The Evolution of the Pentax K-mount – Technical Information and a Little Bit of History |author= |date=29 December 2014|website=pentaxforums.com |access-date=14 June 2016 }}</ref> Another way of looking at it is that it adds the power zoom/in-lens autofocus motor contacts to the KA2 mount.

=== KAF4-mount === The KAF4-mount was introduced in June 2016 with the ''HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE'' lens. It is identical with KAF3, apart from the missing aperture control lever. Instead, aperture control information is transmitted digitally through the data pin and the aperture is stopped down through a motor built into the lens. It also introduced a new type of autofocus motor, designated ''PLM'' or ''Pulse Motor''. At the time of its introduction, the following Pentax DSLR bodies were compatible with the new mount: [[Pentax K-70|K-70]], [[Pentax K-50|K-50]], [[Pentax K-S2|K-S2]], [[Pentax K-S1|K-S1]], [[Pentax K-1|K-1]], [[Pentax K-3 II|K-3 II]], with all but the K-70 requiring a firmware update. Also after a recent firmware update the original K3 can use the new mount.<ref name="history of the K-mount"/>

=== K-mount without aperture simulator coupling === All digital K-mount Pentax SLR bodies as well as some lower-end film cameras lack the ability to read the position of the aperture simulator. This means that lenses that lack the lens information contacts introduced with the KA-mount (Pentax K- and M-series lenses as well as some third-party products) do not support open-aperture metering on these bodies. Instead, stop-down metering must be carried out by pushing the “green button” on the camera before taking a shot. This variation of the mount is commonly referred to as the “modified“ K-mount.<ref name="history of the K-mount"/>

=== 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, commonly dubbed ''Ricoh pin'',<ref name="history of the K-mount"/> 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 '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.

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, as it can otherwise become locked within the autofocus shaft.<ref name="history of the K-mount"/> Lenses locked to the camera body this way are difficult to remove and may require complete dismantling.

==Compatibility within the K-mount ecosystem== While the common K-mount allows any Pentax lens suited for the mount to be adapted to any Pentax camera having any of its variation, not all features are compatible across different generations of mounts and lenses.

==Adaptors to use on K-mount==

===L39 / LTM=== 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 10 cm. 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.

===M39=== Adaptors can be found to allow use of a non-Leica 39 mm 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.

===M42=== [[File:Adapter M42 PK Objektiv LvT.jpg|thumb|M42 lens (Beroflex) with Pentax K-mount adapter]] Pentax supplies adapters to fit [[M42 lens mount|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<ref>{{Cite web |url=http://www.pentaxwebstore.com/detail/PTX+30120 |title=PentaxWebstore Mount Adapter B (35mm Screwmount to Bayonet) |access-date=2009-06-02 |url-status=usurped |archive-url=https://web.archive.org/web/20090725082744/http://www.pentaxwebstore.com/detail/PTX+30120 |archive-date=2009-07-25 }}</ref> 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{{who|date=August 2016}} of third-party infinity-focus adapters, such as Bowers, report difficulty in removing the adapters from camera bodies.{{citation needed|date=August 2016}} 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 EF-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).

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

=== Voigtländer Bessamatic / Kodak Retina === Adapter for [[Voigtländer Bessamatic]] and [[Voigtländer Ultramatic]] lenses, [[Kodak Retina Reflex]], or [[Kodak Retina III]]s lenses.

===Petri=== There are some [[Petri Camera|Petri]] adapters to K-mount but they do not allow to infinity focus due to the different flange distance.

===Medium format=== 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

=== T-mount === Mounts used for telescopes, microscopes and generic optics. The [[T-mount]] was initially developed by [[Tamron]] (1957) to allow the easy adaption of generic 35 mm SLR optics into multiple mounts. The T-mount is a 42 mm diameter 0.75 mm pitch screw mount with a 55 mm [[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 that while both T-mount and M42-mount are 42mm screw mount systems, and will mount if they are forced, they are not compatible. The difference in pitch can cause damage to the lens, adapter or camera mount if they are confused.{{citation needed|date=August 2016}}

===Adaptall=== These are adaptors designed by Tamron to allow the transfer of aperture 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.<ref>{{cite web|url=http://www.adaptall-2.com/|title=Tamron Adaptall-2 lenses - Adaptall-2.com|first=MEM-TEK, Ellijay|last=GA|website=www.adaptall-2.com|access-date=22 April 2018}}</ref>

==Available adaptors for other cameras to use K-mount==

*[[Four Thirds system|Four Thirds]] (Olympus) *[[Micro Four Thirds system|Micro Four Thirds]] (Olympus and Panasonic) *[[Canon EF-mount]] (EOS) *[[Minolta A-mount|Minolta/Sony A-mount]] (Sony Alpha) *[[M39 lens mount]] (Leica) *[[Samsung NX-mount]] *[[Sony E-mount]] (NEX) *[[Fujifilm X-mount]]

== Cameras == {{Col-begin}} {{Col-2}}

===[[Pentax]]=== '''Manual focus''' * ''K'' – K2, K2 DMD, KX, KM, [[Pentax K1000|K1000]], K1000 SE * ''K'' – ME, ME SE, [[Pentax ME Super|ME Super]], ME Super SE, MG, MV, MV1, [[Pentax MX|MX]] * ''K'' – [[Pentax LX|LX]] * ''KA'' – [[Pentax Super-A|Super A]], Program A/Program Plus, A3 * ''KA'' – P3, P5, P30, P30n, P30t * ''KA2'' – MZ-M

=== [[Almaz (camera)|Almaz]] === * 101 * 102 * 103 * 104

=== [[Chinon Industries|Chinon]] ===

* CE-4, CE-4s, CA-4, CA-4s, CM-4, CM-4s * CE-5, CG-5, CM-5, CP-5, CP5s * CP-6, CP-X * CP-7m, CM-7 * CP-9AF

=== Carena ===

* KSM-1

=== Cimko ===

* ksx sears 35 mm film and a 50 mm lens

=== [[Cosina]] ===

* C1, C1s * CS-2, CS-3 * CT-10, CT-1A, CT-20, CT-7, CT-1G, CT-9, CT-4 * CE-4, CE-4s, CE-5

=== Edixa ===

* CX 5

=== Exakta ===

* HS-1 * HS-2 * HS-4 * HS-10 * HS-40 * KE 5

=== Lindenblatt ===

* KL-2

=== [[Miranda Camera Company|Miranda]] ===

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

=== Porst ===

* Compact Reflex OC * Compact Reflex OCN

=== Promaster ===

* Promaster 2500 PK

=== Quantaray ===

* D2-RZ

=== [[Ricoh]] ===

* KR-5, KR-5 Super, KR-5 Super II, KR-5 III, KR-10, KR-10 Super, KR-10M, KR-30sp * XR-1, XR-1s, XR-2, XR-2s, XR-500, XR500 auto, 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]] === Source:<ref>{{cite web | url=http://www.samsungcamera.com | title=Samsung Digital Camera | date=April 4, 2008 | access-date=2008-04-05 | publisher=[[Samsung Techwin]] (subsidiary of [[Samsung Group]]) | archive-url=https://web.archive.org/web/20080405092600/http://www.samsungcamera.com/ | archive-date=April 5, 2008 }}</ref> *''“modified" KAF'' - GX-1S, GX-1L *''“modified" KAF2'' - [[Samsung GX-10|GX-10]], [[Samsung GX-20|GX-20]]

=== [[Sears, Roebuck and Company|Sears]] ===

A lot of Sears cameras were made by Ricoh or Chinon and use the Pentax K-mount. Some are simply rebadged 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) * KSX-P (Chinon CP-5) * KS Super * KS Super II

=== [[Sigma Corporation|Sigma]] ===

* SA-1

=== [[Topcon]] ===

* RM300

=== [[Vivitar]] ===

* V635 * V4000 * V3800N * V3000N * V3000s * V2000 * XV1 (rebadged Cosina CT-1) * XV20 (rebadged Cosina CT-20)

=== [[Cosina Voigtländer]] ===

* [[Cosina Voigtländer]] VSL 43 (2004)

=== [[Zenit (camera)|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 28 mm f2.8 P-MC Macro (49 mm filter) *Access 75–300 mm f5.6 PMC Zoom (55 mm filter)

===[[Angenieux]]=== Angenieux a lens manufacturer in [[France]], mainly known for its movie equipment than for photographic lenses, but it has built optics for [[Leica Camera|Leica]], [[Nikon]], [[Canon (company)|Canon]] and a few K-mount lenses. *[[Angenieux]] 70–210 mm f3.5

===[[Agfa]]=== The Agfa K mount cameras were rebadged Chinons. *[[Agfa]] Color 50 mm f1.4 (49 mm filter)

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

*PCS Arsat 35 mm f2.8 Shift Lens

===Beroflex=== Beroflex seems to have been a German commercial firm of photographic lenses;information is scarce yet but it appears that it designed lenses made overseas by Japanese companies like [[Soligor]]. *[[Beroflex]] 85–210 mm f3.8 * Beroflex 500 mm f8/f22 lens, 5° view; 72 mm diameter × 42 mm. Adapter fitted for use on M42 screw thread. In 1975 came complete with lens caps and case.

===Braun=== Carl Braun Camera-Werk of Nuremberg, Germany, or Braun, as it was more commonly called, was founded as an optical production house. It is best known for its 35mm film cameras named Paxette, and for slide projectors named Paximat. *Braun Ultralit Zoom 28–70 mm f3.4-4.8

===Carl Zeiss Jena=== Carl [[Carl Zeiss AG|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" 35 mm East German made Carl Zeiss Jena Lenses were available at the same time but only in Praktica B-mount.

*[[Carl Zeiss AG|Carl Zeiss Jena]] 20 mm f4 (zebra) *[[Carl Zeiss AG|Carl Zeiss Jena]] II 24 mm f2.8 *[[Carl Zeiss AG|Carl Zeiss Jena]] 28 mm f2.8 *[[Carl Zeiss AG|Carl Zeiss Jena]] 28–70 mm f2.8-4.3 Macro Jenazoom *[[Carl Zeiss AG|Carl Zeiss Jena]] 70–210 mm f4.5-5.6 Macro *[[Carl Zeiss AG|Carl Zeiss Jena]] 75–300 mm f4.5-5.6 ED IF MC Macro Jenazoom *[[Carl Zeiss AG|Carl Zeiss Jena]] 100–500 mm f5.6-8 MC Macro Jenazoom (72 mm filter)

===Carl Zeiss=== 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 [[Digital single-lens reflex camera|SLR]]s. Carl Zeiss announced in September 2010 that the ZK lenses would be discontinued that year. [https://web.archive.org/web/20110727090554/http://www.zeiss.com/C1256A770030BCE0/WebViewTopNewsAllE/8E06D1CFA00E171BC12577A600262035?OpenDocument] *[[Carl Zeiss AG|Carl Zeiss]] 18 mm f3.5 Distagon T* (June 2008) *[[Carl Zeiss AG|Carl Zeiss]] 21 mm f2.8 Distagon T* (September 2008) (Europe Only) *[[Carl Zeiss AG|Carl Zeiss]] 25 mm f2.8 Distagon T* ZK (2008) *[[Carl Zeiss AG|Carl Zeiss]] 35 mm f2 Distagon T* ZK (2008) *[[Carl Zeiss AG|Carl Zeiss]] 50 mm f1.4 Planar T* ZK (2008) *[[Carl Zeiss AG|Carl Zeiss]] 50 mm f2 Planar T* ZK (2008) *[[Carl Zeiss AG|Carl Zeiss]] 50 mm f2 Makro-Planar T* ZK (August 2008) *[[Carl Zeiss AG|Carl Zeiss]] 85 mm f1.4 Planar T* ZK (2008) *[[Carl Zeiss AG|Carl Zeiss]] 100 mm f2 Makro-Planar T* ZK

=== [[Chinon Industries|Chinon]] === *[[Chinon Industries|Chinon]] 24 mm f2.5 *[[Chinon Industries|Chinon]] 28 mm f2.8 *[[Chinon Industries|Chinon]] 35 mm f2.8 AUTO CHINON MULTI-COATED (49 mm filter) *[[Chinon Industries|Chinon]] 35–70 mm f3.3-4.5 MC Auto Focus (52 mm filter) *[[Chinon Industries|Chinon]] 35–70 mm f3.5-4.5 MC Macro (55 mm filter) *[[Chinon Industries|Chinon]] 35–80 mm f3.5-4.9 MC Macro *[[Chinon Industries|Chinon]] 35–100 mm f3.5-4.3 multicoated CLOSE FOCUS (67 mm filter) *[[Chinon Industries|Chinon]] 45 mm f2.8 Auto Multicoated *[[Chinon Industries|Chinon]] 50 mm f1.4 Auto Multicoated *[[Chinon Industries|Chinon]] 50 mm f1.7 Auto Multicoated *[[Chinon Industries|Chinon]] 50 mm f1.7 Auto Multicoated Auto Focus (58 mm filter) *[[Chinon Industries|Chinon]] 50 mm f1.9 Auto (52 mm filter) *[[Chinon Industries|Chinon]] 135 mm f2.8 Auto Multicoated *[[Chinon Industries|Chinon]] 200 mm f3.3 Auto Multicoated *[[Chinon Industries|Chinon]] Makinon 500 mm f8 [[catadioptric]]

===Cima Kogaku=== Cima Kogaku had a patented<ref>{{cite web | url=https://patents.google.com/patent/US4174167| title=US Patent 4,174,167| date=November 13, 1979 | publisher=US Patent and Trademark Office}}</ref> 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 24 mm f2.8 *Cimko MT 28 mm f2.8 *Cimko MT 35 mm f2.8 *AM Topcor 55 mm f1.7 *Cimko MT 135 mm f2.8 *Cimko MT 200 mm f3.3 *Cimko MT 28–50 mm f3.5-4.5 (two touch) *Cimko MT 28–50 mm f3.5-4.5 (one touch) *Cimko MT 28–80 mm f3.5-4.5 *Cimko MT 35–100 mm f3.5-4.3 *Cimko MT 55–230 mm f3.5-4.5 *Cimko MT 70–200 mm f3.8-4.8 *Cimko MT 80–200 mm f3.8 *Cimko MT 80–200 mm f4.5

===Cosina=== *[[Cosina]] 19–35 mm f3.5-4.5 AF *[[Cosina]] 24 mm f2.8 MC macro (KA-mount) *[[Cosina]] 28 mm f2.8 macro (KA-mount) *[[Cosina]] 28–210 mm f4.2-6.5 Aspherical AF *[[Cosina]] 28–210 mm f3.5 Aspherical AF *[[Cosina]] 28 mm f2.8 *[[Cosina]] 35–70 mm f3.5-4.8 *[[Cosina]] 40 mm f2.5 *[[Cosina]] 50 mm f1.2 *[[Cosina]] 50 mm f2 *[[Cosina]] 55 mm f1.2 *[[Cosina]] 100 mm f3.5 AF macro *[[Cosina]] 100–300 mm f5.6 AF macro *[[Cosina]] 135 mm 1:2,8 MC

=== Cosmicar === Cosmicar is a division of Pentax, it commercialized video lenses, but some were released for the K-mount. *MC Cosmicar 28 mm f2.8 (28 mm filter) *MC Cosmicar 28–80 mm f3.5-4.5 (Macro at 80 mm end; KA mount) *Cosmicar 70–200 mm f4

=== CPC === CPC Lenses are also known as Phase 2 or Phase 2 CCT. *CPC 28 mm f2.8 Auto A (52 mm filter) *CPC 28-80 f2.8-4.0 (62 mm filter) *CPC 28–80 mm f3.5-4.5 *CPC 28–85 mm f3.5-4.5 *CPC 135 mm f2.8 MC Auto A (55 mm filter)

===Eikor=== * Eikor 28mm f2.8 (49mm filter) * Eikor 80-200mm f4.5 (55mm filter)

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

===Gemini=== *Gemini 28 mm f2.8 (49 mm filter) *Gemini 1:4.5 80-200mm Macro MC Zoom 55 (55mm filter thread size).

=== Hanimex === [[Hanimex]] was an Australian distributor founded by Jack Hannes after the Second World War. <ref name='avhub'>{{cite web|archive-url=https://web.archive.org/web/20140201120730/http://www.avhub.com.au/index.php/Features/Camera/the-australian-way/All-Pages.html|author=Paul Burrows|date=2012-10-05|title=The Australian Way|archive-date=2014-02-01|url=http://www.avhub.com.au/index.php/Features/Camera/the-australian-way/All-Pages.html}}</ref> The name is a contraction of HANnes IMport and EXport<ref name='idea_aus'>{{cite web|url=https://www.ideaaustralia.com/jack-hannes-1923-2005/|author=Paul Curtis|title=JACK HANNES: 1923-2005: Hanimex and the Founding Distributor of Fujifilm in Australia|archive-url=https://web.archive.org/web/20210115170924/https://www.ideaaustralia.com/jack-hannes-1923-2005/|archive-date=2021-01-15|quote=[Hanimex was named after] the first three letters of [Hannes'] name and the words IMport and EXport}}</ref> 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 *Hanimex MC 80–200 mm f4.5

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

===Helios=== Made for the Zenit cameras by KMZ *MC Helios 44K-4 58 mm f2 (52 mm filter) *MC Helios 77K-4 50 mm f1.8

===Hoya===

[[Hoya Corporation|Hoya]], a leading manufacturer of optical glass, purchased Pentax in 2008.

*Hoya 24mm f2.8 HMC *Hoya 28 mm f2.8 HMC (52 mm filter) *Hoya 28–50 mm f3.5-4.5 HMC (55 mm filter) *Hoya 28–85 mm f4 HMC (72 mm filter) *Hoya 70–150 mm f3.8 HMC (55 mm filter) *Hoya 100–300 mm f5 macro HMC (62 mm filter) *Hoya 135 mm f2.8 macro HMC (52 mm filter) *Hoya 300mm f5.6 HMC *Hoya 135mm f2.8 HMC *Hoya 200mm f4.0 HMC

===Irix=== *Irix 11 mm f/4.0 Blackstone *Irix 11 mm f/4.0 Firefly *Irix 15 mm f/2.4 Blackstone *Irix 15 mm f/2.4 Firefly

===JC Penney=== *JC Penney 135 mm f2.8

=== Kalimar === Kalimar was an American distributor of camera equipment from 1952 to 1999 when it was acquired by [[Tiffen (company)|Tiffen]].<ref>{{cite web| url=http://www.tiffen.com/kalimarpressrelease.htm| title=Kalimar Acquisition by Tiffen with some history| date=February 3, 2000| access-date=2008-09-17| publisher=unknown| archive-url=https://web.archive.org/web/20140129033325/http://www.tiffen.com/kalimarpressrelease.htm| archive-date=January 29, 2014}}</ref> *Kalimar 28 mm f2.8 Macro (52 mm filter) *Kalimar 28–105 mm f3.5-4.5 Macro *Kalimar 35–70 mm f2.8 *Kalimar 60–300 mm f4-5.6 MC AF (67 mm filter) *Kalimar 500 mm f8 (72 mm filter) ([[catadioptric]])

=== Kiron === Kiron was a third party lens manufacturer,<ref>{{cite web | url=http://www.mflenses.com/content/view/55/ | title=General Reference to kiron Lenses on MFLenses| date=September 17, 2008 | access-date=2008-09-16 | publisher=[[MFLenses]] |archive-url = https://web.archive.org/web/20080418010132/http://www.mflenses.com/content/view/55/  |archive-date = 2008-04-18}}</ref> it manufactured lenses for other mounts as well on the decade of 1980-1990 *[[Kiron Lenses|Kiron]] 24 mm f2 RL *[[Kiron Lenses|Kiron]] 28 mm f2 *[[Kiron Lenses|Kiron]] 28–70 mm f4 Macro (1:4) *[[Kiron Lenses|Kiron]] 105 mm f2.8 Macro (1:1)

===LOMO=== [[LOMO]] is a Russian photographic manufacturer, it made some lenses for the [[Almaz (camera)|Almaz]] camera on K-mount, but caution must be used as the Almaz version has some differences with the standard K-mount *Volna-10K 35 mm f1.8 *Volna 50 mm f1.8, kit lens for Almaz-103 kamera.

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

===Lensbaby=== *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=== *[[Loreo]] 35 mm f11-22 Shift lens (Lens-In-A-Cap) *[[Loreo]] 38 mm f11 3D (Stereo) '''(2006–Present)'''

===Luxon=== Luxon is a Chinese manufacturer, and there is little information available on the company or its products. *Luxon 50 mm f2.0 MC (China)

===Mir===

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

===Miranda=== Miranda was a brand name used by the Dixons group in the UK, mostly for Cosina made products. *[[Miranda Camera Company|Miranda]] 28 mm f2.8 (49 mm filter) *[[Miranda Camera Company|Miranda]] 28 mm f2.8 MC (52 mm filter) *[[Miranda Camera Company|Miranda]] 50 mm f2 (49 mm filter) *[[Miranda Camera Company|Miranda]] 70–210 mm f4 Macro (52 mm filter) *[[Miranda Camera Company|Miranda]] 70–210 mm f4.5 Macro *[[Miranda Camera Company|Miranda]] 75–200 mm f4.5-5.3 Macro (52 mm filter)

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

===Makinon=== Makinon lenses were made by Makina Optical in Japan. *Makinon MC Reflex 400m f6.7 Macro *Makinon MC Reflex 500 mm f8 Macro ([[catadioptric]]) (67 mm filter) *Makinon MC ZOOM 35–70 mm 1:2.8 (62 mm filter) *Makinon MC 135mm 1:2.8 (55 mm filter) not to be confused with the macro version. *Makinon MC 135mm 1:2.8 (52 mm filter) (non-macro version, has a built-in hood) *Makinon MC 80-200mm f4.5 Macro (62 mm filter) Manual or Auto Part #744699 *Makinon 28mm 1:2.8

===Oberon=== *Oberon-11K 200 mm f2.8

===Opteka=== *Opteka OPT500MIR-C 500mm f8

===Ozunon===

*Ozunon 35 mm-75 mm F3.5-4.5

===Panagor=== Panagor is an alternative name for Kino lenses sold in Europe: *Panagor-E PMC Auto Zoom 28 mm-80 mm F3.5-4.5

===[[Petri Camera|Petri]]=== [[Petri Camera|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: *[[Petri Camera|Petri]] 28 mm f2 *[[Petri Camera|Petri]] 40 mm f2.5 “Pancake" *[[Petri Camera|Petri]] 50 mm f2 *[[Petri Camera|Petri]] 135 mm f2.8

===Peleng=== Peleng is a lens manufacturer based in [[Belarus]], it was founded in the Soviet era and released most of its lenses for the [[M42 lens mount|M42]] mount, but it has a K-mount lens: *Peleng 8 mm f3.5 (2008)

===Pentax=== {{Main|Pentax lenses}} Bold text indicates lenses in current production/stock sale from Pentax.<ref>{{cite web|url=http://www.pentax.jp/english/imaging/digital/lens/|title=HOME - RICOH IMAGING|website=www.pentax.jp|access-date=22 April 2018}}</ref>

==== Special optics ==== *Pentax Stereo Adapter I *Pentax Stereo Adapter II

==== [[Teleconverters]] ==== *SMC Pentax Rear Converter K T6-2x *SMC Pentax Rear Converter-A 1.4x-L *SMC Pentax Rear Converter-A 2x-L *SMC Pentax Rear Converter-A 1.4x-S *SMC Pentax Rear Converter-A 2x-S *SMC Pentax-F 1.7x AF Adapter *HD Pentax-DA AF Rear Converter 1.4x AW (2014)

===Phoenix=== *Phoenix 500 mm f8 Reflex ([[catadioptric]]) (2006) *Phoenix 800 mm f8 Reflex ([[catadioptric]]) (2008)

===Polar=== Polar is a brand of Samyang Optics, a South Korean third party lens manufacturer. *Polar 800 mm f8 Reflex ([[catadioptric]]) (2008) *Polar 85 mm Portrait Lens f1.4 Aspherical IF (2008)

=== Porst === *Porst 28 mm f2.8 MC Auto *Porst 40 mm f2.5 MC Auto *Porst 55 mm f1.2 Reflex MC Auto (55 mm filter) *Porst 55 mm f1.2 MC Auto *Porst 135 mm f2.8 Tele-AS MC E (55 mm filter)<ref>{{cite web |url=http://www.frtg.de/privat/porst_automatic_tele_135mm_f28/frtg_de_porst_automatic_tele_135mm_f28.htm |title=Porst Automatik-Tele 1:2,8 135mm Objektiv ~ Bilder und Infos ( Daten, Pictures, Images, Data ) |access-date=2010-03-09 |archive-url=https://web.archive.org/web/20110603041125/http://www.frtg.de/privat/porst_automatic_tele_135mm_f28/frtg_de_porst_automatic_tele_135mm_f28.htm |archive-date=2011-06-03 }}</ref> *Porst 75–260 mm f4.5 *Porst 200 mm f3.5

=== Promaster === *Promaster 18–200 mm f3.5-6.3 AF XR EDO *Promaster 18–200 mm f3.5-6.3 AF XR EDO(2007) *Promaster 19–35 mm f3.5-4.5 AF *Promaster 24–200 mm f3.5-5.6 AF XLD ASP *Promaster 28–80 mm f3.5-5.6 AF *Promaster 28–70 mm f2.8-4.2 MC Auto ZOOM MACRO *Promaster 28–70 mm f3.9-4.8 Spectrum 7 MC Macro Auto *Promaster 28–80 mm f3.5-5.6 Spectrum 7 AF *Promaster 28–105 mm f4-5.6 AF IF *Promaster 28–200 mm f3.5-5.6 AF XR *Promaster 28–210 mm f3.5-5.6 Spectrum 7 MC Macro *Promaster 50 f1.7 *Promaster 60–300 mm f4-5.6 Spectrum 7 (67 mm filter) (2008) *Promaster 70–210 mm f4-5.6 AF Macro *Promaster 70–300 mm f4-5.6 Spectrum 7 AF EDO LD Macro (2007) *Promaster 80–200 mm f3.5 MC (62 mm filter) *Promaster 80–210 mm f4.5-5.6 AF *Promaster 85–210 mm f3.8 Auto Zoom Macro MC *Promaster 135 mm f1:2.8 MC

===Quantaray=== *Quantaray AF 100–300 mm f/4.5-6.7 LDO

===Revue=== *Revue 35 mm f2.8 *Revue 80–200 mm f4.5 *Revue 28–70 mm f3.5-4.5 *Revue 28–50 mm f3.5-4.5 *Revue 70–210 mm f4.5 AF

===Revu=== *Revu 50 mm f1.2 (1975)

===Revuenon=== * Revuenon Auto multicoated 28 mm f/2.8 * Revuenon Auto MC 28 mm f/2.8 * Revuenon Auto 45 mm f/2.8 * Revuenon Auto MC 55 mm f/1.4 * Revuenon Auto MC 55 mm f/1.7 * Revuenon 55 mm f/1.2 * Revuenon 135 mm f/2.8 * Revuenon Auto MC 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=== 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.<ref>{{cite web|url=http://www.drricoh.de/Rikenon/index.html|title=The Unofficial Guide to Ricoh SLR Cameras and Rikenon Lenses|first=Dr.|last=Ricoh|website=www.drricoh.de|access-date=22 April 2018}}</ref> *Rikenon 24 mm f2.8 (52 mm filter)XR Version *Rikenon 28 mm f2.8 (52 mm filter)XR Version *Rikenon 28 mm f3.5 (52 mm filter)XR Version (probably a renamed smc PENTAX-M 28mm f/3.5, very sharp wide-open) *Rikenon 35 mm f2.8 XR Version *Rikenon 50 mm f2 (52 mm filter)XR Version *Rikenon 50 mm f2 L (52 mm filter)XR Version *Rikenon 50 mm f2 S (52 mm filter)XR Version *Rikenon 50 mm f1.4 (52 mm filter)XR Version *Rikenon 50 mm f1.7 (52 mm filter)XR Version *Riconar 55 mm f2.2 (52 mm filter) *Rikenon 55 mm f1.2 (58 mm filter)XR Version *Rikenon 135 mm f2.8 (55 mm filter)XR Version *Rikenon 200 mm f4 XR *Rikenon 50 mm f2 (52 mm filter)P Version *Rikenon 600 mm f8 Reflex XR Version

=== Rokinon === This lens uses the Ricoh KR-mount version: *Rokinon 500 mm f6.3 Reflex ([[catadioptric]])

===Sakar=== Sakar is a commercial American company that used to sell K-mount lenses.<ref>Sakar Current Corporate website [http://www.sakar.com Sakar Corp.]</ref> *80–210 mm f1:3.8 macro MC (58 mm filter) *85–210 mm f1:4.5 macro MC *500 mm f/8 macro mirror ([[catadioptric]])

===Samyang=== Samyang is an optical manufacturer located in South Korea. Many of their lenses are also sold under the Rokinon and Bower brand names. *Samyang 8 mm f/3.5 UMC Fish-eye CS II *Samyang 10 mm f/2.8 ED AS NCS CS *Samyang 12 mm f/2.8 AS NCS Fish-eye *Samyang 14 mm f/2.8 ED S IF UMC *Samyang 16 mm f/2.0 ED AS UC CS *Samyang 20 mm f/1.8 ED AS UMC *Samyang 24 mm f/1.4 ED AS IF UMC *Samyang Tilt/Shift 24 mm f/3.5 ED AS UC *Samyang 35 mm f/1.4 AS UMC *Samyang 50 mm f/1.4 AS UMC *Samyang 85 mm f/1.4 AS IF UMC *Samyang 100 mm f/2.8 ED UMC Macro *Samyang 135 mm f/2.0 ED UMC *Samyang 100–500 mm f5.6-7.1 Macro Tele Zoom Lens

===Samsung=== All these lenses had been marketed by Samsung and present on Samsung's GX-series DSLRs. 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.<ref>[http://www.schneiderkreuznach.com/index_e.htm Schneider Kreuznach Site] {{webarchive|url=https://web.archive.org/web/20130203000238/http://www.schneiderkreuznach.com/index_e.htm |date=2013-02-03 }}</ref> 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.<ref>{{cite web|url=http://www.imaging-resource.com/EVENTS/PMAS06/1137428147.html|title=NEWS! - Samsung rebadges Pentax DSLR|first=The Imaging|last=Resource|website=www.imaging-resource.com|access-date=22 April 2018}}</ref><ref>{{cite web|url=http://www.popphoto.com/Reviews/Lenses/Lens-Test-Schneider-Kreuznach-D-Xenon-18-55mm-f-3.5-5.6-AF|title=Lens Test: Schneider-Kreuznach D-Xenon 18-55mm f/3.5-5.6 AF|website=popphoto.com|access-date=22 April 2018}}</ref> *Schneider-Kreuznach D-Xenogon 10–17 mm F3.5-4.5 ED (2007- ) (rebadged [[Pentax DA 10-17mm lens]], 2006-) *Schneider-Kreuznach D-Xenon 12–24 mm f4 ED (2007- ) (rebadged [[Pentax DA 12-24mm lens]], 2005-) *Schneider-Kreuznach D-Xenon 18–55 mm f3.5-5.6 AF (2007- ) (rebadged [[Pentax DA 18-55mm lens]], 2004- ) *Schneider-Kreuznach D-Xenogon 35 mm f2 (2006-) (rebadged [[Pentax FA 35mm lens]], 1999-) *Schneider-Kreuznach D-Xenon 50–200 mm f/4-5.6 AF (2006-) (rebadged [[Pentax DA 50-200mm lens]], 2005-) *Schneider-Kreuznach D-Xenon 100 mm MACRO 1:2.8 (2007-) (rebadged [[Pentax D FA 100mm lens]], 2004-)

===Schneider-Kreuznach=== The Schneider-Kreuznach lenses feature shift and tilt movements for perspective control; they can be shifted by 12 mm and tilted by 8 degrees simultaneously.<ref>{{cite web|title=Tilt/Shift Lenses|url=http://www.schneiderkreuznach.com/en/photo-imaging/product-field/photo-lenses/products/dslr-lenses/tiltshift-lenses/}}</ref>

* Schneider-Kreuznach PC-TS Super-Angulon 4.5/28 28mm f4.5 * Schneider-Kreuznach PC-TS Super-Angulon 2.8/50 50mm f2.8 * Schneider-Kreuznach PC-TS Makro-Symmar 4.5/90 HM 90mm f4.5

===[[Sears]]=== Sears is an American commercial company that sells [[Rebranding|rebranding]] lenses and cameras at their own stores in the United States 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]] 28 mm f/2.8 Auto MC *[[Sears]] 50 mm f/1.4 Auto MC *[[Sears]] 50 mm f/1.7 Auto MC *[[Sears]] 50 mm f/2 *[[Sears]] 50 mm f/1.7 *[[Sears]] 55 mm f/1.4 *[[Sears]] 55 mm f/2 *[[Sears]] 28–70 mm f/3.5-4.5 Macro *[[Sears]] 60–300 mm f/4-5.6 Macro (KR-mount) *[[Sears]] 75–260 mm f/4.5 MC Macro *[[Sears]] 80–200 mm f/4-5.6 Auto MC *[[Sears]] MC 135 mm f/2.8 *[[Sears]] Auto 2X Teleconverter

===[[Sigma Corporation|Sigma]]=== [[Sigma Corporation|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 [[Digital single-lens reflex camera|SLR]] it launched K-mount D series lenses. Such ones are designed to be used with the [[Active pixel sensor|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]], [[Pentax K20D|K20D]] and [[Pentax K200D|K200D]] cameras. Use of older Sigma lenses is possible but with caution, some Sigma older K-mount lenses are with the infamous [[Ricoh]] pin. [[File:Sigma back IMG 2601.JPG|125px|right|Sigma 17-70 mm lens]]

*[[Sigma Corporation|Sigma]] 8 mm f/3.5 EX DG Fisheye *[[Sigma Corporation|Sigma]] 8–16 mm f/4.5-5.6 DC HSM *[[Sigma Corporation|Sigma]] 10–20 mm f/4.0-5.6 AF EX DC *[[Sigma Corporation|Sigma]] 10–20 mm F/3.5 EX DC HSM *[[Sigma Corporation|Sigma]] 12–24 mm f/4.5-5.6 EX DG *[[Sigma Corporation|Sigma]] 14 mm f/2.8 EX DG *[[Sigma Corporation|Sigma]] 15 mm f/2.8 EX DG Fisheye *[[Sigma Corporation|Sigma]] 15–30 mm f/3.5-5.6 AF EX DG *[[Sigma Corporation|Sigma]] 17–35 mm f/2.8-4 EX ASP *[[Sigma Corporation|Sigma]] 17–50 mm f/2.8 EX DC OS HSM *[[Sigma Corporation|Sigma]] 17–70 mm f/2.8-4.5 DC Macro *[[Sigma Corporation|Sigma]] 17–70 mm f/2.8-4.5 DC Macro (2007) *[[Sigma Corporation|Sigma]] 17–70 mm f/2.8-4 DC Macro OS HSM *[[Sigma Corporation|Sigma]] 18–50 mm f/3.5-5.6 DC AF *[[Sigma Corporation|Sigma]] 18–50 mm f2.8-4.5 DC OS HSM *[[Sigma Corporation|Sigma]] 18–125 mm f/3.8-5.6 DC HSM *[[Sigma Corporation|Sigma]] 18–200 mm f/3.5-5.6 DC *[[Sigma Corporation|Sigma]] 18–250 mm f/3.5-6.3 DC OS HSM *[[Sigma Corporation|Sigma]] 20 mm f/1.8 EX DG ASP *[[Sigma Corporation|Sigma]] 20–40 mm f/2.8 EX DG ASP *[[Sigma Corporation|Sigma]] 24 mm f/1.8 EX DG *[[Sigma Corporation|Sigma]] 24–70 mm f/2.8 IF EX DG HSM *[[Sigma Corporation|Sigma]] 24–70 mm f/3.5-5.6 *[[Sigma Corporation|Sigma]] 24–135 mm f/2.8-4.5 IF ASPH AF *[[Sigma Corporation|Sigma]] 28 mm f/1.8 EX DG *[[Sigma Corporation|Sigma]] 28 mm Mini-Wide f/2.8 *[[Sigma Corporation|Sigma]] 28–70 mm f/2.8 EX DF ASP *[[Sigma Corporation|Sigma]] 28–300 mm f/3.5-6.3 DL ASP IF *[[Sigma Corporation|Sigma]] 28 mm f/1.8 EX DG *[[Sigma Corporation|Sigma]] 28–300 mm f/3.5-6.3 CHZ ASP *[[Sigma Corporation|Sigma]] 28–200 mm f/3.5-5.6 DL Macro *[[Sigma Corporation|Sigma]] 28–200 mm f/3.5-5.6 *[[Sigma Corporation|Sigma]] 28–105 mm f/2.8-4 ASP *[[Sigma Corporation|Sigma]] 28–80 mm f/2.8 EX DF ASP Macro II *[[Sigma Corporation|Sigma]] 28–80 mm f/2.8 EX DF ASP Macro *[[Sigma Corporation|Sigma]] 28–80 mm f/3.5-5.6 *[[Sigma Corporation|Sigma]] 30 mm f/1.4 EX DC *[[Sigma Corporation|Sigma]] 35–70 mm f/2.8-4 Macro 1:6.7(52 mm filter) *[[Sigma Corporation|Sigma]] 50 mm f1.4 EX DG HSM *[[Sigma Corporation|Sigma]] 50 mm f/2.8 EX DG Macro *[[Sigma Corporation|Sigma]] 50–150 mm APO f/2.8 EX DC II *[[Sigma Corporation|Sigma]] 50–200 mm f4-5.6 DC O S HSM *[[Sigma Corporation|Sigma]] 50–500 mm f/4-6.3 EX APO HSM *[[Sigma Corporation|Sigma]] 70 mm f/2.8 EX DG Macro *[[Sigma Corporation|Sigma]] 70–200 mm f/2.8 EX DG Macro *[[Sigma Corporation|Sigma]] 70–200 mm f/2.8 EX APO *[[Sigma Corporation|Sigma]] 70–200 mm f/2.8 EX DG OS HSM *[[Sigma Corporation|Sigma]] 70–200 mm f/2.8 EX DG APO Macro MkII *[[Sigma Corporation|Sigma]] 75–210 mm f/3.5-4.5 ZOOM-K III MC *[[Sigma Corporation|Sigma]] 70–300 mm f/4-5.6 DG APO Macro *[[Sigma Corporation|Sigma]] 70–300 mm f/4-5.6 DG Macro *[[Sigma Corporation|Sigma]] 70–300 mm f/4-5.6 DG OS *[[Sigma Corporation|Sigma]] 70–300 mm f/4-5.6 DI LD Macro (2008) *[[Sigma Corporation|Sigma]] 70–300 mm f/4-5.6 DL Macro *[[Sigma Corporation|Sigma]] 70–300 mm f/4-5.6 DG Macro *[[Sigma Corporation|Sigma]] 70–300 mm f/4-5.6 EX APO Macro *[[Sigma Corporation|Sigma]] 75–300 mm f4-5.6 AF *[[Sigma Corporation|Sigma]] 85 mm f/1.4 EX DG HSM *[[Sigma Corporation|Sigma]] 100–200 mm f/4.5 Macro *[[Sigma Corporation|Sigma]] 100–300 mm f/4.5-6.7 DL *[[Sigma Corporation|Sigma]] 100–300 mm f/4 EX APO IF *[[Sigma Corporation|Sigma]] 100–300 mm f/4.5-6.7 DL *[[Sigma Corporation|Sigma]] 105 mm f/2.8 EX DG Macro *[[Sigma Corporation|Sigma]] 120–400 mm f/4.5-5.6 APO DG OS HSM *[[Sigma Corporation|Sigma]] 135–400 mm f/4.5-5.6 APO ASP *[[Sigma Corporation|Sigma]] 150–500 mm f/5.0-6.3 DG OS HSM *[[Sigma Corporation|Sigma]] 170–500 mm f/5-6.3 APO ASP *[[Sigma Corporation|Sigma]] 180 mm f/3.5 EX Macro *[[Sigma Corporation|Sigma]] 300 mm f/2.8 EX DG *[[Sigma Corporation|Sigma]] 500 mm f/4 XQ Reflex ([[catadioptric]]) *[[Sigma Corporation|Sigma]] 500 mm f/4.5 EX DG *[[Sigma Corporation|Sigma]] 500 mm f/8 Reflex ([[catadioptric]]) *[[Sigma Corporation|Sigma]] 600 mm f/8 Reflex ([[catadioptric]])

=== Soligor === *[[Soligor]] 70–210 mm f/4.5 *[[Soligor]] MC 80/135 f/4 dualfocal *[[Soligor]] 85–205 mm f/3.8 *[[Soligor]] MC 90 mm-230 mm f/4.5 *[[Soligor]] 135 mm f/2.8 *[[Soligor]] 200 mm f/2.8 *[[Soligor]] 80/200 mm MC f/4.5 * [[Soligor]] C/D 28–200 mm f/3.8-5.5 Macro * [[Soligor]] 35-105/3.5 Macro

=== Spiratone === 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. *[[Spiratone]] 400 mm f6.3 *[[Spiratone]] 500 mm f8 (72 mm filter)

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

===Sunagor=== *Sunagor 75–300 mm F5.6

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

===Takumar===

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

===[[Tamron]]=== [[Image:Pentax ME Super Tamron 28-75 f28.jpg|thumb|A Tamron 28-75 mm 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]] 10–24 mm f/3.5-4.5 Di II LD AF SP Aspherical (IF) *[[Tamron]] 17–50 mm f/2.8 SP AF XR Di-II LD Aspherical IF *[[Tamron]] 18–250 mm f/3.5-6.3 AF Di-II LD Aspherical IF Macro *[[Tamron]] 18–200 mm f/3.5-6.3 XR Di-II LD IF '''(2008)''' *[[Tamron]] 24 mm f/2.5 (Adaptall 2, two versions (01BB) and (01B) *[[Tamron]] 28–75 mm f/2.8 SP AF XR Di LD Aspherical IF Macro *[[Tamron]] 28–80 mm f/3.5-5.6 AF *[[Tamron]] 28–300 mm f/3.5-6.3 XR DI LD *[[Tamron]] 70–200 mm f/2.8 SP AF *[[Tamron]] 70–300 mm f/4-5.6 DI LD Macro '''(2008)''' *[[Tamron]] 80–250 mm f/3.8-4.5 Macro (Adaptall) (QZ-825M/QZ-250M) *[[Tamron]] 90 mm f/2.8 SP Di Macro (No Adaptall version) *[[Tamron]] 90 mm f/2.5 Macro (Adaptall) *[[Tamron]] 90 mm f/2.8 SP AFDi 1:1 Macro *[[Tamron]] 300 mm f/2.8 DL (Adaptall) *[[Tamron]] 500 mm f/8 SP (Adaptall 2) Reflex ([[catadioptric]])

===Tokina=== *[[Tokina]] 17 mm f3.5 *[[Tokina]] 28 mm f2.8 *[[Tokina]] 90 mm f2.5 macro AT-X *[[Tokina]] 90 mm f2.8 macro *[[Tokina]] 200 mm f3.5 *[[Tokina]] 20–35 mm f2.8 AT-X Pro *[[Tokina]] 28–70 mm f/2.6-2.8 AT-X Pro *[[Tokina]] 28–70 mm f2.8 *[[Tokina]] 28–70 mm f3.5-4.5 PKA-mount *[[Tokina]] 28–200 mm f3.5-5.3 zoom, 72 mm filter *[[Tokina]] 35–70 mm f3.5-4.6 SZ-X - close focusing zoom and macro *[[Tokina]] 35–105 mm f3.5 RMC - close focusing zoom *[[Tokina]] 60–120 mm f2.8 AT-X (portrait lens, 55 mm filter) *[[Tokina]] 70–210 mm f4.0-5.6 (manual + AF, AF lens was also made for Vivitar) *[[Tokina]] 70–210 mm f4.5 *[[Tokina]] 75–150 mm f3.8 *[[Tokina]] 80–200 mm f2.8 *[[Tokina]] 80–200 mm f4.5-5.6 SZ-X (49 mm filter) *[[Tokina]] 80–400 mm f4.5-5.6 AT-X *[[Tokina]] 150–500 mm f5.6 AT-X SD *[[Tokina]] 500 mm 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, when the company seems to have changed its focus to video lenses. *Tou/Five Star MC Auto 28 mm 1:2.8 (to f/22) (52 mm) *Toyo/Five Star MC Auto 28 mm 1:2.8 (to f/16) (52 mm) *Tou/Five Star 28–80 mm 1:3.5-4.5 macro *Tou/Five Star 28–135 mm 1:3.5-5.2 macro (67 mm) *Tou/Five Star MC Auto 35–75 mm 1:3.5-4.8 macro (55 mm) *Tou/Five Star 70–210 mm 1:4.5-22 macro (55 mm) *Tou/Five Star 75–200 mm 1:4.5 macro *Tou/Five Star MC Auto 200 mm 1:4.5 (52 mm) *Tou/Five Star 500 mm 1:8

===[[Venus Optics]]=== *Laowa 12 mm f/2.8 Zero-D *Laowa 15 mm f4 Wide Angle Macro *Laowa 25 mm f/2.8 2.5-5X Ultra Macro *Laowa 60 mm f2.8 2X Ultra-Macro *Laowa 105 mm f/2 Smooth Trans Focus (STF)

===Vivitar=== *[[Vivitar]] 17 mm f3.5 MC Wide-Angle *[[Vivitar]] 19–35 mm f3.5-4.5 Series 1 *[[Vivitar]] 24 mm f2 *[[Vivitar]] 24 mm f2.8 *[[Vivitar]] 24–70 mm f3.3-4.8 Series 1 *[[Vivitar]] 28 mm f2 *[[Vivitar]] 28 mm f2.5 *[[Vivitar]] 28 mm f2.8 *[[Vivitar]] 28–85 mm f2.8-3.8 *[[Vivitar]] 28–90 mm f2.8-3.5 Series 1 *[[Vivitar]] 28–105 mm f2.8-3.8 Series 1 *[[Vivitar]] 35–200 mm f3-4.5 Macro 1:5 (65 mm filter) *[[Vivitar]] 35 mm f2.8 VMC (49 mm filter) *[[Vivitar]] 40 mm f2.5 VMC *[[Vivitar]] 50 mm f1.4 VMC *[[Vivitar]] 50 mm f2 (49 mm filter) *[[Vivitar]] 55 mm f1.2 VMC Series I (58 mm filter) *[[Vivitar]] 70–210 mm f3.5 Macro Zoom Series 1 & f2.8-4 Series 1<ref>{{cite web|url=http://www.robertstech.com/vivitar.htm|title=Vivitar 70-210 Series 1 Macro Zoom Lenses - Mark Roberts Photography|first=Mark|last=Roberts|website=www.robertstech.com|access-date=22 April 2018}}</ref> *[[Vivitar]] 75–200 mm f4.5 *[[Vivitar]] 85–205 mm f3.8 *[[Vivitar]] 90 mm f2.5 SL I Macro (2002-?) *[[Vivitar]] 90–180 mm f4.5 Macro *[[Vivitar]] 100–500 mm f5.6-8 (67 mm filter) Series 1 *[[Vivitar]] 105 mm f2.5 Macro Series 1 *[[Vivitar]] 135 mm f2.3 Series 1 *[[Vivitar]] 135 mm f2.8 *[[Vivitar]] 135 mm f3.5 VMC (49 mm filter) *[[Vivitar]] 200 mm f3 Series 1 (72 mm filter) *[[Vivitar]] 450 mm f4.5 Series 1 aspherical catadioptric *[[Vivitar]] 600 mm f8 Series 1 solid catadioptric *[[Vivitar]] 800 mm f11 Series 1 solid catadioptric

===Cosina Voigtländer=== *[[Cosina Voigtländer]] Color Skopar 20 mm f3.5 SL-II (2009) *Cosina Voigtländer 35–70 mm f3.5-4.8 (2004) *Cosina Voigtländer Ultron Aspherical 40 mm f2 SL-II (2008, limited) *Cosina Voigtländer Ultron Aspherical 40 mm f2 SL (2007, limited) *Cosina Voigtländer Nokton 58 mm f1.4 (2008) *Cosina Voigtländer Nokton 58 mm f1.4 SL-II (2008, SL never available for K-mount) *Cosina Voigtländer Color-Heliar 75 mm f2.5 (2002-200?) *Cosina Voigtländer Apo-Lanthar 90 mm f3.5 SL *Cosina Voigtländer Apo-Lanthar 125 mm f2.5 SL (2002–2006) *Cosina Voigtländer Apo-Lanthar 180 mm f4 SL (2002–2006)

===VOMZ=== Vologda Optical-and-Mechanical Plant. *Mir-47K 20 mm f2.5 *Oberon-11K 200 mm f2.8

===Zenitar===

[[Zenitar]]<ref>{{cite web|url=http://www.zenitcamera.com/catalog/lenseslist.html|title=ZENITcamera: Объективы Красногорского завода|last=Keng|website=www.zenitcamera.com|access-date=22 April 2018}}</ref> 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. *MC [[Zenitar]]-K 16 mm f2.8 *MC [[Zenitar]]-K 1:2.8 20 mm *MC [[Zenitar]]-K 1:2.8 28 mm *MC [[Zenitar]]-К 1:1.4 50 mm *MC [[Zenitar]]-K 1:1.9 50 mm *MC [[Zenitar]]-K2 50 mm f2 (1995-?) *MC [[Zenitar]]-1K 1:1.4 85 mm [[telephoto lens|telephoto]] *MC [[Apochromat|APO]] [[Zenitar|Telezenitar]]-K 1:2.8 135 mm [[telephoto lens|telephoto]] *MC [[Apochromat|APO]] [[Zenitar|Telezenitar]]-K 300 mm f4.5 (2008) [[telephoto lens|telephoto]] *MC [[Zenitar|Variozenitar]]-K 25–45 mm f2.8-3.5 (1980-? version)(60 mm filter) [[zoom lens|zoom]] *MC [[Zenitar|Variozenitar]]-K 25–45 mm f2.8-3.5 (2008) [[zoom lens|zoom]] *MC [[Zenitar|Variozenitar]]-K 35–100 mm f2.8 (1980?) [[zoom lens|zoom]] *MC Variozenitar-K 1:3.5-4.5 35–105 mm [[zoom lens|zoom]] *MC Variozenitar-K 1:4.0 70–210 mm [[zoom lens|zoom]]

==== Special lenses ====

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

== References == {{reflist}}

==External links== {{Commons category|K-mount}} *[http://www.pentaxforums.com/articles/photo-articles/evolution-of-pentax-k-mount.html The Evolution of the Pentax K-mount], PentaxForums *[http://kmp.pentaxians.eu/technology/k-mount/ Pentax K-mount page], KMP (former Bojidar Dimitrov) *[https://aperturepedia.com/pentax-k/ Pentax K Lens Database], Aperturepedia. A comprehensive table with detailed information on all first-party Pentax K-mount lenses *[http://www.mosphotos.com/PentaxLensesExplained.html Pentax K-Mount Lenses Explained], Mosphotos.com *[http://www.mosphotos.com/PentaxLensCompatibility.html Pentax Lens Compatibility Chart], Mosphotos.com *[http://www.pentaxforums.com/lensreviews/ Pentax Lens Review Database] and [http://www.pentaxforums.com/userreviews/ Third-Party PK-mount Lens Review Database], PentaxForums *[http://plg.komkon.org The Pentax Lens Gallery]: List of some film-era Pentax K lenses and some comparison on bokeh and flare, also selected non-Pentax ones *[http://www.ricoh-imaging.co.jp/english/support/pdf/pentax_acc.pdf Pentax DSLR lenses catalog], Pentax UK *[https://web.archive.org/web/20111220083138/http://www.pentax.co.uk/en/Photo-Lenses.html The PENTAX optical system - Magical moments captured in detail and clarity], archived Pentax lens product page *[https://web.archive.org/web/20170427015417/http://stans-photography.info/All_Lenses_Index.html Stan's Pentax Photography], Stan Halpin

[[Category:Lens mounts]] [[Category:Pentax K-mount lenses| ]] [[Category:Pentax|K-mount]] [[Category:Japanese inventions]]