We all know there is a ton of great FF glass available on the used market that will work great with the K-1.

However, which are the currently available FF lenses (in current catalogues of lens manufacturers) that can be used with the K-1?

Below is a list that started with an initial compilation I did and then attracted a number of later additions by several contributors. There may be still some missing and please post to this thread with information about the lens (but please make sure the lens is in production). I'll then add it to the list.

If you have used any of the listed lenses on the K-1 and find that they do not perform like a proper FF lens, please post to this thread as well. There are some DA (APS-C) lenses included which have been tested as "good for FF" on film cameras but due to differences between film and digital sensors, there may be a few surprises (although I tried to be conservative and only included those that would be true surprises if they failed the "K-1 test".)

Thanks in advance.

P.S.: I realise that there is also another current FF lenses overview but the latter contains discontinued lenses and I think there is value in maintaining a list of lenses that can be bought brand new. Not everyone is prepared to go hunting on the used market. A very nice feature of the aforementioned alternative compilation is that many third-party FF lenses can found organised in roadmap-style charts.

Regarding the suitability of certain DA (APS-C) lenses, I included a few that a truly FF capable based on their design and user reports. There is a far larger number of DA lenses with OK to marginal performance on an FF camera. These have not been included in this list, even though some users may find them acceptable (in particular using the K-1's 1:1 crop mode). A useful resource on the performance of DA lenses on an FF camera is falconeye's "DA lenses on Full Frame: Test shots" thread.

Pentax
Zooms
HD Pentax-D FA 15-30mm F2.8 ED SDM WR
HD Pentax-D FA 24-70mm F2.8 ED SDM WR
HD Pentax-D FA 28-105mm F3.5-5.6 ED DC WR
HD Pentax-D FA* 70-200mm F2.8 ED DC AW
HD Pentax-D FA 70-210 mm f/4 ED SDM WR
HD Pentax-D FA 150-450mm F4.5-5.6 ED DC AW

SMC Pentax-DA* 60-250mm F4 ED [IF] SDM
(some vignetting in particular at 250 but very usable;
some owners replace an internal baffle to reduce the vignetting)

Primes
HD Pentax-D FA 21mm f/2.4 ED Limited DC WR
HD Pentax-FA 31mm f/1.8 Limited
HD Pentax-FA 43mm f/1.9 Limited
HD Pentax-FA 77mm f/1.8 Limited


HD Pentax-FA 35 mm f/2
SMC Pentax-FA 50mm F1.4

HD Pentax-D FA* 50mm F1.4 SDM AW
HD Pentax-D FA* 85mm F1.4 SDM AW

SMC Pentax-D FA 50mm F2.8 Macro
SMC Pentax-D FA 100mm F2.8 Macro WR

APS-C Primes, performing well on FF
SMC Pentax-DA 35mm F2.4 AL
SMC Pentax-DA 50mm F1.8
SMC Pentax-DA* 55mm F1.4 SDM
SMC Pentax-DA* 200mm F2.8 ED [IF] SDM
SMC Pentax-DA* 300mm F4 ED [IF] SDM
HD Pentax-DA 560mm F5.6 ED AW


Sigma (as long as current stock lasts)
Zooms
70-300mm F4-5.6 APO DG Macro
70-300mm F4-5.6 DG Macro
50-500mm F4.5-6.3 APO DG OS HSM

Primes
15mm F2.8 EX DG Diagonal Fisheye
28mm F1.8 EX DG ASP RF
35mm F1.4 DG HSM | A
85mm F1.4 EX DG HSM
300mm F2.8 EX APO DG (HSM)*
500mm F4.5 EX DG APO (HSM)*



Tamron
Zooms
SP AF 28-75mm f/2.8 XR Di LD Aspherical [IF] Macro
AF 70-300mm f/4-5.6 Di LD Macro 1:2


Samyang
Primes
12mm F2.8 ED AS NCS Fisheye
14mm F2.8 ED AS IF UMC
20mm F1.8 ED AS UMC
24mm F1.4 ED AS IF UMC
24mm F3.5 ED AS UMC TILT/SHIFT
35mm F1.4 AS UMC
50mm F1.4 AS UMC
85mm f/1.4 AS IF UMC
100mm f/2.8 Macro
135mm f/2 ED UMC
(Most, if not all, of the above are also available as "Cine" lenses that for instance feature click-less apertures.)

500mm MC f/6.3 Mirror (best Samyang mirror lens, decent sharpness but awful bokeh)
500mm MC IF f/8 Mirror
800mm MC f/8 Mirror
500mm MC f/8 Preset (not mirror, a little bit long but very light with decent sharpness)
650-1300mm f/8-f/16 (long and light, almost usefull as a monopod)
(The above comments come courtesy of banep, thanks!)


Schneider-Kreuznach
Primes
PC-TS 4.5/28MM Super-Angulon Tilt/Shift
PC-TS 2.8/50MM Super-Angulon Tilt/Shift
PC-TS 4.5/90MM Makro Symmar Tilt/Shift


Laowa (Venus Optics)
Primes
12mm f/2.8 Zero-D
15mm f/4.5 Zero-D Shift
15mm f/4.5R Zero-D Shift
15mm f/4 1:1 Macro
20mm f/4 Zero-D Shift
25mm f/2.8 Ultra Macro (2.5-5 x magnification, no infinity focus)
60mm f/2.8 2:1 Macro (2x life size magnification)
100mm f/2.8 2x Ultra Macro APO
105mm f/2 (t/3.2) STF (Smooth Transition Focus)

Irix
Primes
Irix 15mm f/2.4
Irix 11mm f/4
Irix 21mm f/1.4 Dragonfly
Irix 30mm f/1.4 Dragonfly
Irix 45mm f/1.4
Irix 150mm f/2.8 Macro 1:1 (Dragonfly)

AraxFoto
Arax 35mm f/2.8 Tilt & Shift
Arax 80mm f/2.8 Tilt & Shift

Meyer-Optik Görlitz (liquidated in 2018, but revived in 2020)
Primes

Lydith 30mm f/3.5
Trioplan 35+ f/2.8
Nocturnus 50 mm f/0.95 (DSLR variant)
Primotar X 50mm f/2.8
Trioplan 50mm f/2.9
Primoplan 58mm f/1.9
Primoplan 75mm f/1.9
P75 II (advanced version of the Primoplan 75)
Somnium II 85mm f/1.5

Lydith 30 f3.5 II
Trioplan 35mm f/2.8 II
Trioplan 50 f/2.8 II
Biotar 58mm f/1.5 II
Biotar 75mm f/1.5 II
Primoplan 58mm f/1.9 II
Primoplan 75mm f/1.9 II
Trioplan 100 f2.8 II


Apo-Makro-Plasmat 105mm f/2.7

net SE (-> resurrection of Meyer-Optik Görlitz, Emil Busch and Oprema Jena lenses, liquidated in 2018)
C. P. Goerz Citograph 50mm f/2.8 (currently a Kickstarter project)
Emil Busch Glaukar Anastigmat 97mm f/3.1 (scaled version of the 1910 Glaukar 210mm f/3.1, a lens for 8x10cm and 13x18cm field cameras)
Oprema Jena Biotar 75mm f/1.5 (re-edition of the Carl Zeiss Biotar 75mm f/1.5 (Willy Merté, 1938))


Zeiss (M42 mount lenses; require an M42 -> K-mount adapter, the genuine Pentax adapter supports infinity focus)
ZEISS Distagon T* 2,8/25
ZEISS Distagon T* 2/28
ZEISS Distagon T* 2/35
ZEISS Planar T* 1.4/50
ZEISS Planar T* 1.4/85

Zhong Yi Optics
Primes
Mitakon 20mm f/2 4.5x Super Macro
Mitakon Creator 35mm f/2
Mitakon 85mm F1.2
Mitakon 85mm F2
Mitakon Creator 85mm f/2.8 1-5x Super Macro
Mitakon Creator 135mm f/2.8 version II
Mitakon Speedmaster 135mm F1.4


Lensbaby (as long as stock is available, K-mount discontinued in 2019)
Primes
Burnside 35 (with variable vignetting)
Velvet 28
Sol 45
Velvet 56
Twist 60
Velvet 85
Optic Swap System


Dongzheng Optics
Primes
Kerlee 35 mm f/1.2 (info)

Lomography
Primes
Naiad 15mm F3.5 Art (135° FOV, 1cm close focusing)
Lomogon 2.5/32 Art Lens
Daguerreotype Achromat 64mm f/2.9 Art (info)
Neptune Convertible Art Lens System

Kenko
Primes
Kenko 400mm f/8 N II S (via T-mount adapter)

KMZ (sometimes difficult to buy outside Russia; some are easily available though)
Primes
MC Zenitar-K 16mm f/2.8 (fisheye)

MC Helios 77K-4 50mm f/1.8
MC Zenitar-K 50mm f/1.9
MC Zenitar-K 50mm f/2
MC Helios 44K-4 58mm f/2

MC Apo Telezenitar-K 135mm f/2.8
MC Apo Telezenitar-K 300mm f/4.5

Zooms
MC Variozenitar-K 25-45mm f/2.8-3.5

[baro-nite]

I looked at the mounts in which the "Optic Swap" system is available and they don't include the K-mount. Where did you see support for it?

COLLECTION - Lensbaby

and

https://lensbaby.com/collections/collection?_=pf&pf_t_filter_by_type=lens&pf...unt=Pentax%20K

[Fenwoodian]

One more:

.
The new MOG lenses are GARBAGE! I own one and it fell apart while being used last year - a total loss. Cheapest design and components I've seen in any lens.

If you want MOG soap bubble bokeh buy one of the vintage ones (I've got 4 or 5 of them and they're much better than the new versions).

[Mistral75]

.
The new MOG lenses are GARBAGE! I own one and it fell apart while being used last year - a total loss. Cheapest design and components I've seen in any lens.

If you want MOG soap bubble bokeh buy one of the vintage ones (I've got 4 or 5 of them and they're much better than the new versions).

Being used last year, yours is from the net SE era, when the notorious couple behind net SE (Stefan and Regina Immes, he was the CEO of the now liquidated net SE and she still is the CEO of B&F Oberwerth GmbH -the camera bags) organised a Ponzi scheme based on Kickstarter and Indiegogo campaigns.

OPC Optics bought the rights to the Meyer Optik Görlitz trademark from the Immes family holding, SEMI Verwaltung, two years ago. They are slowly putting revamped lenses on the market with redesigned mechanics and sometimes optics:

• Trioplan 100mm f/2.8 II in April this year
• Lydith 30mm f3.5 II in August
• Trioplan 50mm f/2.8 II in September
• Primoplan 75mm f/1.9 II, announced in November and available in January 2021
• Primoplan 58mm f/1.9 II (announcement scheduled for mid of January).

[Mistral75]

One more: Venus Optics Laowa 15mm f/4.5 Zero-D Shift.

Laowa 15mm f/4.5 Zero-D Shift - LAOWA Camera Lenses

[Class A]

One more: Venus Optics Laowa 15mm f/4.5 Zero-D Shift.

Thanks, added.

[Clinton]

I dont know how many of the Mitakon lenses are available now. If you look for Mitakon Speedmaster 135mm F1.4 it's long gone.

[Class A]

I dont know how many of the Mitakon lenses are available now. If you look for Mitakon Speedmaster 135mm F1.4 it's long gone.

Thanks, I removed that one.

Don't know about the others.

Not sure whether it still makes sense to maintain this list. It served its original intent -- to demonstrate that there is a lot of choice -- better when big players like Sigma where still making K-mount lenses.

[pres589]

I went looking and that Kerlee 35 f1.2 seems unavailable now as well.

[Lancewielder]

FYI - a large number of those KMZ lenses are vaporware and never entered mass production due to the fall of the Soviet Union. As far as I'm aware, only the 16mm f/2.8 fisheye is still sold new.


Primes
MC Zenitar-K 16mm f/2.8 fisheye
MC Helios 77K-4 50mm f/1.8
MC Zenitar-K 50mm f/1.9
MC Zenitar-K 50mm f/2
MC Helios 44K-4 58mm f/2

MC Apo Telezenitar-K 135mm f/2.8
MC Apo Telezenitar-K 300mm f/4.5

Zooms
MC Variozenitar-K 25-45mm f/2.8-3.5



As far as I'm aware, these are the only lenses that made it to mass production. The rest only existed as prototypes, sadly.

[Class A]

As far as I'm aware, these are the only lenses that made it to mass production.

Thanks, I've removed the others.

[Mistral75]

One more: Meyer Optik Görlitz Biotar 58mm f/1.5 II.

Meyer Optik Görlitz - Biotar 58 f1.5 II available! | News | Meyer Optik Görlitz lenses - Tradition meets innovation

[Mistral75]

One more: Meyer Optik Görlitz Biotar 75mm f/1.5 II.

Meyer Optik Görlitz - Biotar 75 f1.5 II available! | News | Meyer Optik Görlitz - Unique lenses with character

Biotar 75 f1.5 II | Meyer Optik Görlitz - Unique lenses with character

[Class A]

One more: Meyer Optik Görlitz Biotar 75mm f/1.5 II.

Added, thanks.