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FF lenses for the K-1 that can be bought new
Posted By: Class A, 02-20-2016, 07:36 AM

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 my initial list (including some later additions). I'm sure there are 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.

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 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
SMC Pentax-FA 31mm F1.8 AL Limited
SMC Pentax-FA 43mm F1.9 Limited
SMC Pentax-FA 77mm F1.8 Limited

SMC Pentax-FA 35mm f/2.0 AL
SMC Pentax-FA 50mm F1.4

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

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
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 Macro
SP AF 70-200mm f/2.8 Di LD Macro
AF 28-300mm f/3.5-6.3 XR Di LD Aspherical Macro
AF 70-300mm f/4-5.6 Di LD Aspherical Macro

Primes
SP AF 90mm f/2.8 Di Macro

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 1:1 Macro
60mm f/2.8 2:1 Macro
105mm f/2 (t/3.2) STF (Smooth Transition Focus)

Irix
Primes
Irix 15mm f/2.4
Irix 11mm f/4 (tentative release date: early 2017)
Irix 45mm f/1.4 (tentative release date: 2017)

Meyer-Optik Görlitz
Primes
Lydith 30mm f/3.5
Trioplan 35+ 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)
Trioplan 100mm f/2.8

SE group (-> resurrection of Meyer-Optik Görlitz)
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))

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 135mm f/2.8 version II
Mitakon Speedmaster 135mm F1.4

Lensbaby
Primes
Velvet 56
Velvet 85

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

Lomography
Primes
Daguerreotype Achromat 64mm f/2.9 Art (info)

Kenko Tokina
Primes
Kenko Tokina 400 mm f/8 N II mirror lens (T-mount with K-mount adapter included).

KMZ (sometimes difficult to buy outside Russia; some are easily available though)
Primes
MC Zenitar-K 16mm f/2.8 fisheye
MC Zenitar-K 20mm f/2.8
MC Zenitar-K 28mm f/2.8
MC Zenitar-K 50mm f/1.4
MC Zenitar-K 50mm f/1.9
MC Zenitar-K 50mm f/2
MC Zenitar-1K 85mm f/1.4
Helios-40-2 85mm f/1.5
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
MC Variozenitar-K 35-70mm f/3.2-4.5
MC Variozenitar-K 35-105mm f/3.5-4.5
MC Variozenitar-K 70-210mm f/4

Last edited by Class A; 4 Days Ago at 04:05 AM.
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07-02-2017, 10:51 AM - 1 Like   #61
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QuoteOriginally posted by Kunzite Quote
The DA 560mm is officially a FF lens. Do you have any proof that it's not decent at the frame edge?
I have proof that is vignettes less than a Sigma 35 Art. Probably someone need to tell Sigma that by a little forist's opinion the Sigma 35 is not a full frame lens.
And a dozen of other lenses as well. It's just a matter of subjective "definition".

How does a mathematician catch an elephant using a phone booth? He just steps into the booth and defines the part beyond the door as "inside". Done.

07-02-2017, 12:21 PM   #62
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QuoteOriginally posted by zapp Quote
DA*60-250 may work if you come from ASPC and need glass to go with.
DA 60-250 does not work on K-1 un-modified, IMHO. There is a distinct vignette. Not a little vignetting in the corner which is common with many lenses but an actual circle. However, by removing the baffle mentioned by Na Horuk it becomes completely FF with no noticeable vignette. I have done so and it works very well.

Here is the thread on this if anyone is interested: DA* 60-250 mod for FF - PentaxForums.com and here: DA 60-250 replacement baffle - PentaxForums.com
07-02-2017, 02:39 PM   #63
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QuoteOriginally posted by zapp Quote
Counting lenses with "bit of vignetting" does not qualify in my opinion. DA*55, DA*60-250 and DA560
Others have posted about the 60-250 and 560, I can talk about the DA*55.

According to Photozone, IIRC, it vignettes less than the FA50 f1.4. It is physically a bigger and heavier lens, with a 58mm filter size.

I think you need to appreciate that all 35mm lenses vignette, you just didn't notice it on APS-C.

Lightroom makes it a non-issue IMHO even for lenses shot wide open at infinity.

Check Falco's thread, where your fellow forum members have collected data and samples in this topic since *2008*.

Summary: There are not many DA primes that don't work. While there aren't many zooms that do work, even then some are fine at the long end, like the DA55-300 and DA12-24.

Last edited by clackers; 07-02-2017 at 02:51 PM.
08-17-2017, 02:27 PM - 1 Like   #64
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@Class A: two more manual lenses in K mount, both emanating from the net SE group, the firm which is also behind the resurrection of Meyer Optik Görlitz:

1/ 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

Beautiful 1910 Emil Busch Glaukar 3.1 Anastigmat Lens Return by Emil Busch Rathenow, Inc. ? Kickstarter

2/ Oprema Jena Biotar 75mm f/1.5 - re-edition of the Carl Zeiss Biotar 75mm f/1.5 ((Willy Merté, 1938)

The Rising: all-star team returns legendary Biotar 75/f1.5 by Oprema ? Kickstarter

08-22-2017, 08:19 AM - 1 Like   #65
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I rented the Samyang (or Rokinon) 16mm F2.0 ED AS UMC CS lens, but it had heavy vignetting on full frame. The lens rental company stated it was FF compatible, but refunded my money when they realized that it was APS-C only. You might want to remove that one from this FF list, unless there's a version 2 that is FF compatible that I don't know about.
08-23-2017, 02:38 AM - 1 Like   #66
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Indeed, CS means "Crop Sensor" in Samyang's terminology and the corresponding lenses are APS-C only.
08-23-2017, 08:58 AM   #67
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QuoteOriginally posted by sglime Quote
You might want to remove that one from this FF list, unless there's a version 2 that is FF compatible that I don't know about.
I will, as soon as Adam has released the post for editing. It has been locked due to age.

Thanks for the feedback and thanks to Mistral75 for the explanation of the terminology.
09-08-2017, 05:53 AM - 1 Like   #68
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One more (not the most interesting of the bunch): Kenko Tokina 400 mm f/8 N II mirror lens.

???????????????????? 400mm F8 N II???????? | ????? | ????????? (today's announcement)

?????? 400mm F8 N II | ????????? (product page with specifications)

- 6 elements in 2 groups
- manual focus
- minimum focusing distance: 1.15m
- maximum magnification: 0.4x
- filter diameter: 67mm (front) / 30.5mm (rear)
- no coupling with the camera body
- available in SLR mounts (Canon EF, Nikon F, Pentax K and Sony A) and mirrorless mounts (Canon EF-M, Fujifilm X, µ4/3, Nikon 1 and Sony E); in practice the lens has a T mount and Kenko Tokina supplies it with the factory-installed adapter corresponding to the mount chosen
- length: ca. 80mm for SLR mounts and ca. 110mm for mirrorless mounts
- maximum diameter: 74mm
- weight: ca. 500g for SLR mounts and ca. 550g for mirrorless mounts
- release date: 15 September 2017
- price: ca. Ą22.000 in Japan (ca. $200).



(click to enlarge)

09-09-2017, 02:22 AM   #69
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QuoteOriginally posted by Mistral75 Quote
One more (not the most interesting of the bunch): Kenko Tokina 400 mm f/8 N II mirror lens.
Thanks!
11-15-2017, 08:57 PM   #70
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Just added the Mitakon Speedmaster 135mm F1.4.
11-26-2017, 11:44 AM   #71
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I just acquired a DA 40mm 2.8 XS, it appears to be fullframe, no vignetting (or at least not much that I can notice, I do tend to shoot center weighted often).
12-06-2017, 10:48 AM - 1 Like   #72
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One more: Meyer-Optik Görlitz P75 II

Return the lost treasure: Create the P 75 II f1.9 | Indiegogo

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