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

[Mistral75]

Thanks!

Thanks again. I've seen all variants (including "net SE group") but I think "net SE" makes the most sense.

You're welcome. I would say it's "net SE" if you're making a reference to the company itself and "the net SE group" if you're making a reference to the whole group.

[aslyfox]

. . .These lenses are really versions of the ancient M40 f2.8, that was designed for 35mm film, and was valued for being a pancake, and it was understood that pancakes compromise performance in many areas - including CA and distortion - compared to much larger lenses. My DA40 SX is so small it's been mistaken by other shooters as a lens cap. If I find it's on my K-1, I shrug my shoulders and take the shot:

IMHO, always best to proceed if you don't have time to change out equipment

my thought:

if I try, I might be successful, if I don't I know I won't have a chance in in getting a photo

_________________________________________

I'm not sure but I think

design always incorporates compromise of one sort or another

in any created object I can think of

personally speaking I didn't buy the DA 40mm 2.8 XS to use on a full frame camera

( which is good because I don't own a FF camera and don't intend on investing in one )

[angerdan]

Booth shots are taken in FF mode at open aperture:
PENTAX K-1 Laboratory | PENTAX K-1 Special site | RICOH IMAGING
http://k-1-lab.com/en/da/smc-pentax-da-40mm-f28-xs/10951.html

[Class A]

Fascinating that *none* of Class A, Fikkser or Falconeye have a DA40 SX.

Well, falconeye must have had one as he took test shots on film with it.

It doesn't matter, anyhow, as one does not need to own the lens. All one needs are eyes and pictures taken with the lens (doesn't matter who took the pictures).

The claim that if something is not FF if the far corners are less sharp or have light fall-off wide open mean that you need to take the FA31 off your list immediately, it's -2eV.

No claim has been made that a lens must not be less sharp in the far corners.
Every lens, without exception, is weaker in the corners.

We are talking about acceptable and normal (for FF lenses) levels of decreased sharpness.

Light fall off has not been a subject at all, in this discussion. BTW, many FF lenses have significant light fall off towards the corners. This is a) not a criterion for deciding in favour of APS-C vs FF lens type when facing normal FF lens fall off levels, and b) easy to fix (unlike a severe decrease in sharpness, as exposed by the DA 40/2.8).

So no, the FA 31/1.8 is not in danger of loosing its FF lens status.

A brick wall test of the related DA 40 Limited wide open is here:

Thanks, but I see the same issues confirmed (as far as the low resolution image allows).

These lenses are really versions of the ancient M40 f2.8, that was designed for 35mm film, and was valued for being a pancake, and it was understood that pancakes compromise performance in many areas - including CA and distortion - compared to much larger lenses.

That may or may not be so. The point is that the DA 40/2.8 has been labelled a "DA", i.e., as an APS-C lens, and performs fine as such. A lens, whether APS-C designated or not, can be considered to be useful on FF when it maintains its APS-C performance on FF. Anything else would violate reasonable expectations.

However, when one uses the DA 40/2.8 on FF, it loses its otherwise fine performance standard. We could accept the DA 40/2.8 as a "toy" lens into the FF category, but it is not sold as a "toy" lens or any other speciality lens (lens baby, soft-focus, etc.).

Once Ricoh starts selling the DA 40/2.8 as a "toy"/"fun" lens to be used on FF, we can accept it as such, with a respective designation. To accept the lens as is, by making excuses that its predecessor was never meant to be a stellar lens, is not a convincing approach, AFAIC.

[BruceBanner]

K-1 + DA 40mm XS owner here, I would absolutely consider it FF compatible especially in a 'real world' world sense where a 10% crop might actually happen anyway for framing purposes, or the user adding vignetting as part of PP. I've seen non compatible ASP-C lenses on my K-1, they are darn right obvious, the DA 50mm 1.8 and DA 40mm XS are exceptions so it seems.

I take nice pics, I'm not a 'pro pro' photographer, but if yer slapping glass on the camera and it looks fine and you really can't tell a difference between the edges of a 40mm XS and a FA 50mm then either yer a bad photographer (likely lol) or it's just so close to call, hardly worth mentioning and becomes 'nit picking'.

I find Class A's view probably does more harm than good, in reality many of us with K-1's take nice pictures with it on (in FF mode), ergo it's FF compatible. Other sites consider it FF compatible, and they show acceptable images uncropped to support this. It comes down to 'acceptable image' and in this regard I would be +1 for DA 40mm XS being FF compatible.

[aslyfox]

oh boy

methinks that

little old moi

started something here

20 posts and counting ?

discussing the matter

[Class A]

I find Class A's view probably does more harm than good, ...

What exactly is the harm?

Is it a problem that the list only features roughly 100 lenses and not roughly 101?
I don't think that the addition of a single lens (or even a couple more, if you consider the DA70/2.4, etc.) would make a difference to the argument that there is a very reasonable amount of FF lenses for the K-1 to choose from.

The "good" is, however, that I avoid the harm that could result in admitting just one lens that only offers compromised performance on the K-1. The backlash by critics of the K-1/K-mount no doubt will be: "No wonder they can claim that there are ~100 lenses for the K-1, if they include APS-C lenses which do not really cut the mustard on close inspection. Perhaps Pentaxians don't hold much regard for quality?".

I agree that someone who doesn't mind the shortcomings of the DA 40/2.8 XS may be better served if the list contained it, but the list is about "FF lenses", not about "APS-C lenses that still somewhat work on FF". Anyone is welcome to maintain a list of "APS-C lenses that kinda work on FF". I personally wouldn't want to mislead anyone into believing that the DA 40/2.8 and some other APS-C lenses, are perfectly good to use on FF. Arguments like "one often crops away the corners anyhow" are not acceptable. If anyone bought a copy of FA 31/1.8 which shows as weak corner performance as the DA 40/2.8 XS, they would return the lens and not "shrug their shoulders", "crop the corners", or point to samples where the deficits cannot be seen or do not occur as much due to stopping down.

[BruceBanner]

DA 50mm 1.8 is on the list, DA 40mm XS is in the same league. There are multiple sites outside of PF that claim the XS is FF compatible (in FF mode), we have multiple users of K-1's with XS's that also say the same. I don't see corners or edges compromised more than any other FF lens I own.
Anyway, all good, at the end of the day it's healthy to have differences of opinions. I just see this thread as a list of lenses that work completely fine and acceptable in FF mode on a K-1, rather than what was manufactured and intended for.
At the end of the day anyone researching and stumbling across this thread will see the difference in opinions and make their own minds up, personally I think the DA 40mm XS should make this list but it's your thread. No worries.

[aslyfox]

and despite the difference of opinion

thanks for putting the list together and starting the thread

______________________

" Bonus Points " are awarded to the OP and those who have contributed to add to the knowledge available here at the Forum

Remember that " Bonus Points " are useable world wide to help you obtain, free, the beverage of your choice at your favorite café when accompanied by adequate amount of local $

there has been a few scattered reports that certain cafes have been prevented by law or local regulation from acknowledging, publicly, participation in the program but trust me, all do.

[Heebie]

The Samyang f3.5 24mm Tilt/Shift lens can be had for £500 sterling plus £8.00 shipping in UK/Ireland, and probably a bit of Europe, from a seller on Amazon called DSLR GEAR UK.
I believe the same vendor is also selling it on eBay at a very slightly different price. (I think slightly more, but with free shipping to some places.)

It generally goes for quite a it more on amazon.co.uk. There are other sellers with higher prices.

[Class A]

The Samyang f3.5 24mm Tilt/Shift lens can be had for £500 sterling...

Thank you. This lens was already part of the list, though (listed as "24mm F3.5 ED AS UMC TILT/SHIFT").

[monochrome]

[URL="https://ricehigh....... ]

We don’t link RiceHigh on PentaxForums.

.:

[BruceBanner]

We don’t link RiceHigh on PentaxForums.

.:

Haha spill the beans... what's the story?

[Parallax]

We don’t link RiceHigh on PentaxForums.

.:

Right!

Haha spill the beans... what's the story?

He's a forum member and an anti-Pentax troll.

[Blue]

Right!

He's a forum member and an anti-Pentax troll.

RiceLow is an Uber anti-Pentax Troll.