[ElJamoquio]

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OK, so this seems to come up every few days or so - for some reason there seems to be a thought that there's not a lot of pentax full-frame glass that you can buy off the shelf.

There's a a great thread here from falconeye about what Pentax DA lenses are suitable to be used on FF - but for now I'm going to limit this list to three (edit: four) rules:

1) The lens has to be currently manufactured in K-mount (no discontinued lenses)
2) The lens must have, at some point, been described as full frame by the manufacturer/retailer. Patents count.
3) Must be available from a 'normal' retailer. No special-order 50mm f/1.2.
4) Must be a 'normal' (wish I could come up with a better word) lens. This list is not intended to include special purpose lenses, like pinhole, mirror, etc., lenses. Those lenses are nice but auxiliary to a 'system'.
5) Added Feb 19 2013 - must not have failed tests specifically designed to see if the lens is 36x24. This was added due to recent PF tests showing the 60-250 and 560 having severe vignetting.


Pentax:

1. FA 31mm f1.8 Limited
2. FA 35mm f2.0
3. FA 43mm f1.9 Limited
4. DFA 50mm f2.8 macro
5. FA 50mm f1.4
6. DA 50mm f1.8 (caveat: described as FF by retailers and seems to perform as FF lens. Unknown if Pentax told retailers it was FF.)
7. FA 77mm f1.8 Limited
8. DFA 100mm f/2.8 macro
9. DA* 300mm f4

A Honorable mention to 35mm f2.4
B Honorable mention to 40mm f2.8, with most saying it is close to full-frame performance
C Honorable mention to 55mm f1.4
D Honorable mention to 200mm f2.8? Has this ever been described as full frame?
E Future possibility for 14-28 on roadmap . Seems unlikely if reports of patent being for APS-C are true.
F Future possibility for 24-75 on roadmap
G Future possibility for 100-400 on roadmap

2012/02/19: Possibility of 560mm removed
2012/02/19 DA* 60-250 f4 removed
Sigma
10. 15mm f2.8
11. 20mm f1.8
12. 24mm f1.8
13. 28mm f1.8
14. 35mm F/1.4 DG HSM ART
15. 50mm f1.4
16. 50mm f2.8 macro
17. 70mm f2.8 macro
18. 85mm f/1.4
19. 300mm f/2.8
20. 500mm f/4.5

21. 12-24 f/4.5-5.6
22. 24-70 f/2.8
23. 70-200 f/2.8
24. 70-300 f4-5.6 DG Macro/ 70-300 f4-5.6 APO Macro/ 70-300 f4-5.6 OS (Surely all three of these aren't still sold?)
25. 120-400 f4.5-5.6
26. 150-500 f5-6.3 DG APO OS HSM
27. 50-500 f/4.5-6.3 APO DG OS HSM

Tamron
28. 90mm f2.8Macro

29. 28-300mm f3.5-6.3
30. 28-75mm f2.8 XR Di LD-IF
31. 70-200 f2.8 'macro'
32. 70-300 f4-5.6 'Macro'

Samyang/Rokinon/Bower/Vivitar/Phoenix
33. 14mm f/2.8
34. 24mm f/1.4
35. 35mm f/1.4
36. 85mm f/1.4

Phoenix

37. 28-210 f/4.2-6.5
38. 19-35 f/3.5-4.5 (actually two, manual and autofocus)



Lensbaby
I'm not going to put these on the list. I don't know how many are actually different lenses vs. different 'packages' of the same lens. They appear to be advertised as FF.

Schneider
39. 90mm f/4.5 T/S
40. 50mm f/2.8 T/S



Zeiss/Voigtlander
Some are available but these lenses are discontinued as per Digitalis.

Toy/Pinhole Lenses:
See posts by RioRico below.


For reference, from the two major Pentax mount producers I see:

Pentax:
9 current lenses.
4 more currently described APS-C lenses work well on FF.
3 lenses on roadmap might be FF.
Primary weaknesses: Primes below 31mm, mid-range zoom (assuming the 24-75-ish lens on roadmap is not FF), wide angle zoom (assuming the 14-28-ish lens on roadmap is not FF, )telephoto zoom. No primes between 100 and 200. Nothing above 300.


Sigma: 17 current lenses
Primary weaknesses: No primes between 85 and 300. Nothing above 500.



Edit 8/22/2014: Removed Sigma / 70-300 f4-5.6 APO Macro/ 70-300 f4-5.6 OS. Added Sigma 35mm F/1.4.

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Last edited by ElJamoquio; 08-22-2014 at 02:50 PM.

[Adam]

You missed the Pentax Wide Angle 35mm f/2.0 SMCP-FA AL Autofocus Lens 22190 B&H - it's still in production. Also, the DA 40mm is supports full-frame (though it has never been described as such by Pentax, as per your criteria).

[Digitalis]

I see three at Adorama (25, 28, 50) and five at BH (25, 28, 35, 50, 85) but these are discontinued, correct?

correct - Also voigtlander has stopped production of K mount lenses as well, though there should be a few of them floating around on the second hand market.

[ElJamoquio]

Thanks to you both. I updated the list.

[Adam]

BTW, here is the current FF lenses page in the lens database:
FF Lenses - Pentax Lens Reviews & Lens Database

[lytrytyr]

The list looks longer than it really is, because the Bower and Vivitar lenses are just rebadged versions of the Rokinons (better: Samyang).

[Digitalis]

The problem with pentax having no current FF lenses wider than the FA31 is that the FA31 is a really hard act to follow up on, it is a phenomenal lens.

[ElJamoquio]

The list looks longer than it really is, because the Bower and Vivitar lenses are just rebadged versions of the Rokinons (better: Samyang).

I didn't know that they were the same lens. I've changed the list. Are any of samyang's lenses current? All I can find now is a 8.5mm - I don't know if it's FF - and a 500mm mirror lens that I wasn't planning on listing.

[lytrytyr]

Are any of samyang's lenses current?

They should all be current.

All I can find now is a 8.5mm - I don't know if it's FF

According to Photozone (Samyang 8mm f/3.5 Fisheye (Canon EOS) - Review / Test Report):
"The Samyang 8mm f/3.5 is a dedicated full frame fisheye lens for APS-C DSLRs. You can also mount it to a full format (35mm) DSLR but the build-in lens hood will be visible in the image field in this case."

[ElJamoquio]

They should all be current.

I should've referred to the brand of Samyang. When I search I get either the 8.5 or the 500. I thought there's been a 85 "samyang" (now I'm doubting myself, perhaps they're all branded as Rokinon?).

"The Samyang 8mm f/3.5 is a dedicated full frame fisheye lens for APS-C DSLRs. You can also mount it to a full format (35mm) DSLR but the build-in lens hood will be visible in the image field in this case."

Thanks, I'll leave it off the list.

[Cannikin]

7. 100mm f/2.8 macro
...

No primes between 77 and 200.

Forgetting something in your own post?

[lytrytyr]

I was referring to the brand. When I search I get either the 8.5 or the 500. I thought there's been a 85 (now I'm doubting myself, perhaps they're all branded as Rokinon?).

It may depend on the market. Amazon US has Rokinon,
while Amazon UK has Samyang:
Amazon.co.uk: samyang lens

[ElJamoquio]

Forgetting something in your own post?

Whoops! I even own that lens. Fixed.

[Blue]

The problem with pentax having no current FF lenses wider than the FA31 is that the FA31 is a really hard act to follow up on, it is a phenomenal lens.

How difficult would it be to get the FA 28/2.8 as well as the FA 20/2.8 cranked back up?

[RioRico]

Are other oddments and toys. Let's see, what can I dig up on my ultra-slow net link and ancient mini-laptop...

Ok, from Loreo in PK mount are:

* Loreo 3D Lens-In-A-Cap
* Loreo 3D Macro Lens-In-A-Cap
* Loreo 35/5.6-64 Lens-In-A-Cap (for dust-free near-pinhole at f/64 -- I might get one)
* Loreo 35/11-22 PC Lens-In-A-Cap (perspective-control shift lens -- I have this one with me)

From PinholeEdun are pinhole and zone-plate 'optics' in PK, M42, Pentax 645 and 67 mounts. NOTE: I hate my PK PinholeEdun, the dust monster.

From Holga in PK mount are:

* Holga 60/8 Lens - HL-P (I'm tempted)
* Holga ~45/180 pinhole lens - HPL-P

All these are listed as FF items, all are in production, all meet your criteria. (And I've skipped the LensBabies.)