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10-19-2016, 06:24 AM   #1
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UWA options for K-1

So apart from obvious D FA 15-30 f2.8 and Samyang 14 f2.8, as well as the new Irix 15 f2.4, Laowa 12 f2.8 and 15 f4 macro, what else is there for ff pentax mount? I've recently just saw someone mentioning Tokina 20-35 2.8 (and the slower variable aperture one too) which I didn't know existed, and sounds like an awesome lens that is hard to find. Also seen Tamron 17-35 f2.8-4 suggested, another lens that is hard to find. I found Tokina 17 3.5 in third party reviews, looks like a nice enough lens but another "hard to find" one) Oh, and the new Samyang 20 f1.8.

I know that's plenty of choice really, and I'm starting this purely to educate myself of lenses I might've missed or didn't know existed (I was shooting mirrorless before, so a lot of glass that a dslr shooter might know I'd probably miss).

Share your knowledge)

---------- Post added 10-19-16 at 06:32 AM ----------

Just found another one - Tokina 19-35 3.5-4.5 - Vivitar Series 1 19-35mm F3.5-4.5 Lens Reviews - Vivitar Lenses - Pentax Lens Review Database
Seems like a nice lens, has anyone tried it?

10-19-2016, 06:51 AM   #2
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I've got the Sigma 12-24 DG which is astoundingly wide and remarkably rectilinear for a UWA. The 12mm end is sharper than the 24 mm end. The lens may be quite slow (f/4.5-5.6) but I've never found that to be a problem for landscapes (where I use f/8 or f/9.5) or architecture (with SR enabled, I've gone down to 1/4 to 1/2 second handheld at 12 mm inside cathedrals).

It's a big heavy lens but I never go hiking or on vacation without it.
10-19-2016, 07:12 AM   #3
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Pentax FAJ 18-35.
10-19-2016, 07:27 AM   #4
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There's also the Voigtländer Color-Skopar 20mm f/3.5, if you want something small and light.

Or if you don't care about small or light (or money), Carl Zeiss once made a ZK version of the legendary Distagon 21mm f/2.8; I just have no idea where you can find one. There's also an Distagon 18mm f/3.5 if you want to go even wider.




Disclaimer: I have never shot with any lens that wide on any system, 36x24 or not.

10-19-2016, 07:29 AM   #5
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QuoteOriginally posted by photoptimist Quote
I've got the Sigma 12-24 DG which is astoundingly wide and remarkably rectilinear for a UWA. The 12mm end is sharper than the 24 mm end. The lens may be quite slow (f/4.5-5.6) but I've never found that to be a problem for landscapes (where I use f/8 or f/9.5) or architecture (with SR enabled, I've gone down to 1/4 to 1/2 second handheld at 12 mm inside cathedrals).

It's a big heavy lens but I never go hiking or on vacation without it.
Oh it's a ff lens? I assumed it was an apsc design. I'll definitely look at it, 12mm sounds amazing for an ff sensor, widest I've ever tried was 16mm equivalent on my previous body.

---------- Post added 10-19-16 at 07:30 AM ----------

QuoteOriginally posted by Scintilla Quote
There's also the Voigtländer Color-Skopar 20mm f/3.5, if you want something small and light.

Or if you don't care about small or light (or money), Carl Zeiss once made a ZK version of the legendary Distagon 21mm f/2.8; I just have no idea where you can find one. There's also an Distagon 18mm f/3.5 if you want to go even wider.




Disclaimer: I have never shot with any lens that wide on any system, 36x24 or not.
It's definitely interesting theoretically but practically I'd probably go with something cheaper for now. But again, I do just want to learn what the options are, so thanks for bringing it up!
10-19-2016, 07:50 AM   #6
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I use the Sigma 12-24 for my K1 UWA option, and it is pretty good. No vignetting on it since it is a FF lens. Sharp too, but slow.
10-19-2016, 07:50 AM   #7
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The A 15/3.5? Maybe the rarest of them all...Especially the first version (only 100 made).
10-19-2016, 07:52 AM   #8
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QuoteOriginally posted by boriscleto Quote
The A 15/3.5? Maybe the rarest of them all...Especially the first version (only 100 made).
lol why the production was so limited? 100 copies, sounds like a collectors wet dream)

---------- Post added 10-19-16 at 07:54 AM ----------

QuoteOriginally posted by VoiceOfReason Quote
I use the Sigma 12-24 for my K1 UWA option, and it is pretty good. No vignetting on it since it is a FF lens. Sharp too, but slow.
Slow aperture doesn't bother me too much, will be using f8-16 most of the time anyway. Is distortion easy to fix? That's one thing that kind of puts me off the SY14 2.8, as I want to do some interior & real estate stuff, and that mustache distortion might be a paint to deal with in post.

---------- Post added 10-19-16 at 07:56 AM ----------

QuoteOriginally posted by UncleVanya Quote
Pentax FAJ 18-35.
Interesting option, not sure how rare it is, but price marked in the review section is very attractive.

10-19-2016, 07:58 AM   #9
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QuoteOriginally posted by awscreo Quote
lol why the production was so limited? 100 copies, sounds like a collectors wet dream)
The first version only had one aspherical element. I'm guessing it was too expensive to manufacture...

Even the second version sold less than 40 copies per year...
10-19-2016, 08:01 AM   #10
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I really like my A20/2.8 that I bought to replace my DA15 when i went FF, hard to find but small and capable.
10-19-2016, 08:14 AM   #11
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QuoteOriginally posted by awscreo Quote

Slow aperture doesn't bother me too much, will be using f8-16 most of the time anyway. Is distortion easy to fix? That's one thing that kind of puts me off the SY14 2.8, as I want to do some interior & real estate stuff, and that mustache distortion might be a paint to deal with in post.
The 12-24 gives the same field of view on the K1 as the 8-16 does on APSC. The distortion is similar, maybe even slightly less. If you use the 8-16 then the 12-24 will be very familiar.
10-19-2016, 08:14 AM   #12
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I found a Tokina 19-35 3.5-4.5 for what seems to be a reasonable price (130$) - is it a good choice for interiors/landscapes/real estate? I probably won't use it lower than f8-16 for those purposes. Anyone has any sample images?

I'll probably get myself a faster prime for astro later on - either Irix or SY14.
10-19-2016, 08:20 AM   #13
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QuoteOriginally posted by awscreo Quote
I know that's plenty of choice really, and I'm starting this purely to educate myself of lenses I might've missed or didn't know existed (I was shooting mirrorless before, so a lot of glass that a dslr shooter might know I'd probably miss).
Share your knowledge)

Look here for the current ones: https://www.pentaxforums.com/forums/169-pentax-full-frame/313830-current-pent...w-picture.html
Dont forget the three Zeiss available as Leitax.

Next year the Irix 11mm.

K 15/3.5
K 15/3.5 AL
K 17/4 Fisheye
K 18/3.5
K 20/4
M 20/4
A 15/3.5
A 16/2.8 Fisheye
A 20/2.8
F 17-28/3.5-4.5 Fisheye
FA 20-35/4 AL
FA 20/2.8
Sigma 17-35/2.8-4 EX Asp.
Sigma 17-35/2.8-4 EX DG
Voigtländer Color Skopar 20mm f/3.5 SL-II Aspherical
10-19-2016, 08:22 AM   #14
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QuoteOriginally posted by beholder3 Quote
Look here for the current ones: https://www.pentaxforums.com/forums/169-pentax-full-frame/313830-current-pent...w-picture.html
Dont forget the three Zeiss available as Leitax.

Next year the Irix 11mm.

K 15/3.5
K 15/3.5 AL
K 17/4 Fisheye
K 18/3.5
K 20/4
M 20/4
A 15/3.5
A 16/2.8 Fisheye
A 20/2.8
F 17-28/3.5-4.5 Fisheye
FA 20-35/4 AL
FA 20/2.8
Sigma 17-35/2.8-4 EX Asp.
Sigma 17-35/2.8-4 EX DG
Voigtländer Color Skopar 20mm f/3.5 SL-II Aspherical
Thanks for the list! A lot to go through)
10-19-2016, 08:24 AM   #15
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FYI, Sigma lenses with DG are full frame compatible, lenses with DC in the name are for crop sensors only
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