12-24mm or 15mm
K20D...ist DS ,DA18/55,DA16/45.DA* 50/135,"A"1.7 50MM..."A" 70/210..M 50mm f2...Tamron 90mm macro,28/300 Tamron,200/500 Tamron 6.9....A Pentax DA*300... Sigma10/20,FA31mm 1.8 Ltd*********,FA 77mm Ltd!


Just noticed there is a Samsung 12-24 in the classified (same as Pentax 12-24) for £400 odd, a bargain IMHO.
If you want to see some sample images with the 12-24, say the word.
Davex.
K5 + 8mm-500mm zooms and primes
Please feel free to play with any images I post.
My flickr: link
If IQ or speed are a requirement for you, then I would think about the 14mm.
Kim
.........all the gear, no idea!
Me super, MX, LX, K5,DA 18-55WR, DA 17-70, DA 55-300, DA40 Ltd, FA50 1.4, Samsung D-Xenon 12-24,Samsung 100mm macro M50 1.7(x3), M28 3.5, M35 2.8, M100macro f4, M135 3.5(+others)
Simon
My website http://www.landscapephotographyuk.com
My Facebook page http://www.facebook.com/landscapephotographyuk
Find me on Google+ link
Still shooting in the dark (literally and metaphorically)...
I would go for the Sigma 10-20

I agree, better bang for buck than the 12-24mm! At 12mm it is pretty distortion free and plenty sharp. Most comparisons compare the Sigma at 10mm to the Pentax at 12mm, which is unfair! I was satisfied enough with the Sigma at 15mm to banish all thoughts of the DA15mm!
The new 8-16mm bests both lenses though, if you don't mind a bulbous front element. A while back it was available for £380 new from SRS!
[link=https://500px.com/will_brealey/[/link]

Not sure what Flossie is referring to, the 10-20 seems pretty well built to me, and the distortion is something lots of people talk about but very few can demonstrate. One of the regulars here posted the definitive shot of the peculiar distortion a while back, Daniel Bridge I think (or was it MattMatic?). It's really nothing to get worried about as it only appears at 10 and 11mm, and is really only noticeable if you have a completely flat horizon like in a seascape.
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
Simon
My website http://www.landscapephotographyuk.com
My Facebook page http://www.facebook.com/landscapephotographyuk
Find me on Google+ link

PPGlink
Pentax K-5 with 18-50mm & 50-200mm Kit Lenses, Pentax 55mm f1.4 SMC DA* SDM Lens, Pentax DA 12-24mm , Pentax DA 35mm macro, Pentax SMC FA 77mm Limited, Pentax SMC FA 43mm Ltd, Pentax SMC F 50mm, Sigma 24-70mm, Metz 58 af-2
richardhurst
Member
Just about to make a purchase and cannot decide between the Pentax 12-24mm or the 15mm ED AL. What would you guys go for??
PPGlink
Pentax K-5 with 18-50mm & 50-200mm Kit Lenses, Pentax 55mm f1.4 SMC DA* SDM Lens, Pentax DA 12-24mm , Pentax DA 35mm macro, Pentax SMC FA 77mm Limited, Pentax SMC FA 43mm Ltd, Pentax SMC F 50mm, Sigma 24-70mm, Metz 58 af-2