Ultra wide zooms for Pentax/Samsug

[deudeu]

I am looking for an Ultra wide zoom on my GX-10. I have found some review of two lens that seam okay: Pentax DA 12-24mm f/4, and Sigma AF 10-20mm f/4-5.6. Is there any other lens on the market i should consider?
Does anyone have experience with any of those two lenses?
Pros & Cons, recommendations, sample shots would all be appreciated!
Thank you!

 

[Stratman]

I don't have either one, but I have heard good things about both of them. I do know the Pentax is quite a bit more expensive than the Sigma though. But I would imagine the IQ on the Pentax is a little better too.

 

[deudeu]

Yeah! $200 difference, I don't know if it is worth it. Plus i like the fact that the sigma starts at 10mm... Thank you stratman!

 

[Stratman]

No problem ! Make sure to post some photos once you make your decision. I would love to have the 10-20 also.