Hi, I have been looking for a wide angle lens for my K-1, but the Pentax 15-30 is financially out of the question at £1499.00. I still have my K-3 and the Sigma 10-20 EX f/4-5.6, so I have been using that combo for some landscapes. The K-3 has enough resolution to deliver a detailed image, so I think I have a workaround for now. This is the Parade at Gorleston on Sea, Norfolk. The Tiff has more detail of course.