lens

I have purchased the Pentax HD DA 11-18mm f/2.8 ED DC AW lens a year ago and wanted to use it as main wide angle lens. After a year I have to admit it is great lens especially when used on my Pentax K3-iii camera. To briefly summarize my experience I can describe the lens as follows:

Recently I have decided to buy a wide-angle lens in order to improve my landscape pictures, some architecture and street pictures. For as much I own Pentax cameras with K bayonets, first, I was trying to make decisions between zoom lens Sigma 6-18 and Pentax12-24. In the end, I have decided to buy a fixed focus lens (anyway I do own only one prime lens by now) for my APS-C camera as some kind of compromise because I know that next year full-frame Pentax camera should be introduced.