Starting with my first Pentax in 2014, a K-3 Prestige Edition! before a had a Sony A100 and before that a Minolta. soon I saw that my foto's where not sharp! I start searching for sharp lenses and Pentax was thé one, in that time the K-3 came out so I bought a K-3 with the "kit" lens 18-135mm that is sharp! Later the 2 Sigma's came on my way and now I'm looking for a midrange lens. Photography is my hobby!