Hello everybody, If you use internet for work, entertainment, obtaining information, communication or whatever, you probably got fed up with numerous ads popping up whenever you do not expect it. Furthermore, you receive, from time to time, unwanted e-mails offering all and nothing from companies you have never heard of. Have you ever think of what the problem is, what is going on?

Recently I have decided to buy a wide angle lens in order to improve my landscape pictures, some architecture and street pictures. Forasmuch I own Pentax cameras with K bayonets, first, I was trying to make decisions between zoom lens Sigma 6-18 and Pentax12-24.