Summary: I had a Tamron of similar range for my last non digital Minolta SLR. Despite being assured my lenses would fit my Sony Alpha, if at slightly different f numbers, I was unhappy to find that that particular lens did not cross over. Having grappled with constant changes of lens on a recent trip to Iceland where the weather was variable with a capital V forcing one to protect the camera most of the time, I determined to reduce the risk of getting my equipment internally wet...
Summary: This is a great lens to carry about all day. It's lightweight and compact with a very versatile zoom range.The down side is image sharpness. However choosing aperture carefully minimises this shortfall.
Summary: I had been looking for a more versatile lens and as we all do these days, used the Internet views and YouTube videos to get some idea on what I was buying. I had for months been comparing canon 18-200 sigma 18-250 and the tamron 18-270 and had my hands on them at the focus show. Having the tamron in my hands made my mind up. It's small and light and works brilliantly.
Pros: Great Features, Great Picture Quality, Lightweight