I've had this lens for about three years now and was so glad to eventually replace it. It's hardly worth the effort. It suffers badly from chromatic aberration, and its dynamic range is quite limited. I did an event using it and was bitterly angry at myself for still having it, after seeing the quality of colour its produced. It can be a little soft on focus. However, I must admit, in normal conditions it can do well, but perhaps stay under 200mm and away from unusual or intense light. Otherwise, I'd only use it if I had to do a rockclimbing or other action sport shoot (where I don't want to drop my main lenses).