Amazingly sharp, well made, solid, all metal.

Only made for crop sensor SLR's

Okay, this lens doesn't have a written review yet, which suprises me. But it does have quick ratings that add up to 4.8 stars! And for a reason! In case you haven't seen the MTF resolution charts on this lens, it is one of the sharpest lenses ever made. When compared to other lenses, at photozone.com, the tests were amazing. This site only uses scientific tests, that are based on true testing rather than opinion. I bought it because of this, and it has lived up to the ratings. It is solid as a tank, super sharp, and just a beautiful lens. My only complaint? It isn't designed for full frame sensors. Bummer.