Summary: Great optics for an older zoom. I shoot with a high megapixel body, and weaker zooms have detrimental IQ. Wide open corners at some focal lengths, this lens is not perfect however good, and very good 2/3's of the center frame. Stop it down a stop or so for sharpness across the frame.
Summary: Excellent lens when paired with my A99. Fast focusing and tracking, and it's built very well. Not very happy with Adorama, though. The lens was dirty and grimy when I got it and they didn't disclose how much wear and tear it had when they listed it. Also, they're slow to ship.
Summary: I have used this lens for a year now, fairly constantly. It takes a while to get used to it. It does not especially like low light and it is not weather proof. It would make a very good south-west lens, but in the east you have to be aware of these issues.
I have used this lens more than any other lens and it has been a pretty good lens
22 July 2014
Summary: I purchased this lens September 18, 2012 so I think enough time has passed to give a review. I have used this lens more than any other lens and it has been a pretty good lens. I sent it in to be gone over before the warranty expired and because my photos were coming out extremely blurry.
Summary: Granted F/4 is not a super fast lens, but this thing spends more time searching than it gives me for shooting. Maybe it is something with this one lens, but for the price I am seriously disappointed
Summary: The picture says it all. Just started taking pictures 2 years ago. This lens was dropped down a concrete stairs in Oregon. Fell off of a tripod, safety lock not secured. Still works fine. I like the lens so much, for the price I bought a new backup lens. Now I have two.