Summary: This lens isn't going to be as great as a more expensive lens but it does a good job. A bonus is the light weight of the lens which makes it more comfortable carrying around while bird watching.
Summary: We ordered the Nikon version of this lens to have it for a wedding we were attending later that week. It came but it was a day or two before I got to open it. You can imagine how my heart sank when we discovered that the VC didn't work right.
Summary: So far I've mostly shot landscapes with it, so heavy on the wide-angle end at f/11 & f/16. I'm very happy with the sharpness of the photos. At the long end, no so much. The few that I've taken near the 300mm haven't been particularly sharp.
Summary: I love this lens and would've given it 5 stars except for the very slow aperture at the long end of this zoom (f6.3@300mm.) First, the cons: It's not as sharp as either my Canon EF 24-105L or 100-400L lenses, but, hello, it's an apples to oranges comparison.
Excerpt: This lens fills an important gap. I shoot with a Canon 5d Mark iii, which I love. I shoot with a series of L lenses, which I also love. However when I travel, I am getting tired of dragging around four or five heavy lenses, especially when I travel by air.
Summary: A lens for those who do not want or can not be changing all the time and be surprised in a situation that requires the lens which is saved in your bag. I got great results in f:8 and good at f:4 ... Frankly this lens is better than I thought.
Summary: Five years ago my father-in-law gave me a Nikon D60 for my birthday, with a Nikon 18-50 and a Nikon 50-200. I love it, but a) I'm not gonna carry around two lenses most of the time, am I? b) 200 is long, but not really long. This one works well and takes good pictures.