Excerpt: I am using this lens on my canon 100D camera. It stays mounted over 90% of the time I go out shooting. Very good quality image. I must say it is almost as good as L lenses. Possibly the best lens for my camera that I could buy at this price.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction
Excerpt: Had to have this lens when I discovered Canon made it. So when I ordered a Canon 70D for both stills and video for my publishing company, I got this to go with it. I love it! The fast speed gives me nice bokeh even in wider angle settings. Autofocus is fast and quiet and the whole lens feels as solid as an L lens for a whole lot less money.
Pros: Durable, Fast, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Rugged
Excerpt: This lens may not have the "red ring" or water resistant build quality, but optically, this IS an "L" lens. For those of you who have an 18-55mm f/3.5-5.6 kit lens and are wondering how much better could this 17-55mm f/2.8 lens, that cost more than my camera be, the answer is NIGHT & DAY!!! My pics went from meh to WOW.
Pros: Consistent Output, Easily Interchangeable, Fast / accurate auto-focus, Nice Bokeh