I used this lens on my 7D for about 5 years until my camera and lens were stolen. After a year of waiting and saving up, I finally made up my mind to buy this lens again. I've become very used to how the lens shoot over the years and that was the main reason that led me to purchase it again.

this is one of canons top of the range lenses, you cant get any better than this just look for the red ring on the lens barrel and you can tell its a top of the range lens ive had one now for about 2 years and its a permanent fixture on my camera i use it as a Walk-About-Lens works on both full

Awesome Picture Quality; Build Quality; Canon; Fits APS-C; Fits Full Frame; Sharp; TOP OF THE RANGE

Great for landscapes, sunrises, and sunsets - particularly in combination with graduated neutral density filters to balance exposure of land and sky. Amazing for indoor room photos - a must for any Realtor. Superior for architects' pictures of structures.

Easily Interchangeable; Fast / accurate auto-focus; Lightweight

"I would disagree with Josh. You can't compare 17-40mm lens to 14-24mm lens and rate them. You are comparing apples and oranges. 17-40mm L is a great glass for its value."

This lens is simply great. The only concern I had about it was the sharpness in the corners but being a landscape photographer and shooting mostly at F8 and up, I don't have a single complaint. The zoom range is great, colours are fantastic and build quality is, well it is an L lens!

I'm still learning how to use it, but thus far this lens way out does the lens that comes with the body. High quality pictures with exceptional captures.

Very sharp, found it to be much sharper and more accurate than my 24-70 2.8L, however when open wide at 17mm, there is some considerable distortion to watch out for especially with portraits. Photoshop's lens corrector tool should be able to help with that though.

Pros: Lightweight, Fast / accurate auto-focus, Easily Interchangeable Cons: Other thoughts: Great for landscapes, sunrises, and sunsets - particularly in combination with graduated neutral density filters to balance exposure of land and sky. Amazing for indoor room photos - a must for any Realtor.

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Bought this lens to round out my lenses for Landscape photography. Took it on a recent trip to shoot waterfalls at a local state park, did a great job. Sharp, vibrant pics - very satisfied!