I bought this lens for a photo-trip to Horseshoe Bend in Page, Arizona. The lens did a great job, even at the extremes of the zoom range. Buying through Crutchfield was a pleasant experience, they kept me up-to-date on my order the whole way through.

great sharpness throughout; has wide focus and zoom rings

does not seem as durable as other Canon "L" glass

Great lens in its class, fast delivery home, very well, I fell in love with this lens, it is very wide, sharp, nice colors, fast AF and the rest. There is one problem canon did not update and my camera does not recognize the lens, i can not make jpeg shots, canon camera 5dm3

Consistent Output; Durable; Easily Interchangeable; Lightweight; Quick Focus; Rugged; Sharp Focus; Strong Construction

Upgraded from Canon's 17-40 L and the difference in image quality improvement is really noticeable. Images are pin sharp right into the corners even wide open. The IS is handy for low light too. Got some superb night shots of New York with this lens.

I was looking for a wide angle zoom lens for my EOS 6D and while the EF 16-35mm f/4L IS USM is not the most affordable option I feel like it's worth every penny. On the 20 megapixel sensor of the 6D it delivers sharpness at every focal length and every aperture from corner to corner. It also shows little to no chromatic aberrations and handles flare very well. All around a professional level lens that never lets you down.

I wanted this lens just for landscape photography. I also have a Canon 24-70mm F/4 which is great. It's just that sometimes I needed a wider view. This lens deliveres and is perfect for any landscape photographer.

Was going back and forth between this one and the f/2.8 variant. I haven't found a need for the f/2.8 yet and I shoot often with this lens. Gets extremely wide on a FF camera. Highly suggested for group shots.

I have used this lens for 8 months, almost all shots outside, mostly landscapes, and mostly with a crop frame 77D where the focal length is more like 26-56. I have used it on a 5D mark IV as well. The biggest upside surprise is how well it works as a macro for wildflowers.

Not a lens that I use a lot but it is great for that wedding photo with a difference - the group photo or a close up of the couple with a great background. Also good for interior shots where flash is not permitted

It is hard not to be happy with this lens, between its IS & durable yet lightweight build, it is the best wide angle for action sports, landscapes and general purpose shooting. With it being F/4, I've never found it to be a limiting factor and couldn't be more happy with its edge to edge sharpness.

Beautiful lens. Snapped it up on special at a great price. Wonderful on Canon 6Dmk2.