I recently switched from Nikon to Canon and this was my first lens purchased for my 5D Mark II. My decision was made after reading several reviews from websites and blogs. I have to tell you they are all right! This lens takes sharp and vibrant pictures. Good bokeh too, though not the best.

Excellent lens, as expected for an L series lens, Very light

Great sharp lens!

This is a great wide angle lens & in my eyes represents better value than the 16-35 for a few reasons:1- it's literally half the cost2- it's a lot lighter3- I don't have a need for f2.8 when shooting landscapes.I really like the images that it produces & the quality of the L glass speaks for itself.

Top quality wide angle lens, with great use for landscape photography.

Top quality wide angle lens, with great use for landscape photography.

This lens has been my go to for landscape photography for several Years and the images has been sharp as a tack .

Canon makes two high-quality wide-angle zoom lenses for full-frame cameras, the 17-40/4L reviewed here and the Canon EF 16-35mm f/2.8L II USM , ( compare prices ). In the digital era, the 17-40 has been overlooked to some extent.

Canon EF 17-40mm f/4L USM is one of Canon's professional grade lenses, first released in May of 2003. It is one of only four ultra wide zoom lenses Canon manufactures at this time.

Because it is a very high quality but moderately-priced ultra wide angle zoom lens, the Canon EF 17-40mm f/4L USM Lens is one of Canon's best selling lenses. The 17-40 f/4L fills out the bottom focal length range of Canon's f/4L zoom lens series .