This easy-to-use standard zoom lens can cover a large zoom area ranging from 24mm wide-angle to 105mm portrait-length telephoto, and its Image Stabilizer Technology steadies camera shake up to three stops. Constructed with one Super-UD glass element and three aspherical lenses, this lens minimizes chromatic aberration and distortion. The result is excellent picture quality, even at wide apertures. Canon's ring-type USM gives silent but quick AF, along with full-time manual focus. Moreover, with dust- and moisture-resistant construction, this is a durable yet sophisticated lens that meets the demands of advanced amateur photographers and professional photographers alike.
This is my first L lens and I have a slightly mixed opinion so far. The build quality, focus speed/accuracy and general image quality seem fantastic. However, I have not found the sharpness to be quite what I hoped for; on center it's similar to my previous non-L tele, and not as good as my inexpensive 50mm f1.8 II. It is a versatile lens, but with a fairly significant weight & cost.
March 18, 2014
Great All Purpose lens
I love this lens...I use it often...even over my 24-70mm...with the IS this lens is as good as the 24-70mm. It is very light and on the 5D3 and 1DX it is very sharp at 70mm...it does have some vignetting at 24mm...but nothing that cannot be corrected in post processing...A great all purpose lens!
February 14, 2014
Amazing all around
This lens is great if you are just starting to purchase L lenses. This is amazing all around and great for video, basically an all purpose L lens. It allows you to experiment with many focal lengths to let you know what lens to buy next. My only improvement would be a hybrid IS system (like in the 100mm macro L) and a faster aperture like f/2.8.
January 15, 2014
Always a winner
I have carried this lens literally all over the world. Shot so many photos with it that the barrel had to be refurbed at Canon. Never lets me down. very sharp. Durable (has been dropped in safari trucks) and reliable. My walk around lens on my 5d MkIII
January 10, 2014