I have owned this lens for a long time. I purchased it because of its versatility, it give very sharp images, it's not to heavy, and built like a tank. It's an excellent alternative to the more expensive ones like the I.S. and the 2.8 version. It's also lighter.

I got the new lens and immediately went out and did 2 photo shoots in 1 day. I didn't know I was such a great photographer (tee hee). All jokes aside this is my first L series lens and it was such a joy to use it. The lens caught focus quickly and the photos came out fabulous.

ola, simplesmente fantastica...e minha lente favorita,eu adoro essa lente resolução de imagem impecavel ela e tudo oque se espera de uma lente L da canon...estou apaixonado por essa lente.

There are many uses for the Canon EF 70-200mm f/4.0 L USM Lens, but portrait photography is one of the best. Outstanding image quality.The most dazzling lens in my bag.

Consistent Output; Durable; Easily Interchangeable; Lightweight; Strong Construction

Poor in Low Light

The Canon EF70-200mm f4L IS USM Telephoto Zoom Lens is a great and versatile lens for landscape and wildlife photography. It is very very sharp with dynamic color. It is not too heavy and is very portable. The focus is just excellent.

Sharp; versatile; portable

none

This was my first significant lens purchase, and it hasn't disappointed. I have a Rebel Xsi, and without the battery grip, this lens would seem a bit large on that body, but otherwise it does a phenomenal job! After much research, I decided to start with this lens to add reach to the kit lens.

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

Heavy

I bought this very lens about 2 years ago. I love it. The pictures I take with this lens looks like a professional has taken them.The telephoto lens is a must have for taken outside pictures.

I have had two of the 70 - 200 2.8 IS lenses and have always been disappointed with the amount of time it took to engage the IS. The IS lens would fish around when in that mode and so I usually had it turned off and used a shorter shutter speed for preference in getting a crisper image.

It's a great lens for certain things. I use it mainly for landscapes. The f4 is not important in landscape so if you need it for sports/wildlife don't bother, get the longer fixed focal length 300 or 400mm which are both superb. As a general low to mid length focal length it's hard to beat.

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

After procrastinating for quite some time because I do have a large range of Canon lenses for my cameras, cost etc I took the plunge and bought this. Thus far all my test images are superb with a real difference when compared with other images with other lenses. I just wish I had not waited so long.