29 of 31 people found the following review helpful
This review is from: Canon EF 70-200mm f/4.0 L USM Lens (Electronics)
If you are looking for a good yet affordable telephoto zoom for your Canon DSLR, the Canon EF 70-200mm f/4 L USM could well be the perfect choice. The optical quality is immaculate. With my other lenses there is a noticeable drop in sharpness when using the widest aperture. This lens is tack sharp throughout the entire range, so you can shoot wide open without compromising sharpness. Construction is first class as expected from a Canon L series lens and the USM focusing is quiet, fast and accurate. I have not yet experienced issues with back focusing as some have previously mentioned. At f/4, it's not the fastest lens in the world and it lacks image stabilization, so a tripod is required at long focal lengths or in low light. However,it makes up for these omissions by having great optics and a very reasonable price tag compared to its higher spec Canon siblings. A highly recommended investment.