Canon EF 70-300mm f/4-5.6 USM IS - APS-C Format Review / Retest
4 July 2010
Conclusion: The Canon EF 70-300mm f/4-5.6 USM IS is a very decent performer when used on an APS-C DSLR. It is capable of delivering very good results throughout the range. The peak performance is, of course, in the lower range but the results are still pretty impressive at 300mm.
Excerpt: Despite being relatively light in weight, it felt robust in the hand and well-balanced on our EOS 60D body. The zoom extended smoothy and during testing, the AF performed quickly thanks to the built-in Ultrasonic Motor (USM), locking onto targets with no signs of hunting.