Canon EF 70-300mm f/4-5.6L IS USM Lens full-frame review by Ivo Freriks at Camera Stuff Review: The Canon 70-300 mm L is, given its optical performance and solid finish, an attractively priced compact telephoto zoom lens.

The Lens was previously tested with a cropped camera (EOS 650D) and now with a full frame EOS 5D Mark II Dslr body:

"The Canon 70-300 mm L is, given its optical performance and solid finish, an attractively priced compact telephoto zoom lens. The higher vignetting and distortion that you get, when using this lens, makes the total score of the Canon 70-300 mm L review half a point lower than the final score of our Canon 70-300 mm L review on a Canon 650D. Those who shoot in RAW can easily remove this difference by using the standard lens correction profiles in Canon's DPP software, Lightroom or Photoshop. In short, this is a lens to use with pleasure for years. . . . read more

Canon EF 70-300mm f/4-5.6 IS USM Lens Review @ The Digital Picture

"Slow focusing was one of the downfalls of the Canon EF 75-300mm f/4.5-5.6 IS USM Lens. Canon states that autofocus has been improved in the Canon EF 70-300mm f/4-5.6 IS USM Lens. But, Ring USM (Ultrasonic Motor) is not part of the package. Improvements in the CPU and AF routines help in the focus performance increase according to Canon. Accuracy is often more important than speed. . . . read more

Overview

Description by Canon:

Advanced three-stop Image Stabilizer (IS) technology makes the EF 70-300mm f/4-5.6 IS USM an ideal telephoto zoom for shooting in dim light and at slow shutter speeds without incurring camera shake.

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