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/4.5-5.6 DO IS USM review at photodo

"Simply put, a DO element comprises of two glass elements, which are etched on their facing surfaces with concentric lens surfaces, in a similar way to that found on a fresnel lens but with a few important alterations. The width of the concentric surfaces gets narrower towards the edges of the lens, which gives the elements aspheric properties, and promises to help control colour aberrations more effectively. It also . . . read more

Canon EF 70-300mm f/4.5-5.6 USM DO IS review at Photozone

"The Canon EF 70-300mm f/4.5-5.6 USM DO IS is a unique lens in its class. This is not all that obvious from its naked specifications but because of its DO design. DO refers to a multi-layer Diffractive Optical element that bends light steeper than conventional (refractive) elements thus allowing a shorter design in

. . . read more

Overview

Description by Canon:

A unique design amongst telephoto zoom lenses. The EF 70-300mm f/4.5-5.6 DO IS USM incorporates a Diffractive Optical (DO) element that delivers compact size, low weight and superb image quality

Canon EF 70-300mm f/4.5-5.6 DO IS USM Lens Review @ The Digital Picture

""A zoom lock switch (above) on the Canon EF 70-300mm f/4.5-5.6 DO IS USM Lens is a nice feature - It prevents the lens from extending when you don't want it to. The trade-off is that it makes the lens slower to put into action. Use it when you want to, don't use it when you might need to grab a quick shot.  . . . read more

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