Reviews and Problems with Canon EF 500mm f/4L IS USM
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Canon EF 500mm f4L IS USM
1 May 2011
Excerpt: Canon's EF 500mm f4L IS USM is a super-telephoto lens adored by wildlife and sports photographers alike. The 500mm focal length, equivalent to 800mm when mounted on a cropped-frame body, delivers decent-sized images of distant subjects, while the f4 maximum aperture allows you to isolate them with a very shallow depth-of-field.