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The Canon RF 700mm F28L IS USM is a brand new professional telephoto zoom lens for Canon fullframe mirrorless cameras Read our indepth Canon RF 700mm F28L IS USM lens review to find out if it's a musthave lens for Canon EOS R camera owners, complete with a gallery of fullsize sample imagesModern marvel Canon RF 700mm F28L IS USM sample gallery Published Nov 21, 19 dpreview staff Share Tweet We've been eager to test out Canon's impressively compact RF 700mm F28 ever since the company first made it known, and the day has finally come Its capabilities combined with its small size make it nothing short of a modernLike some of its predecessors such as the RF700mm F28L IS USM and RFmm F4571L IS USM lenses, the RF700mm F4 L IS USM is equipped with dual independent Nano USMs to help achieve highspeed and focus accuracy at any focal length or throughout its travel, and its focusing range Canon Rf 70 0mm F2 8 L Is Usm Slr Camera Lenses Canon rf 70-200 mm f/2 8l is usm