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USA Landscape Photographer of the Year 2016 open to entries NOW!
"It's a world first for a standard zoom lens: An exceptional 1:2.0 aperture across the entire zooming range. Combined with its 2.5x zoom, this lens provides pro photographers with a never-before-had level of flexibility. And together with the ultra-fast AF speeds afforded by the SWD system, a great photo moment need never be missed again."