The Sigma 150mm f/2.8 EX DG OS HSM APO Macro Lens (For Canon) is a super compact and lightweight large aperture telephoto lens, with life-size (1:1) macro capability. To maintain high optical performance from infinity to close-up 1:1 macro photos without accessories, this 150mm lens incorporates a "Floating Internal Focusing" (FIF) system. As a result, the lens also features a non-rotating front lens group which makes it easier to work with polarizing filters. The HSM feature provides ultra quiet high-speed autofocusing as well as full-time manual focus override.

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