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Get information and user reviews for this lens from Amazon: Sigma 150mm f/2.8 EX DG HSM APO HSM IF Macro Lens for Canon SLR Cameras
The Sigma AF 150mm f/2.8 APO EX macro DG D is one of the few third-party lenses that can play in the league up there with the big boyz. The performance figures are excellent and leave really nothing to be desired across all tested quality characteristics. The mechanical build quality is very good thanks to a metal body and a true IF (internal focusing) design with a constant physical length. The AF speed is about average in absolute terms but pretty good for a macro lens. Thanks to Sigma’s HSM (Hypersonic-Motor> the AF operates virtually silent. The lens is compatible to Sigma’s APO EX DG converter so there ´s also an option for some extra reach or increased working distance if needed. The price tag of the lens is moderate at around 550-600 â‚¬/US$.
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