NPhoto - - Test Team -

Aut­o­fo­cus is quick, but not as fast as in the Nikon lenses. The re­vamped op­ti­cal sta­biliser is more ef­fec­tive than in Sigma’s older 150-500mm OS, giv­ing a four-stop ben­e­fit in our tests. Flu­o­rite-grade glass boosts im­age qual­ity. While sharp­ness drops off at the long­est zoom set­tings, it still beats the Nikon 80-400mm at 400mm.

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