Per­for­mance

NPhoto - - Test Team -

The man­ual fo­cus ring is smooth and ef­fec­tive in use, en­abling greater pre­ci­sion than in the Nikon 40mm lens. Bar­rel dis­tor­tion can be no­tice­able, more so than in most com­pet­ing lenses. Sharp­ness could also be bet­ter at f/3.5, es­pe­cially con­sid­er­ing the com­par­a­tively nar­row max­i­mum aper­ture. Ar­guably the most ver­sa­tile lens in the group, the Sigma 105mm works bril­liantly for both close-ups and por­traits, while also hav­ing a fast ring-type ul­tra­sonic aut­o­fo­cus sys­tem that makes it suit­able as a fast, short tele­photo lens for ac­tion pho­tog­ra­phy.

Up­mar­ket fea­tures in­clude a three-po­si­tion fo­cus lim­iter switch en­abling short, long or full fo­cus travel. There’s also a highly ef­fec­tive dualmode op­ti­cal sta­biliser, with a ded­i­cated switch on the bar­rel that en­ables se­lec­tion of static or pan­ning modes. Fo­cus­ing is fully in­ter­nal, so the over­all length of the lens re­mains fixed through­out the fo­cus range.

Build qual­ity feels rugged, although there’s no weather seal on the mount­ing plate, as fit­ted to all three Nikon lenses and the Tam­ron 90mm VC USD. Lit­tle ex­tras in­clude a hood adap­tor that main­tains op­ti­mum ef­fec­tive­ness on ei­ther FX- or DX-for­mat bod­ies.

Per­for­mance

Fast aut­o­fo­cus is matched by smooth and pre­cise man­ual ad­just­ment. Im­age qual­ity is sim­ply su­perb, even when us­ing the widest avail­able aper­ture. We thought this lens was out­stand­ing value a year ago, and since then Sigma has knocked a third off the price, mak­ing it all but ir­re­sistible.

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