Sigma 24-105mm f/4 DG OS HS M | A £600/$900

NEVER MIND THE APERT URE, CHECK OUT THE RANGE

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Sigma’s Art lenses tend to have ex­tra-wide aper­tures, for en­abling a tight depth of field. In this case, how­ever, Sigma has gone for an ex­tended zoom range at the ex­pense of a drop in aper­ture rat­ing from f/2.8 to f/4. Size and weight re­main man­age­able but, at 885g, the Sigma is no­tice­ably heav­ier than the com­pet­ing Nikon 24-120mm lens, which has an even big­ger zoom range.

In terms of build qual­ity and han­dling, this lens feels like a step up from Sigma’s DX-for­mat lenses and, like other FX-for­mat lenses in the group, this one fea­tures ring-type ul­tra­sonic aut­o­fo­cus. Two FLD (Flu­o­rite­grade Low Dis­per­sion) and two SLD (Spe­cial Low Dis­per­sion) el­e­ments are in­cluded, but there are no weather seals.

Per­for­mance

Con­sid­er­ing the gen­er­ous zoom range of this lens, im­age qual­ity is im­pres­sive: there’s plenty of con­trast and cen­tre-sharp­ness, even when shoot­ing wide-open at f/4. The Sigma also beats both of the com­pet­ing Nikon FX-for­mat lenses when it comes to min­i­miz­ing lens dis­tor­tion.

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