Sigma 10-20mm f/3.5 EX DC HSM


Digital Camera World - - KIT ZONE -

A lens with ‘con­stant’ at­trac­tion Lens mount s Canon EF- S, Nikon DX, Pen­tax K , Sony A , Sigma

Nearly 10 years old, this 10-20mm zoom pre­dates Sigma’s ‘Global Vi­sion’ line-up of Con­tem­po­rary, Art and Sport lenses. A re­vamp of the com­pany’s orig­i­nal 10-20mm lens for APS-C cam­eras, it swaps from a vari­able to a ‘con­stant’ aper­ture rat­ing.

Up-mar­ket glass in­cludes two ELD (Ex­tra­or­di­nary Low Dis­per­sion) and an SLD (Spe­cial Low Dis­per­sion) el­e­ment. Con­struc­tion is stur­dier than in the Canon and Nikon lenses, and the Sigma fea­tures a more con­ven­tional ring-type ul­tra­sonic aut­o­fo­cus sys­tem. Com­pared with Sigma’s 8-16mm lens, the more mod­est max­i­mum view­ing width en­ables a de­tach­able pe­tal-shaped hood and a fil­ter thread.

Cen­tre-sharp­ness is im­pres­sive through­out the zoom range, but cor­ner-sharp­ness isn’t quite as good as from the Sigma 8-16mm. Bar­rel dis­tor­tion at the short end and colour fring­ing through­out are con­trolled well.

Dig­i­tal Cam­era ver­dict

This vet­eran Sigma is a solid per­former with high-grade han­dling and im­age qual­ity, and its ‘con­stant’ aper­ture rat­ing is un­matched by com­pet­ing lenses at a sim­i­lar sell­ing price.

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