SIGMA 70-200MM F2.8 EX DG OS

Digital Photograper - - Group Test -

Sigma’s stal­wart 70-200mm un­der­cuts all of the other con­tenders for price, but that doesn’t nec­es­sar­ily make it a bar­gain

Pre­dat­ing Canon’s 70-200mm Mk II lens by a few months, the sigma was also launched back in 2010. It’s much less ex­pen­sive to buy, but is no match for the Canon and nikon lenses in terms of build qual­ity. The mostly metal-based bar­rel sec­tion still feels pretty ro­bust, but it’s the only lens in the group to lack weather seals.

The op­ti­cal path in­cludes two FLD (‘F’ low Dis­per­sion) el­e­ments, claimed to of­fer the same per­for­mance as flu­o­rite glass, and three SLD (spe­cial low Dis­per­sion) el­e­ments. Con­trols are the most ba­sic of any lens on test. There’s an auto/man­ual fo­cus switch with ba­sic man­ual over­ride avail­able, as fea­tured in the Canon lens, but with no aut­o­fo­cus range lim­iter. The only other switch is for the dual-mode Os (Op­ti­cal sta­bi­lizer), with static and pan­ning op­tions. The sta­biliser it­self is rated at four stops, but we could only get three-stop per­for­mance at best.

On the plus side, the aut­o­fo­cus sys­tem is very fast and able to track mov­ing sub­jects well. sharp­ness and con­trast are im­pres­sive, even when shoot­ing wide open. In this re­spect, the sigma pretty much matches the per­for­mance of the pricier Canon lens. In our tests, the sigma was ac­tu­ally slightly sharper at 135mm and dropped off marginally less at ei­ther end of the zoom range, when us­ing wide aper­tures be­tween f2.8 and f4.

Over­all, the lens is well worth its ask­ing price. even so, it’s due an up­date and would ben­e­fit from some of the ex­otic fea­tures built into sigma’s lat­est 150-600mm sport and Con­tem­po­rary class lenses.

Be­low

Back to ba­sics

The aut­o­fo­cus sys­tem is speedy but ba­sic, and the op­ti­cal sta­biliser isn’t as ef­fec­tive as in the other lenses on test

Be­low left Go­ing steady

70mm

Per­for­mance of the op­ti­cal sta­biliser is medi­ocre, but good

wide-aper­ture sharp­ness en­ables fast shut­ter speeds

Be­low right Track­ing parcels

200mm

Fast aut­o­fo­cus per­for­mance en­ables good con­tin­u­ous AF accuracy when

pan­ning to track mov­ing sub­jects

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