New gear

Two top new Sigma lenses, a re­mote flash con­troller, and plenty more

NPhoto - - Contents -

Sigma’s lat­est standard zoom is vy­ing with Nikon’s AF-S 24-70mm f/2.8E AF-S ED VR to win a place in your kit bag. It shares the same 88mm bar­rel di­am­e­ter as the Nikon, but at just shy of 108mm long it’s con­sid­er­ably shorter. Like the Nikon, it boasts an con­stant f/2.8 aper­ture, while its 19-el­e­ment op­ti­cal stack is de­signed to max­i­mize the re­solv­ing po­ten­tial of cam­eras with ul­tra-high-res sen­sors, like the D810. It fea­tures three SLD (Spe­cial Low Dis­per­sion) and four as­pher­i­cal el­e­ments to con­trol aber­ra­tions, flare and dis­tor­tion. Ul­tra-pre­cise lens el­e­ment pro­cess­ing, mea­sured in hun­dredths of a mi­crom­e­ter, is sup­posed to of­fer im­proved bokeh qual­ity by min­i­miz­ing un­sightly con­cen­tric bokeh rings that can be pro­duced by nor­mal as­pher­i­cal el­e­ments.

The fo­cus on qual­ity con­tin­ues on the out­side, as the lens is built to Sigma’s range-top­ping Art standard. That trans­lates to a mostly metal lens bar­rel, en­cir­cled by tough TSC (Ther­mally Sta­ble Com­pos­ite) con­trol rings and switches. The bar­rel is also splash­proof and fea­tures a weather-sealed mount, along with a wa­ter- and oil-re­pel­lant coat­ing on the front el­e­ment. This all helps in­crease the ver­sa­til­ity of a lens that al­ready of­fers one of the most pop­u­lar fo­cal length ranges. And that flex­i­bil­ity ex­tends into low light thanks to a brand new Op­ti­cal Sta­bi­lizer. The lens also gets a newly de­signed HSM (Hy­per-Sonic Mo­tor) aut­o­fo­cus sys­tem that of­fers 1.3x the torque of its pre­de­ces­sor for faster and more ac­cu­rate fo­cus­ing. The new F-mount ver­sion also ben­e­fits from an elec­tro­mag­netic aper­ture di­aphragm that en­sures ex­tra pre­ci­sion when us­ing auto ex­po­sure dur­ing con­tin­u­ous shoot­ing. First im­pres­sions_ A fast, mid-range zoom lens that looks very good on pa­per; we’ll be sure to put Sigma’s claims to the test as soon as pos­si­ble.

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