SIGMA PUR­SUES MORE ART... AND SPORT

Camera - - WHAT’S NEW -

SIGMA CON­TIN­UES TO de­velop its ‘Global Vi­sion’ pro­grams of three high-per­for­mance lens se­ries spe­cific to ap­pli­ca­tions. At Pho­tok­ina the lens maker added two mod­els to its Art line – an 85mm f1.4 DG HSM fast prime and a 12-24mm f4.0 DG HSM wide-an­gle zoom – and a new Sport model, the 500mm f4.0 DG OS HSM su­pertele­photo. All are ac­tu­ally de­signed for use with full-35mm size sen­sors.

Fast, high-per­for­mance 85mm primes are quite fash­ion­able at the mo­ment (Sony, Nikon, Zeiss, etc), but the new Sigma Art model looks ca­pa­ble of be­ing com­pet­i­tive, and has been de­signed to work with the lat­est ultra-high res­o­lu­tion full-35mm sen­sors. Its 14-el­e­ment op­ti­cal con­struc­tion in­cludes two SLD (spe­cial low dis­per­sion) types and one em­ploy­ing glass with anoma­lous par­tial dis­per­sion and re­frac­tion characteristics. A re-en­gi­neered AF sys­tem is claimed to give a 1.3x in torque over its pre­de­ces­sor, and a full-time man­ual fo­cus over­ride is pro­vided. The new 85mm f1.4 Art is avail­able in Canon, Nikon and Sigma mounts, with the Nikon ver­sion em­ploy­ing an elec­tro­mag­net­i­cally ac­tu­ated di­aphragm. This is also the case with the 12-24mm Art zoom and 500mm Sport tele.

The new 12-24mm f4.0 zoom is also an up­graded Art ver­sion of a pre­vi­ous model and its 16-el­e­ment op­ti­cal con­struc­tion in­cludes, says Sigma, the largest glass-moulded as­pher­i­cal el­e­ment in the in­dus­try. This is de­signed to al­low an ultra-wide zoom with min­i­mal dis­tor­tion, flare or ghost­ing. This model also em­ploys ele­ments made with Sigma’s FLD (“F” Low Dis­per­sion) glass which is claimed to be equiv­a­lent to cal­cium flu­o­rite in per­for­mance and pro­vides a very high de­gree of cor­rec­tion for chro­matic aber­ra­tions. Sigma’s new higher-torque ‘Hyper Sonic Mo­tor’ (HSM) AF sys­tem de­liv­ers im­prove­ments in aut­o­fo­cus­ing speed, and the ex­ter­nal con­struc­tion has been restyled to con­form with the dura­bil­ity and styling of the Art line lenses.

The 500mm f4.0 Sport lens fea­tures mag­ne­sium al­loy com­po­nents in its phys­i­cal con­struc­tion – as well as a car­bon­fi­bre lens hood – to help re­duce its weight. The bar­rel is sealed against dust and mois­ture and the front el­e­ment fea­tures a spe­cial coat­ing to help re­pel wa­ter and grease. The 16-el­e­ment op­ti­cal con­struc­tion in­cludes two FLD and one SLD type to op­ti­mise sharp­ness and help min­imise both spher­i­cal aber­ra­tions and ax­ial chro­matic aber­ra­tions. The op­ti­cal sys­tem also re­duces trans­verse chro­matic aber­ra­tions which can be an is­sue with long tele­photo lenses. The new 500mm has a rear, drop-in fil­ter holder which ac­cepts 46 mm di­am­e­ter screwthread types, and dual-mode op­ti­cal im­age stabiliser. There is also a cus­tomis­able ‘AF re­turn’ func­tion for the set­ting a de­sired fo­cus po­si­tion with the abil­ity to in­stantly re­turn to this pre­set dis­tance at any time.

All three of these new Sigma lenses will be avail­able lo­cally over the next cou­ple of months. Visit www.sigmaphoto.com.au for more de­tails and pric­ing.

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