com­Pact ul­tra-Wide Zoom From tam­ron

Camera - - WHAT’S NEW -

Tam­ron has an­nounced yet an­other new lens for Canon and Nikon full-35mm D-SLRs. This time it’s an ul­tra­w­ide zoom in the shape of a 17-35mm f2.8-4.0 Di OSD which is due to launch right now in the Nikon mount with the Canon EF ver­sion fol­low­ing “at a later date”.

Tam­ron says its new 17-35mm (des­ig­nated Model A037) is cur­rently the small­est and light­est lens in its class, weigh­ing 460 grams (in both mounts) and mea­sur­ing just 90 mil­lime­tres (Nikon). Tam­ron also says it rep­re­sents a new line of ul­tra-wide zooms – com­pared to the ex­ist­ing SP 15-30mm f2.8 model – with an em­pha­sis on op­ti­mum porta­bil­ity and in­creased af­ford­abil­ity. The ex­ter­nal con­struc­tion is weather sealed which is com­pli­mented by a flu­o­rine coat­ing on the ex­posed sur­face of the front el­e­ment. The op­ti­cal con­struc­tion com­prises 15 el­e­ments in ten groups which in­cludes four with low dis­per­sion (LD) char­ac­ter­is­tics to help min­imise ax­ial chro­matic aber­ra­tions. Ad­di­tion­ally, two el­e­ments are as­pher­i­cal types – cre­ated via the glass mould­ing tech­nique – de­signed to cor­rect for dis­tor­tion and spher­i­cal aber­ra­tions. Tam­ron’s BBAR­type (Broad-Band Anti-Re­flec­tion) multi-coat­ing is em­ploy to re­duce in­ter­nal re­flec­tions and hence min­imise ghost­ing and flare.

Aut­o­fo­cus­ing is per­formed via an ul­tra­son­i­cally-pulsed drive – which Tam­ron calls OSD or ‘Op­ti­mised Silent Drive’ – which in­cludes a speed re­duc­tion gear for more pre­cise con­trol. This is specif­i­cally to en­hance the fo­cus track­ing per­for­mance with the higher-speed cur­rent-gen­er­a­tion D-SLRs. The min­i­mum fo­cus­ing dis­tance is 28 cen­time­tres which gives a max­i­mum re­pro­duc­tion ra­tio of 1:4.9 at 75mm. Other fea­tures in­clude a seven-blade di­aphragm, a min­i­mum aper­ture range of f16-f22 and a screwthread fil­ter fit­ting of 77 mil­lime­tres di­am­e­ter. The new ul­tra-wide zoom is com­pat­i­ble with Tam­ron’s ‘Tap-in Con­sole’ USB dock which al­lows for firmware up­grades and cer­tain ad­just­ments to the AF op­er­a­tion.

The new Tam­ron 17-35mm f2.8-4.0 Di OSD is priced at $999 (Nikon mount).

Tam­ron lenses are dis­trib­uted in Aus­tralia by Blonde Ro­bot and for more in­for­ma­tion visit www.tam­ron.com.au

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