Canon Up­dates Both Its L 70-200mm Zooms

Camera - - WHAT’S NEW -

both its L Series 70-200mm zooms – the f2.8 and f4.0 speed mod­els – an up­grade to im­prove both op­ti­cal per­for­mance and the op­er­a­tional con­ve­nience.

The new EF 70-200mm f2.8L IS III USM has a sealed bar­rel con­struc­tion against dust and mois­ture, com­ple­mented by new flu­o­rine coat­ings on the ex­posed sur­faces of both the front and rear el­e­ments which makes them eas­ier to clean. It also has Canon’s lat­est ‘Air Sphere Coat­ing’ (ASC) which is a new anti-re­flec­tive tech­nol­ogy de­signed to min­imise both re­flec­tions and flare. The ‘Air Sphere Coat­ing’ re­duces the speed that light trav­els through the air-to-glass so there is not such a large change in speed when the light en­ters through the glass thereby pre­vent­ing the cause of vis­i­ble ghost­ing and flare. In turn, this helps op­ti­mise con­trast and colour sat­u­ra­tion.

The op­ti­cal con­struc­tion com­prises 23 el­e­ments in 19 groups which in­cludes five flu­o­rite and five ul­tra-low dis­per­sion (UD) types to min­imise var­i­ous aber­ra­tions. The min­i­mum fo­cus­ing dis­tance is 1.2 me­tres and aut­o­fo­cus­ing is per­formed via Canon’s ‘Ring USM’ ul­tra­sonic drive. The min­i­mum aper­ture is f32 and the di­aphragm has eight blades to help cre­ate smoother out-of-fo­cus ef­fects.

The new EF 70-200mm f4.0L IS II USM model is a more com­pact and light­weight lens, weigh­ing in at a very man­age­able 780 grams (al­though this is still marginally heav­ier than the pre­vi­ous model). Its op­ti­cal con­struc­tion com­prises 20 el­e­ments in 15 groups (in­clud­ing one flu­o­rite and two UD types), and em­ploys Canon’s ‘Su­per Spec­tra Coat­ing’ (SSC) to min­imise ghost­ing and flare. The min­i­mum fo­cus­ing dis­tance is one me­tre. The f4.0 speed lens also has weath­ersealed ex­ter­nal con­struc­tion with flu­o­rine coat­ings on the ex­posed el­e­ment sur­faces to help bet­ter re­pel both mois­ture and grease.

The Mark II zoom’s op­ti­cal im­age sta­biliser has been given in­creased ef­fec­tive­ness so that it now pro­vides cor­rec­tion for up to five stops of cam­era shake, com­pared to the pre­vi­ous model’s three stops. Canon says it’s also qui­eter than be­fore.

The aut­o­fo­cus­ing drive also gets a boost in per­for­mance from a third-gen­er­a­tion ‘EF en­gine’ which in­cor­po­rates a higher-speed CPU and newly-de­vel­oped firmware which is claimed to en­hance both the speed and ac­cu­racy. Drive is via Canon’s ul­tra­sonic ‘Ring USM’ mo­tor.

For more in­for­ma­tion about Canon’s L series lenses visit www.canon.com.au

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