Fea­tures to look for…

Get the right mix of fea­tures to suit how you shoot

NPhoto - - Test Team -

DX or FX?

DX-for­mat lenses tend to be smaller and lighter in weight than FX-for­mat ones, but are made specf­i­cally for the smaller sen­sor size – can only be used in crop mode on full-frame bod­ies.

Aut­o­fo­cus

Of the lenses on test, only the Nikon 70-300mm VR and Tam­ron 70-300mm VC have quick and quiet ring-type ul­tra­sonic aut­o­fo­cus, but all can aut­o­fo­cus on any Nikon D-SLR body.

Zoom range

On DX (APS-C) bod­ies, lenses that stretch to 200mm or 300mm have an ‘ef­fec­tive’ max­i­mum zoom set­ting of 300mm or 450mm re­spec­tively.

Close-up fa­cil­ity

Both of the Sigma 70-300mm lenses and the non-VC Tam­ron 70-300mm are badged as ‘macro’ lenses. They fo­cus closer to give an above-aver­age 0.5x max­i­mum re­pro­duc­tion ra­tio.

In­ter­nal fo­cus

For lenses that have fully in­ter­nal fo­cus­ing, the front el­e­ment nei­ther ex­tends nor ro­tates (see com­par­i­son ta­ble, page 98). Aut­o­fo­cus can of­ten be no­tice­ably faster.

Vi­bra­tion Re­duc­tion

Nikon has gen­er­ally re­vised the claimed ef­fec­tive­ness of its VR sys­tems down­wards to around three f-stops, to com­ply with re­cently in­tro­duced CIPA test­ing.

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