Fea­tures to loo k for …

Here are some of the things you might like to con­sider when you’re think­ing of go­ing long

NPhoto - - Test Team -

Sta­bil­i­sa­tion

Op­ti­cal sta­bil­i­sa­tion can be a huge bonus for telephoto shoot­ing (see Know Your Lim­its, page 77). Dual-mode sta­bilis­ers are ef­fec­tive for sep­a­rat­ing static and pan­ning shots.

Aut­o­fo­cus

Fast and quiet ring-type ul­tra­sonic aut­o­fo­cus is fea­tured on all of the lenses on test. It’s great for track­ing both ac­tion and wildlife.

Aper­ture

A wider avail­able aper­ture that re­mains con­stant through­out the zoom range en­ables faster shut­ter speeds at all fo­cal lengths, but the lens will be big­ger and heav­ier.

Weight

The weight of the lenses on test ranges from an eas­ily man­age­able 1.57kg to a whop­ping 6kg. It’s a big con­sid­er­a­tion if you’re trekking far or need to shoot hand­held.

Zoom range Weather seals

Some lenses have no weather seals, while oth­ers have rub­ber seals on their mount­ing rings, and a few have ad­di­tional seals on their op­er­at­ing rings and switches. Un­like with, say, an 18-200mm su­per­zoom lens, the long­est avail­able fo­cal length of a telephoto zoom lens is gen­er­ally more im­por­tant than its over­all zoom range.

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