Canon EF-S 18-200mm 1:3.5-5.6 IS preview

The EF-S 18-200mm F3.5-5.6 IS is Canon's latest zoom lens for APS-C format DSLRs, introduced as a companion to the EOS 50D. Its announcement is unlikely to come as a surprise to many, as rumours of its imminent introduction have been circulating on the web for weeks, but it will still please Canon owners in search of an all-in-one lens ideally suited to travel and everyday shooting. With its 11x zoom range, this lens is Canon's most ambitious consumer-level zoom to date; the company has previously shied away from producing relatively inexpensive superzooms, with its only previous foray into this sector being the 28-200mm F3.5-5.6 (USM) for 35mm, which was introduced in late 2000. Indeed it's this older lens which the 18-200mm most strongly resembles, however Canon have managed to squeeze plenty more into the design in the intervening eight years. The zoom range has been stretched to a 35mm-equivalent range of 29-320mm, and the new lens incorporates Canon's latest compact image stabilization unit (as seen on the EF-S 18-55mm F3.5-5.6 IS and the EF-S 55-250mm F4.5-5.6 IS), which offers automatic panning detection and (according to the company) four stops of stabilization.

One design decision may however cause a degree of dismay; the lens uses a relatively unsophisticated micro motor system for autofocus, as opposed to the ring-type USM design more commonly seen on mid-range lenses such as the EF-S 17-85mm F3.5-5.6 IS USM. Consequently, potential buyers may struggle to find any obvious advantage over Tamron's recently announced 18-270mm F3.5-6.3Di II VC LD Aspherical (IF) Macro, which sports a longer zoom range and Tamron's own optical stabilization system. Aside from this, Canon have produced a lens which is clearly designed to counter the undeniable buyer appeal of Nikon's popular AF-S 18-200mm F3.5-5.6 VR head-on. So let's take a closer look at the new lens's design.

Headline features

* 29-320mm equivalent focal length range; F3.5-5.6 maximum aperture
* Optical image stabilization – 4 stops
* EF-S mount for Canon APS-C dSLRS only



出處/From：[dpreview]

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酷評：發現昨天搞了半天，沒把佳能這次的重量級產品貼上。。。我絕對相信這個鏡頭可以給50D帶來不少銷量，雖然它看上去還是像個套頭的素質。anyway，在繼nikon的18200vr推出無數年之後，canon也有他們自己的旅遊頭啦。

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