Canon EF-S 18-135mm f/3.5-5.6 IS STM lens review at Camera Stuff Review

Ivo Freriks tests the lens with a Canon T4i/650D Dslr body, and discovers that these two make an excellent combo, especially when video shooting comes to play:

"Optically, the Canon 18-135mm zoom lens STM is slightly better, but not much different than its predecessor. The main differences of this review compared to the Canon 18-135 mm review that we have previously published, is the improved performance for chromatic aberration and vignetting. And these improvements are caused by the in-camera lens corrections made by the Canon 650D.

The major advantages of this lens are great zoom range, which is combined with compact dimensions, light weight and fast, quiet autofocus. The Canon 18-135 mm STM is clearly designed with video in mind. The combination of the new phase AF detection of the Canon 650D with the stepper motor is a tremendous progress. The built-in image stabilization is very effective and switches on automatically when necessary during video, which will improve the quality of many amateur video recordings."

Pros

Compact and lightweight
Large 18-135mm zoom range, suitable walkaround lens
Fast continuous phase detection AF video with Canon 650D
Insensitive for flare
Highly effective built-IS
Silent stepping motor ideal for video

Cons

High distortion
Visible chromatic aberration in RAW files
At the extreme focal lengths (18 and 135 mm), the corner sharpness lags behind the center sharpness

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