Reviews and Problems with Canon EF 70-200mm f/4L IS USM
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Canon EF 70-200mm f/4L IS USM Review
What Digital Camera
20 February 2013
Summary: Overall, the f/4 lens clearly plays second fiddle on paper but it is a very easy lens to carry and to use. Though it is expensive it is only roughly half that of the f/2.8 version, based on Canons SRPs.
Summary: Canon EF 70-200mm f/4L IS USM is clearly one of the best EF mount telephoto zoom lenses available on the market. The lens shows outstanding image quality with particular strength in the 70-135mm range.
Excerpt: Gary Wolstenholme takes a look at how this compact telephoto zoom lens performs. Canon's EF 70-200mm f/4L IS USM costs around £800 and has an Image Stabiliser, silent Ultrasonic focusing with full time manual override and is sealed against dust and moisture.
Pros: Excellent optical quality, Superb build quality, Very effective image stabilisation, Fast to focus, Sealed against weather and dust, Light weight
Cons: Sometime miss-focuses near minimum focus distance
Conclusion: The EF50/1.2L is a totally new optical design (there was an old FD 50/1.2L) and uses a molded aspheric rear element (the 50/1.0L used two very expensive ground and polished aspherics). It has a true ring type USM motor and a high speed CPU for fast focus.
Excerpt: It's the IS in the name that distinguishes the Canon EF 70-200mm f/4L IS USM from the cheaper 70-200mm f/4L USM. The lenses are virtually the same size and shape, but the more expensive of the pair comes with built-in 4-stop image stabilisation (IS).