Overall, Canon’s EF 17-40mm f/4 L USM is designed to match the needs of demanding professionals and, as such, does so with ease.
Pros
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Build quality, promises only what it can deliver in style
Cons
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Limited focal range, no IS
sample images
Score
Score in detail
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Design 95
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Image Quality 85
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Performance 90
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Value 85
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Features 80