This test has proved that the low-cost label so often associated with independent lenses indicates only part of their appeal. Image quality and usability are also strengths and Tamron's 17-50mm f/2.8 also manages to be surprisingly compact. The Tamron is a nice lens all-round – it's just a shame that the focusing ring rotates in AF mode yet seems not to allow manual adjustment for those occasions when the camera fails to focus on the desired plane.
Sample images
Score
Score in detail
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Design 85
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Image Quality 90
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Performance 90
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Value 95
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Features 90