Like its longer (but cheaper) stablemate, the Tamron 18-200mm has excellent control over chromatic aberrations in the centre of the frame, but loses it as we look closer to the corners, though less dramatically so than the 18-250mm. In terms of resolution, this lens is the least likely to become President, thanks to its unremarkable wideangle performance and marginally better-than-average resolution at the telephoto end of the zoom.
Pros
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Excellent central CA control, good telephoto resolution
Cons
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Corner CA, average 18mm resolution
Sample images
Score
Score in detail
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Design 85
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Image Quality 80
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Performance 80
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Value 85
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Features 90