Overall, this lens is not quite as consistent as the 14-54mm zoom, but does offers more of an extended zoom range. The 14-54mm is probably the better lens but the 12-60mm is more versatile.
Pros
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Lovely feel, useful 5x zoom range, great image quality
Cons
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Low CA does not always mean high resolution
Sample images
Score
Score in detail
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Design 90
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Image Quality 90
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Performance 95
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Value 85
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Features 90