Sigma 18-35mm F1.8 DC HSM A

The Sigma 18-35 mm F1.8 DC HSM A lens has some impressive sharpness score, even beating the Canon EF 24-70mm F2.8L II USM!

The only things lacking is the focal range and stabilization. See the article from DxOMark below:

Sigma 18-35mm F1.8 DC HSM A Canon mount lens review: fixed focal length quality in a zoom?.

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