Sigma’s 56mm F1.4 is a superb crop-sensor lens for Canon, Sony and more – it’s the best portrait lens I’ve tested in this format

​The Sigma 56mm F1.4 is the longest telephoto option of a quartet of Contemporary DC DN F1.4 primes, with an effective 85mm focal length. For me, it’s the best buy of the bunch, able to create dreamy portraits. 

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