Introduction Covering such a versatile focal range with a relatively small and lightweight construction, budget telephoto zoom lenses such as the EF-S 55-250mm f/4-5.6 IS STM are never going to be the best performing optics available.Tested on EOS 7D the EF-S 55-250mm f/4-5.6 IS STM achieves an overall DxOMark lens score of 11, which ranks it towards the lower end of the performance spectrum. With better performance for Distortion, Vignetting and Chromatic Aberration the EF-S 55-250mm f/4-5.6 IS STM puts in a relatively poor performance for Sharpness and Transmission, which
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