Canon EF 20 mm f/2.8 USM
6. Distortion
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If neither the resolution nor chromatic aberration results were outstanding enough perhaps at least low distortion will provide a strong argument for buying the Canon 2.8/20 mm? Proceeding immediately to the facts we can say that the tested lens showed moderate but visible barrel distortion which level was measured as –1.5%.
Once again this value is lower than in the case of zoom competitors but just slightly. The difference is visible when you look at the measurement numbers but it would be very hard to notice in pictures.
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