>>3840771>Vignette effects sharpness... Surely you know that?Absolutely untrue, Sigma scarified on vignetting and distortion on their 85mm f1.4 DG DN Art for sharpness, size, weight and cost. With the high dynamic range of recent e-mount cameras both of those negatives are easily correctable. Vignetting and sharpness are not correlated, lens designers can forego correcting one to improve on the other