Unknown. Help us by suggesting a value. (Canon EF 70-300 F4-5.6 IS II USM)
Unknown. Help us by suggesting a value. (Canon EF 75-300mm F/4-5.6 III)
The vignetting result from the DxOMark set of metrics. Vignetting refers to when the brightness of an image changes from the center towards the edges, resulting in darkened corners. A result of 0 is perfect and the image will have no vignetting.
Vignetting: is this important to you?