Peripheral illumination correction

is a darkening that can occur in the corners of your image, Canon calls this…peripheral illumination or falloff.…Vignettes most often occur with wide- angle lenses and sometimes a vignette can…add a nice effect to an image.…It can bring focus to the center of the frame.…But most of the time you don't want vignettes in your image and your camera has…a feature to remove these when you're shooting in JPEG mode.…The camera removes vignetting by applying a brightening to the corners.…And if it ever gets its calculations wrong or if it's a little too aggressive…with its de-vignetting, or its peripheral illumination correction, you may…want to turn it off.…

Or, maybe you actually want some vignetting in your image.…Maybe you're intentionally trying to vignette to get more focus to the center of your image.…Right down here in the first shooting menu is Peripheral…illumination correction.…Hit that and I can just Disable it.…Now notice though it's giving me some information here, Attached lens and it's…