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Okay boys - here it is...
"Peripheral Illumination Correction is a feature that's actually a lot simpler that it initially sounds. Basically it corrects the unwanted effects of vignetting, typically seen in wide-angle photos in the corners of the frame. The 7D contains a database of correction data for various Canon lenses and, if Peripheral Illumination Correction is enabled, automatically applies it to JPEG images. For RAW images the correction is applied later in the Digital Photo Professional software."
Länk: http://www.photographyblog.com/reviews/canon_eos_7d_review/
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