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lens problem: weird acquired vignetting
Brightcolours nailed it.
Peripheral Illumination Correction is Canon-speak for in-camera vignetting correction. This works *only* with Canon glass, because in order for it to work the camera must have the correct parameters for the lens in use, and Canon doesn't know about third-party glass.

This is an issue also with older Canon bodies, even my 50D gets confused when I use my Sigma 10-20 with vignetting correction active. I just leave the vignetting correction turned off and apply it in post when needed: RawTherapee has vignetting and distortion correction for most current lenses.

The RP, like other R-series cameras, applies vignetting correction in the viewfinder too, so when you use third party glass with vignetting correction active you get the same artifacts in the EVF as you get in the OOC jpegs.

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RE: lens problem: weird acquired vignetting - by olandese volante - 03-13-2021, 01:42 PM

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