I mean the in camera options on the sony FX3. Vignette correction which brightens the corners, and distortion correction which corrects barrel and pincushion distortion by reading the lens data. Cinema cameras dont usually have these options, but lenses tend to be higher quality in the first place. But ive noticed that when i enable distortion correction it can look unnatural stretching the image. Not sure if its just how a more rectilinear lens would look, or an artefact of the correction.