I’m not one of those “believers”. Yes I would like to have optically corrected lenses, but those have a cost, in price, size and weight. @neuroanatomist frequently challenged those who would state that optical corrections are superior to digital corrections, but AFAIK, no one could deliver the ‘evidence’.
I can only speak from experience of the EF 11-24mm f4 lens, optically corrected, and the RF 10-20mm f4, which relies on digital corrections a.o. to fill the corners of the frame from 10-13mm and correct distortion and vignetting. When you pixel peep at corners, it is hard to tell them apart. Corner image quality of the EF lens was not it’s strong point.
The EF lens weighs 1180 gram and is big, the RF 10-20mm weighs 570 gram and is compact. I frequently left the EF lens at home because of the weight and size (it would not fit into my 40 liter backpack when filled with 2 bodies and 3-4 other lenses and filters). I know which lens I prefer.
Uses cases where optical corrections can be superior:
- Astrophotography where ‘stretching’ the image corners to fill the frame might result in distorted stars. The RF20mm f1.4 VCM shows that digital corrections without distortions are possible (see this thread by @neuroanatomist).
- Stitching panorama’s and focus stacking.
- Severe lens vignetting (3-4 stops) needs a lot ‘
burning’ ‘dodging’ to lighten the image corners. This causes noise in the corners of the image. When you need to lift the shadows of the image by 1 -2 stops, you would get 4-6 stops of brightness correction in the corners of the image. This would have a visible negative impact on image quality.
To be exact: It is Adobe Camera RAW that has the lens profiles, not Photoshop (sorry couldn’t resist

).