Originally posted by cfraz Interesting. Just curious how a lens correction profile can improve sharpness.
I guess it's a mixed bag, depending on the distortion of the lens. The distortion correction process would result in some areas of the image being slightly stretched and others slightly compressed. The latter could improve the perception of sharpness in that area. The former, however, will result in some additional blur in the affected areas. Next to that, removing colour aberrations that are especially visible on the edges of subjects, would probably increase perception of edge sharpness and improve contrasty texture?
Hence I can see a profile can improve things, though I think it would be limited to subtle changes only... A blurry lens will never become razor sharp thanks to a profile. At least I have never seen this... My DA21/3.2 in any case doesn't noticeably improve after application of the Lightroom lens profile.