Here we go. The $350 on full-frame in all likelihood outperforms the $1500 lens that is heavily cropped by an APS-C body. According to DxOMark, the Canon 85mm f/1.8 has substantially higher overall sharpness than the middle 40% of a Canon 50mm f/1.2 lens.[1][2]
It is true that the cheaper lens has slightly greater pincushion distortion and vignetting, however both flaws are trivially (and automatically) corrected in post processing. What can't be fixed in post is overall sharpness and depth-of-field.
It is true that the cheaper lens has slightly greater pincushion distortion and vignetting, however both flaws are trivially (and automatically) corrected in post processing. What can't be fixed in post is overall sharpness and depth-of-field.
[1] https://www.dxomark.com/Lenses/Canon/EF50mm-f-1.2L-USM-mount...
[2] https://www.dxomark.com/Lenses/Canon/Canon-EF85mm-f-1.8-USM-...