11-09-2020, 08:01 AM
There must be an issue with the lens (or camera if it is softness from OOF), as other reviews of the lens do not note AF or softness issues.
https://www.photographyblog.com/reviews/canon_rf_100_500mm_f4_5_7_1_l_is_usm_review/conclusion
https://www.cameralabs.com/canon-rf-100-500mm-f4-5-7-1l-is-usm-review/2/
https://www.photographyblog.com/reviews/canon_rf_100_500mm_f4_5_7_1_l_is_usm_review/conclusion
https://www.cameralabs.com/canon-rf-100-500mm-f4-5-7-1l-is-usm-review/2/