https://www.ephotozine.com/article/canon-rf-24-105mm-f-4l-is-usm-review-32799
Generally positive. The MTFs can be compared with those of EF 24-105mm f/4 L II on 5DSR https://www.ephotozine.com/article/canon-rf-24-105mm-f-4l-is-usm-review-32799 The 5DSR combo outresolves the R system because of the higher resolution sensor and absence of AA-filter and so it is difficult to make direct comparisons. But, the EF seems relatively much sharper at the edges at 105mm.
Generally positive. The MTFs can be compared with those of EF 24-105mm f/4 L II on 5DSR https://www.ephotozine.com/article/canon-rf-24-105mm-f-4l-is-usm-review-32799 The 5DSR combo outresolves the R system because of the higher resolution sensor and absence of AA-filter and so it is difficult to make direct comparisons. But, the EF seems relatively much sharper at the edges at 105mm.