Central sharpness is very good at f/1.8 and f/2, excellent from f/2.8 through ... The taller the column, the better the lens performance. CA (Chromatic Aberration) is measured with any in-camera ...

Telephotos especially benefit from hybrid optical and in-body stabilization, a feature exclusive to RF lenses. Canon has a few years of development behind the system, but there are still lenses ...