See my L-mount mirrorless wishlist
Whenever feasible, I like to cover the zoom range with some reference set of evaluations, because the use of a zoom lens usually involves compromises somewhere. The 99mm focal length fills out that picture for the Panasonic LUMIX S 24-105mm f/4 Macro OIS, completing the series.
This page looks at performance of the Panasonic 24-105mm f/4 Macro OIS at 99mm on a demanding planar (flat) target at medium distance. This particular subject lays bare all lens weaknesses, but particularly micro contrast across the frame.
Panasonic 24-105mm f/4 Aperture Series @ 99mm: Mosaic
Includes images up to full camera resolution from f/4 through f/11, along with large crops showing the behaviors.