[Klaus]

Ouch ....

You found the RF 24-105mm f4 L pretty good for the type of lens, when you reviewed it.

When you compare the cheap new one with that lens' Canon MTF charts, there is not a huge difference, the corners at 105mm wide open at f7.1 better than the f4 L wide open most obviously, and looking at the OL review, it is the corners that got better with the f4 L when stopping down.

To me, it seems this lens is not that "ouch" after all, if we just look at these MTF charts?

Well, at 24mm the L is certainly better and at it's surely also better at 105mm at the same aperture.