And therein lies Canon's marketing prowess. They aren't going to force you to switch over to mirrorless, the're going to make you want to...I had a go with the RF50 yesterday and my god what a lens! I’m buying for sure! The IQ at 1.2 is almost not rivaled by anything larger than f2.0 in any lens ever. It’s amazing.
And I did not notice a lot of vignetting at all, so I don’t know how TDP got theirs to show four stops. I say it’s very close to the 85 f1.4 L.
And the lack of aberrations even in the extreeeeme cornes is crazy. It’s sharper at 1.2 by quite some bit than my 35 L II... AF is instant and so certain. It made my 85 L IS seem like a toy. Also much lighter than I expected.