Hi Dave,
Not Scott, but I have experience with both, or rather all three.
I always hated the EF 24-105L versions, basically because the difference between WA and tele was too much, the corners didn't hold up, and in low contrast, low light situations IME the images got rather mushy, too much so for my liking, especially at the longer end. The Mk I I sold about a year after acquiring it, the Mk II I had on loan for testing and returned it when done. The only redeeming factor it had IMO over the Mk I was lower distortion, especially at the WA end. Otherwise they were the same AFAIAC.
As a result, the RF version I was a little hesitant about, but I needed something in that range urgently, and got one with some trepidation. Fortunately, I did not need to worry after all, as I have never felt the need to look back in the period I have it now (a little over a year). It is significantly sharper than any of the EF versions. Distortion is about the same as the EF Mk II version, but most importantly it is also much, much sharper at the edges and in the corners of the image. It does not suffer from mushiness in lower contrast, low light scenes either, not at all. It is equally excellent under all circumstances, and it happens so that my first shoot with it did indeed cover, a.o., low contrast, extremely low light scenes
.It has a little more vignetting wide open, but that is easily corrected, if the camera doesn't do it for you already (jpeg of course).
Overall, it is more than a worthy upgrade, and IMO absolutely a keeper - I will hold on to it for sure! For a change, it is worth the L-moniker, unlike its EF brethren. That's my opinion of course, but it truly is significantly better, and for a change I enjoy shooting with a 24-105
. Oh, funnily enough it currently is cheaper than the EF Mk II over here ....HTH, kind regards, Wim
thanks for that - toying with the R5 when its generally available and wondering if my EF (mk1) is worth keeping or go for the RF, think you've convinced me to go the whole hog!





