Richard G
Veteran
I`ve used a J11 and have and use a 135/4 Canon Serenar .
Can`t say that I`ve found focus to be an issue but there is a curious disconnect with the suject at that FL on an RF.
I`ve never heard anyone mention it before so it may be just me.
I agree with the disconnect. I enjoyed a revival of my Tele Elmar f4 when I bought a SHOOC external 135mm finder which I will use on my M6 as well as the M2. The image is vivid and intimate for framing the shot. Great lens. Great finder.