I shoot that combo ALL the time, and it works just perfectly. If you don't know what you're talking about, keep your opinions to yourself and quit confusing the OP.
At what aperture are you shooting, and how much are you cropping @ f/1.4?
I used to own this lens, so do know what I am talking about btw.
Just because it mounts and takes a picture does not mean that it fulfills the requirements set forth by the OP. Without stating how much it vignettes at wider apertures you are the one adding confusion.