Ahh yes, rough bokeh, purple fringing, unreliable AF motor... was a lot of fun to use on my T1i back when "large aperture" was all new to me and on APS-C it performed rather well even wide open. But on FF it needs to be stopped down to the point where you'd ask yourself why you didn't settle with a zoom instead? Stopped down, the lens is indeed excellent from F/2.8 onwards, but why on earth get a fast prime which isn't so usable at it's native fast speed?
Love this lens. Really needed the ability to micro adjust on my T1i, but once adjusted on the 5Diii, it was like a having a new lens.
All images shot on the T1i
I'm confused. So are you telling yourself that your lens needed adjustment, so you adjusted it on a 5Diii and are now using it again on your T1i and think the lens is now "adjusted" via the other camera?
In any case - it's a nice lens. If it came with better build quality I would have likely never switched to the 50L. Still using a 70s/80s FD 50 1.4 with film which in fact is really the same lens still only much better built than the plastic EF cousin.
5DII - 50L - 135L - 200 2.8L - 24-105 - 580EXII - 430EXII - FD 500/8 - AE1-p - bag full of FD lenses