I have an 85mm F1.8 that is still under warranty. I use it on a brand new 6D Mark II. I find that in live view the autofocus is perfect at F 1.8. However in normal mode it seems to focus just a bit short. This also happens on my T5. Have others had the same experience? Should I send the lens in for warranty service? The autofocus on the camera is fine. It is fast and sharp on my 70-200 F2.8 USM II zoom.