I picked up a second hand 50mm f/1.2L lens recently with not a scratch on it.
I've noticed that when the lens is set to MF, the autofocus on the camera (6d) still works. As a workaround I have enabled the AF button on the back of the camera, and removed AF from the shutter button, but it seems odd to me that I had to do this. Isn't the MF position supposed to disable AF?
Is this just "how it works" or is the af/mf switch on the lens busted?