I sent my 50L into CPS Canada last week to get an issue with off-center focus addressed.
Now to be honest, I'm not sure if there was something really wrong with the lens or not, given how notoriously finicky this lens is. Im going to pick it up from the courier depot this afternoon (missed delivery yesterday) and try it out.
Sadly, they don't appear to have provided any communication as to what they found, or what they did, if anything.
Is this normal? Is there any way I can find out?