« on: August 20, 2014, 06:11:55 AM »
Canon does not let customers talk with their technicians, so that is no surprise. The tech should have got your note though, something is wrong.
They do in the UK - I always get to talk to the technicians. I've even had a long discussion in their reception where there was definitely an incompatibility between the 600 MK II I had purchased (from Canada) and the 1DX - it never focused correctly at infinity but CPS could not find a problem. v2.0.3 of the firmware fixed it.
I agree with the advice to write to them formally, and I would be interested to hear if / how they reply.
For me, sharing experiences like this, especially using Focal to check lenses, is what makes Canon Rumors useful. I'm sorry for your problems, R1-7D, thank you for posting.