After an accident with my Canon 400mm F2.8 L IS USM a couple of weeks ago, the lens mount needed replacing. Seeing as Canon won’t touch it, nor most of the repairers I have contacted, I decided that if I could find a lens mount I would do it myself. Now Canon haven’t supplied service parts for this lens for a while, and if they did they wouldn’t supply them to an unauthorised repairer like me.
Fortunately for me Google turned up a saviour in https://www.eurohitech.com. I ordered the part with not a little nervousness, a) because it was £180 and b) I had never dealt with them before. Anyway two weeks later I am holding the replacement part in my grubby little hands, Thanks Sushil.
So time to crack on, it is a really simple job, just a little fiddly. PH000 & PH00 & PH0 screw drivers, and a plastic tray with a magnetic screw holder and a small plastic pry-bar (spudger) is all that you need. Firstly it may be a good idea it mark the correct orientation of the mount, I used a black marker pen and marked the position of the lens lock receiver, on the body of the lens, next thing is to remove the baffle, which on this lens is held with 3 small screws (a lot of the budget lenses they just lever out), then three more screws to disconnect the electrical contacts. Undo the 4 main screws and away the mount comes, complete with rubber weatherseal.
The reinstallation is simply the reverse procedure.
***UPDATE: All tested and working perfectly, so will be used for shooting football tomorrow & Sunday, Yay!***