I have a 5D Mark III I bought in 2013. I've had a great time with it and it's held up to a lot of travel.
After the most recent trip, some issues are manifesting that I'd like to get fixed. These things are:
- Mode dial cover missing (fell off while horseback riding with the camera in a blackrapid sling)
- Thumb stick seems to stick (ha ha) and generally not function reliably
- Thumb wheel has a 'dead spot' where it turns poorly if pressure is applied there; I assume it's a worn bearing
- Some dust in the viewfinder and focusing screen
It sounds like I can order a replacement mode dial cover, and I could probably find some way to blow the gunk out of the viewfinder, but I daren't mess with the focusing screen and the thumb stick/wheel issues almost certainly involve opening up the camera.
I can't teel if I'm best off sending the camera to Canon for the 'maintenance' package or if I should request other specific service. None of these things really stop it from being possible to take photos, but they can slow me down and be frustrating.
