This is my first post in the forum so please be gentle with me.. I have been reading through the forum for the past six months tracking the slow progress of the 1DX and other things that have caught my eye during this time..
Now comes the sad part for me, as I was playing around with my new toy today I was taking some pics of my 3 year old black lab playing with a coiled pipe.. I got some great shots as she was jumping on this pipe right up until I got a mechanical error... I didn't think much of it as I thought it was a firmware issue. Removed the battery fired it back up fine, go to look through the viewfinder to see a weird looking line across... So I took the lens off and BANG out fell the focus screen on to the floor so now I have a scratched dirty focus screen.. I tried compressed air to knock off anything before placing it back in the camera but its not good... I feel a little miffed, Im going to contact CPS tomorrow and see what they will do.. I should have photographed it with one of my other bodies before I did anything, now I feel like they might turn around and say I have to pay for the repairs
Anyway sorry that was such a long intro to me, hope to hear back
Alex, Welcome to Canon rumors. I'm sorry to hear about the focus screen, it is probably not a big deal.
Indeed, it might have been you accidentally releasing it.
The focus screen will drop down if you happen to press the tiny release tab for it at the top of the mirror box. If you miss seeing that happen, it will drop out and get dirty.
The good news is that a new one is relatively cheap, they come as a kit with a tool to remove and install them. Its a easy job you can do yourself.
Forget cleaning one, its a waste of effort.
In the USA, dealers sell the stock screen for about $35, but in the UK, they might come more dearly. I'm not sure if the 1D X stock screen is the same as the older models, I know that some of the older ones mess up exposure if used in the 1D X due to the new exposure system.
See pg 327 of your manual.
Installation instructions come with the replacement focus screen.