Unfortunately due to the fact that bright light triggers some rather unpleasant visual distortions in my eyes (Visual Migraine) I am now wearing a pair of very dark Polaroid sunglasses outdoors. This means that I can't use either the optical viewfinder on the X100 or the EVF. The optical framelines "disappear" and the screen goes completely black in the vertical position. Since I photograph almost exclusively outdoors in sunlight this means that I either stop using both the X100 and my m4/3 cameras, which have the same problem with the EVF, or go back to ordinary sunglasses, which aggravate the condition. I have chosen the former so I'm now going to be using optical viewfinders only. The Leica M9 isn't a problem. so I've just ordered a S/H M8 as a backup and I'll be continuing to use the Nikon D5100, which again has an optical viewfinder.
This is quite disappointing as I love using m4/3 and the X100 but I'd rather stop using them than have the problem. Its going back to the situation before EVF's came along and I was using DSLR's. Then I could work with no problem, ensconsed behind a pair of Raybans.
I've been working with non-polaroid glasses since using m4/3 and the incidence of the visual problems has been gradually rising. The Polaroids do help, and also help with glare and general light sensitivity that I have.
So it looks like the end of the X100 and my m4/3 use. Not out of any disatisfaction with either system, but out of a desire to cut down on these sight distortions, which I've had for over 25 years. I'll console myself with the fact that I'm going to be using my Leica M9 a lot more!
If this was to be my last session with the X100 then it couldn't have been in better light. Lovely golden pre-sunset sunshine with huge long shadows everywhere.