QUOTE (Frank Kolwicz @ Aug 29 2009, 11:16 PM)

Is it possible to increase the brightness of the data in the viewfinder?
No.
QUOTE (Frank Kolwicz @ Aug 29 2009, 11:16 PM)

I have a cataract that causes a lot of glare that obscures the data with bright images and there's no way to get full exposure data on the back panel LCD that I can find (unlike my much more usable XTi).
The manual tells you how to turn on this:
http://a.img-dpreview.com/reviews/CanonEOS.../lcdmonitor.jpg(or
http://www.dpreview.com/reviews/canoneos5dmarkii/page3.asp and section "Clear View 3.0" LCD monitor")
I am not sure what else shall be shown, I find this screen show anything one might want. Besides the current MLU status, of course