At this ground glass screen you can not get when you're working a lot with manual focus, so the photographic potential of the shallow depth of targeted exploits (macro, telephoto, a fast lens at wide-open aperture). After installation you can see not only times much change, the viewfinder is not the way, much darker. When shooting you quickly realize that you can see much more reliable, where the focus really sits. I no longer miss the cut image-Anzeiger my old analog SLR. At the price I have no criticism, that's clearly a precision optical part.
The replacement of the focusing screen comes with the supplied "pliers" easy. Best you look at but previously on Youtube the video "Canon CPN - Changing the focus screen EOS 40D, 50D, 5D and 1D series", which shows him, step by step. Have fun with it!
