Erich, I tried to slip the rubber eyecup on the 8008s as well, and I experienced the same damage to the viewfinder that you did. The eyecup certainly looks like it is supposed to be slipped on, but it does not fit that way. I then learned that you must unscrew the DK-7 adapter from the 8008s, put the eyecup over the adapter, and then rescrew the adapter into the camera. This works well. I don't know why Nikon could not have included these simple directions along with the eyecup. Hope this helps. Miles > i just bought an 8008s and it had a rubber eye cup with it. I tried > to slip the eyecup on but it would not go. > <SNIP> > As it is there are some slight indentions on the plastic rim of the > viewfinder where the metal ring of the eyecup dug into it a little > when I was trying to install it. > <SNIP> >Erich T. Ritzhaupt