Originally posted by Tom M OK - So I remove the rubber eyecup and replace it with this hard plastic cover?
Yes. You remove the rubber eyecup and replace it with the viewfinder cover. Stray light entering the viewfinder could cause inaccurate exposure readings. The
viewfinder cover is designed to keep stray light out whenever your eye isn't over the viewfinder, such as when using a tripod, holding the camera away from your eye while taking a picture, and so on.
The
hotshoe cover is designed to protect the electrical contacts from fingerprints and the elements.
stewart