Erik Ohlson: A "protective" filter is a chimera - a waste of time & money, adding 2 more dirt-catching & reflective surfaces.
Ask yourself: "Why don't the camera designers put a flat glass in front of their lenses.
I haven't used or missed such things in over 60 years of photography.
Canon often does
MiamiStephen: Please, unshackle your readers from having to cycle through all of the pages to get to page 5, and then cycle through all of them again to get to page one. This new format is the first "improvement" that fails completely. I'd rather read a review of a film camera.