I have been traditionally used to monitor covers! Now, D 850 is with a touch screen and it needs some kind of protection like any smartphone touch screen protector!? Otherwise, like any car door handle, there is going to be lots of scratches on the touch screen by the finger nails and also due to spectacles!? Also, it is going to be smudged soon by nose grease, sweat and dust especially in a hot, dusty, humid tropical country like India!? I wish they seen come out with some protection sticker at least!