I've used SLRs for over 30 years and every serious shutterbug adds a uv or skylight filter on the end,not only to protect the delicate lens coatings,but also to reduce blue light,the frequency that scatters the most. When I bought a rifle/scope I was amazed that the same practice does not exist among rifle folks. I have a skylight and(as I see in Stealth01's photo)a good long shade. I found a silver shade for my V16 on ebay for $7 and painted it flat black,inside and out.
The way I see it,why take the chance of scratching the multicoat of an expensive scope when you can clean a $20 skylight filter instead...and perhaps get a bit more sharpness with the excess blue light prevented from entering the scope. Works on cameras,so why not scopes? And in some cercomstances a better image of game such as deer can be had by simply adding a yellow filter. JMHO