Made custom by me!
Do you backpack with your camera? What about in the rain? Most backpacks are only marginally waterproof. You need a pack cover if you hike in the rain.
I'll make you a pack cover using this silicon impregnated super slick midweight ripstop nylon in a "Woodland Camo" pattern, within a reasonable size (daypack up to multi-day pack) for $30.