There now are straight-out "Protection Filters" made for cameras. These are just a clear filter made for no reflection/refraction so the image stays as-is. Just be sure the filter is "Multicoated" so there will be no reflections on the backside of the filter from the front lens element. As for a difference between a UV & a skylight filter- A skylight filter is usually tinted yellowish or pinkinsh to not only filter the UV rays (which film is still sensitive to) but it will also warm the image more.