The UV filter is used to reduce UV rays from entering the lens and striking the film. Modern lenses often have UV protection built into them as well as digital sensors, however, UV filters are commonly used to help protect the surface of the lens from scratches, smudges, dirt and other hazards.
Decrease blue cast and blue grey caused by Ultra Violet(UV) ray
Increase light transmittance, make a clearer image
Only fit for phantom 4 pro/Advanced,can not fit for phantom 4 drone.