The Canon 52mm Ultraviolet (UV) Glass Filter is a wise initial investments. It can help protect your valuable investment from dust, moisture and scratches, which can lead to costly repairs.
Provides additional benefits of correction for Ultraviolet(UV) light which can register on film and videotape as a bluish cast and can obscure distant details
If desired they can be left on the lens at all times for protection
Ultraviolet filters allow you to correct for the UV effect to varying degrees