The Sony 72mm UV Protector Glass Filter is a wise initial investment. It can help protect your valuable investment from dust, moisture and scratches, which can lead to costly repairs.
Sony filters provide 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.