Function: Filtering the light; If the light is too strong, it will affect the video image; While using a filter can reflect the strong light.

How to adjust: Install the CPL filter on the camera lens, slowly rotate the aperture ring, while observe the polarized light of the object from the viewing frame, until it disappear or reduce to the effect you expect. Put the CPL filter in front of your eye, slowly rotate the aperture ring, while observe the polarized light of the object, until it disappear or reduce to the effect you expect and keep the position.