A circular polarization lens (CPL) filter, manage and reduce the glare from reflected surfaces.
The CPL filter placed in front of the dashboard camera lens in order to darken skies or in bright sunlight, this filter able to manage the reflections and conquer glare from the surface of lakes or the sea.
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A Photographer always going frustrated when shooting in nature has to do with lack of color. This causes because sunlight gets bounce all over the atmosphere which of course reduces the real beauty and colors of nature which resulted in the bland photographs. A circular polarization lens (CPL) filter could further reduce such as unwanted light, reflections or color to a certain extent from a windshield, getting more saturated and beautiful photographs and videos. A polarizing filter can also help in reducing atmospheric haze.
So here’s how to setup a Dash Cam CPL Filter :
1. Attach CPL filter to mount – Although there are various types of filter available on the market, the most popular is the circular model, a circular polarizer is very easy to use, choose partly as it can fit easily onto the end of virtually any camera lens. All you need is a dash cam with a CPL filter mount and a filter of the corresponding size.
2. Place a white piece of paper on the dashboard so you see it reflected in dash cam footage
3. Turn filter until reflection disappears, or is minimal – Its an ideal set-up recommended for use CPL filter on the lens.
4. Remove filter when recording at night – When you’re shooting in the dark of night, it’s most likely that you’ll want to get as much light as possible into your lens. A polarizer is going to reduce the amount of light and color the video footage will turn out darker than usual which obviously isn’t ideal, so always do remember to remove the filter when recording at night.