VIOFO Anti-Glare Linear Polarizing Filter - CPL-400

VIOFO CPL-400 is a polarizing filter specifically designed for VIOFO dash cams to reduce glare from the dashboard and windshield. This is not a standalone camera, but an accessory that enhances the quality of your existing recording. As a linear polarizing filter type CPL, it “cuts” reflections and increases the readability of details like numbers, road signs, and markings in bright sunlight. If you often shoot during the day and are annoyed by reflections in the footage, such a filter has a noticeable effect.

What you get

By placing the CPL-400 in front of the camera lens, the filter filters out polarized light and reduces glare from the dashboard, glass, and chrome elements of the vehicle. This makes the shot look cleaner, with better contrast and fewer “cloudy” areas that otherwise hide important information. In bright sunlight and a low horizon, the difference is immediately visible – fewer burnt-out areas and more even exposure. Additionally, reduced glare also helps with video compression – the codec “uses” less bitrate for meaningless bright spots and retains more useful details.

• The filter is linear polarizing type, meaning it effectively suppresses polarized light coming from reflections on glass and paint.
• As a CPL (Circular / Linear Polarizing) accessory CPL-400, it is optimized for VIOFO dash cams and fits the designated lens model.
• By effectively reducing anti-glare, the filter makes car numbers and road signs more readable in scenes with direct sunlight or backlighting.
• A cleaner image with fewer reflections helps for better overall dynamic range, as the camera does not get “confused” by extremely bright reflections.
• The filter also protects the camera lens from accidental scratches and dust, acting as an additional front element.
• Installation is easy – you place it on the lens module and can remove it if needed, for example during night driving, if you prefer maximum light-sensitive footage.

Who it is suitable for

The VIOFO CPL-400 filter is suitable if you already use a compatible VIOFO dash cam and want cleaner daytime recordings – especially if you often drive in urban conditions with many glass facades, wet asphalt, or bright sunlight. It is also useful if you care about maximum readability of numbers and details during incidents. If you mainly drive at night and rarely during the day, its effect will be more limited, and you may only use it when needed.

The combination of polarizing effect and easy mounting makes VIOFO CPL-400 a simple but meaningful upgrade for anyone who wants their dash cam to record not just “some video,” but a clearer and more usable shot.