Neutral Density (ND) and polarizing (PL) drone camera filters are intended to reduce and / or filter the amount of light entering the camera. When applied correctly, ND / PL filters can make a big difference in color depth and contrast, and videos become smoother and cinematic due to an optimal shutter speed combined with recording speed (frames per second).
ND filters come in different "strengths" for drones, usually ranging from ND4 to ND64 filters, where you use an ND4 filter with little zonline (cloudy) and an ND64 (or higher) filter with extremely bright zonlin. In the Netherlands we usually use an ND4 or ND8 filter, and ND16 filter when it is sunny and an ND32 filter when it is really sunny.
A polarizing filter is a filter for your lens and increases the color saturation and reduces reflections in water features, metal surfaces and glass. Objects behind these surfaces are more visible, the contrast is increased, and it is an effect that cannot be achieved with programs such as Photoshop.
PL filters should be set (on the ground) to the direction in which you are going to make drone recordings for maximum effect. This takes time and preparation, but can give great results that are not otherwise possible.
Circular polarizing filters (CPL filters) are the most commonly used filters for. Polarizing filters can be rotated in the filter mount to achieve certain effects, such as increasing color saturation. The maximum effect is achieved when photos are taken at an angle of 90 degrees to the sun. By turning the filter, the effect of the polarization filler can be seen through the viewfinder or on the LCD screen of the camera. A second function of a circular polarizing filter is to reduce reflections in water features, metal surfaces and glass (for example, shop windows). Objects behind these surfaces are more visible through the use of the polarizing filter. An effect that cannot be achieved with programs such as Photoshop.
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