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CPL, The Filter That Can’t Be Replaced By Post Production

Filter is one of most used accessories in photography. Though some of them can be replaced by the editing of software, there are still some irreplaceable, such as the CPL.

CPL

A circular PL filter can erase the reflector light of glass, water, or the stray light of the sky. By doing this, the color saturation is increased, so the sky is bluer and the glass is greener. Though we can also change the color in editing software like Photoshop, but the erasing reflector feature is irreplaceable.

 

This is the comparison of with and without filter for glass in sky and glass photography.

 

Without polarized filter

glass without pl

With polarized filter

glass with pl

Without polarized filter

sky without pl

With polarized filter

sky with pl

How to use polarized filter?

Let me show you step-by-step in pictures.

install pl

install pl

 

install pl

Why the sky is still not blue after using CPL? First, you may not turn it into the right angle. Second, the sky is dust. Filter can change dust into blue. The polarized filter can be used as the ND filter if needed, though not perfect.

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