Using a Polarizing Filter to Depict the Sky in a Deeper Shade of Blue

When the colour of the sky is dull, it will appear vaguely blue with low contrast. In such cases, a polarizing filter, or PL filter for short, will help make the sky appear a deeper blue. The key to successfully depicting the deeper colour is in the direction the camera faces, and in the rotation of the PL filter. In this article, we use examples shot with an EOS 750D paired with an EF-S10-22mm f/3.5-4.5 USM.

Example shot with EOS 750D

EOS 750D/ EF-S10-22mm f/3.5-4.5 USM/ FL: 15mm (24mm equivalent)/ Aperture-priority AE (f/8, 1/320 sec)/ ISO 400/ WB: Auto

Rotate the PL filter to bring out the desired effect

Shooting procedure diagram

*Shooting Procedure
A: Attach the PL filter to the lens.
B: Shoot with direct light.
C: Rotate the PL filter and check the result to see if you have obtained the desired effect.

A PL filter removes unnecessary reflected light and brings out a colourful finish with high contrast. By using this filter to capture blue sky, you will be able to depict the sky in a deeper shade of blue.

To use a PL filter, attach it to the front of the lens. Select a filter that matches the diameter of the lens, and turn the filter to screw it in place into the screw threads.

During your shoot, select a direct light source when composing your images, and adjust the filter effect. The PL filter has 2 layers, for which you can create a stronger or weaker effect by turning the frame at the front. Accordingly, the blue sky will be depicted in a deeper or lighter shade, and you can use Live View or the viewfinder to find the angle at which you can obtain the deepest shade of blue.

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