CPL filters explained – enhance colors and reduce reflections

Do you want more depth in the sky, fewer reflections on water surfaces or richer green in the landscape?
Then a CPL filter—also called a polarizing filter—is the perfect tool. In this guide, you'll learn how a CPL works, when you should use it, and why the magnetic CPL in the LC-PRO 100 filter system from Filterfotograf is particularly practical.

What is a CPL filter?

A circular polarizing filter (CPL) filters out certain light waves caused by reflection or scattering—e.g., from water, glass, or damp leaves. This results in:

  • Reflections reduced
  • Colors more saturated
  • Contrasts enhanced
  • Clouds more plastic

Typical applications for polarizing filters

  • Water: Anti-reflective surface, visible to the bottom
  • Sky: Enhances contrasts and shades of blue
  • Forest & Leaves: Removes shine on wet leaves, more intense colors
  • Architecture: Reducing reflections in glass facades

What you should pay attention to

  • Angle to the light source: The effect is strongest at 90° to the sun
  • Rotation is crucial: CPL must be adjusted manually
  • Caution with wide angle: Uneven sky effect at less than 24 mm

LC-PRO 100: CPL filters simply snap into place magnetically

In the LC-PRO 100 filter system, the CPL filter is magnetically attached and can be adjusted laterally – even with ND or GND filters mounted. This means:

  • No filter thread required
  • Polarizing filter can be rotated with just one hand
  • Full control even in cold weather or with gloves
  • Can be used decoupled – even without rectangular holder

To the LC-PRO 100 starter set with CPL

3 practical examples

  • Lake with rocks in the foreground: Without CPL: reflection, no detail. With CPL: view to the bottom.
  • Sunset on the beach: With CPL: Golden colors, hardly any shine on water
  • Forest after rain: CPL reduces glare on leaves – more depth in the image

Combine with ND or GND filters?

Yes! The CPL is often the basis. You can use it with:

Care and cleaning

A clean CPL is crucial for clear images. Use:

Conclusion: The underrated classic

A good CPL filter is one of the most effective tools in landscape photography. With the magnetic LC-PRO 100 CPL filter, you have the perfect tool for better colors, less glare—and complete control over your image.

Discover & try CPL filters now