Cavision 4x4" Circular Polarizer Glass Filter

Priced: $74.95
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Cavision 4x4" Circular Polarizer Glass Filter -

The Cavision 4 x 4" Circular Polarizer Glass Filter reduces light entering the lens that is oriented in a single plane (polarized light) without affecting color temperature. Light reflected off glass or water, as well as some of the light emitted from the sky on a clear day, is polarized. When rotated to the appropriate angle, the polarizer can largely eliminate reflections off glass or water. Furthermore, the polarizer will reduce glare and excess sky light, thereby increasing sharpness, contrast and color saturation of the image.
The circular polarizer filter produces the same effect as the linear polarizer but (due to the light being circularly polarized before it enters the lens) does not cause interference with the lens' auto sensors. If using the auto sensor functions on a lens, this filter type is recommended.


  • Constructed from high quality optical glass


  • Clears up haze in distant landscapes and provides more saturated, vivid colors
  • Polarizing filters arrange and filter, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light
  • Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface
  • Strongest effect when used at a 90deg. angle from the sun
  • Circular polarizers are ideal for use with digital cameras and autofocus lenses where a linear polarizer will often disrupt auto exposure and focus features
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Construction:Optical glass
Effect:Eliminates reflections and haze and improves color and tonal saturation
Filter Factor:About 2.5 (1.3 stops)
Size:4 x 4" (10.2 x 10.2cm)

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