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B+W 72mm Circular Polarizing MRC F-Pro Filter

Grade Notes Price Qty
With Case

* Item pictured for illustrative purposes only, actual item not pictured.

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B+W 72mm Circular Polarizing MRC F-Pro Filter Description


B+W Filter - CPL Filter - 72 mm Attachment

Highly efficient standard circular polarizing filter for all cameras with beam splitters in the light paths of their TTL exposure meter and with autofocus lenses. Circular polarization has the same pictorial effect as linear polarization, but allows for proper exposure metering and/or autofocus distance settings.

B+W Polarizers increase color saturation and reduce reflections. The neutral gray color and plane parallel polarizer material guarantee optimal image results. High-quality optical glass ensures excellent pictorial quality. The filter factor varies according to how the filter is positioned in relation to the sun. Filter factor is between 2.3 and 2.8.

Linear and circular polarizers both consist of a linear polarizer foil but differ in their construction in the following way. Modern SLR cameras have have a beam-splitting prism that sends part of the incoming light to the meter and part to the viewfinder. The effect is that the light entering the meter is partially polarized by the beam-splitter. A linear polarized placed on the lens of such a system will act as a second polarizer and block light to the meter by a degree dependent on the angle between the prism and the polarizer on the lens. The result is incorrect exposure/aperture values from the meter. The circular polarizer circumvents this problem through the addition of a 1/4-wave retarder, or delay, foil. This ensures that the linearly polarized light is changed into a rotation that appears unpolarized to the meter, resulting in proper exposure/aperture readings.

KEH Specifications

  • Size:   72mm
  • Type:   Circular Polarizing F-PRO MRC
  • Mfg:   B+w


Physical Characteristics

Material Brass, Glass


Application/Usage Camera/Camcorder, Lens

General information

Manufacturer Part Number 66044843
Packaged Quantity 1
Manufacture GTIN 0012240448436, 4012240448432
Brand Name B+W

Technical Information

Filter Type CPL
Filter Attachment Diameter 72 mm

Customer Reviews