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.
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Returning an item
H and B Digital offers an exclusive 15 days exchange/refund policy, if an item is still in new and unused condition.
All returns require a Return Authorization (RMA) number, which you can obtain by email or you can call 212-354-1341. Please note: An RMA number does not guarantee final disposition. All returns are subject to inspection.
All exchanged or returned merchandise must be in Original Factory Condition, including all packaging materials, inserts and manuals, warranty cards (not filled out), and accessories. Please do not tape or write anything on the item or packaging. We will charge you for replacement of damaged, altered, missing, written-on, or taped-on contents or cartons. We reserve the right to refuse any such returns.