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.
Why buy from us?
We are proud to offer the outstanding
service and quality state-of-the-art products that our customers have come to
depend on. Below are just a few of the many reason to buy with us.
Inventory Our excellent supplier relationships, coupled with
technologically advanced super-efficient systems ensure that we usually have the
products you want IN STOCK so that you can get what you want when you want it.
Our super-fast turn around time is such that most orders are processed and
shipped within 24-48 hours, and often a lot quicker.
Prices Why pay more when you can get the same for less? Due
to our large sales volume, we are able to pass our quantity buying prices on to
you. When you purchase from us, you can rest assured that you are getting
factory fresh merchandise with A Warranty at the lowest legitimate
Service We strive to ensure all of our customers receive the
highest of service. We listen to your feedback and do what we can to tailor our
service to your needs.
Safe Transactions Ordering with42nd Street
Photo is safe, easy & fun. We assure that
every transaction you make with us is 100% secure. In addition to using Secure
Sockets Layer (SSL) protection technology and a VeriSign Secure Server ID, we
are also checked daily by an independant security company called ScanAlert. You
can also be assured that your name and confidential information will never be
distributed, sold, or rented.