Highly efficient standard 62mm 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 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.
Filter was recommended by a friend and I must say it delivered. Great for close-ups on my Nikon 105 Macro.
expensive but well-made, threads easily, polarizes well, what else can you ask for
I bought this to use on a Nikon 200mm micro lens. Worried it might vignette, but no problems there. Expected fine quality from b=w. I own five of their filters.
Worth every dollar.
Nicely mounts on to Nikon/Tamaron Lens using a Step-up (B + W Step-Up Adapter)ring.
[Use on a digital SLR.] Use mostly outdoors. Cuts haze and pops colors. Most useful to enhance the sky on landscape photos. This filter is made very well. The threads fit perfectly. The glass is multi coated to help prevent lens flare. Makes backlit shots easier. The best circular polarizer I've ever had.