Product Description
This filter is specially designed to be used with auto-exposure and auto-focus SLR and video cameras. It does not influence the metering systems of these cameras. Filter factor is 2. 3 to 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 polarizer placed on the lens of such a system will act as a second polarizer and block light to the meter to 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.
Remarks: OEM welcome
The MINI Company, founded in Suzhou by Amy Hu in 1998, has been manufacturing optical filters for Over 3, 000, 000 piece. Photographers benefit from our Long-playing experience in the high-quality filter manufacturing field. The MINI product range has expanded to include optical filters for scientific and technical uses.
We are now in a unique position to offer high-performance optical filters for virtually any application. Even with such a large variety of filters, we are careful to insure that each and every filter that leaves our factory meets our critical standards. Our quality control includes manual checks to insure that our high quality demands are met. MINI supplies filters to name-brand camera manufacturers and are distributed in more than 12 province of China.
