Filter Hoya HD Pol-Circ. 72mm

Description Hoya HD Pol-Circ. 72mm

Impact resistant optical glass Hoya HD has 4 times greater mechanical strength compared to standard optical glass, as confirmed by research by the American National Standards Institute (ANSI Z80.3:2001). Check this characteristics was carried out using steel balls of various diameters, which fell onto a glass plate from a height of 50 inches (1.27 m). Transparent polarizing film of the new generation. In manufacturing the filters of the HD series use the same polarizing film, which is used in the production of LCD screens of high resolution for modern TVs. Her transparency is 25% higher than the film used in the manufacture of other polarizing filters. Reliable 8-layer coating that ensures high light transmission filter and protection from moisture, scratches, dirt, fingerprints, microparticles of dust. 8-layer coated HD filter HMC increased the rate of transmission of visible radiation to 99.35% of (the spectrum with a wavelength range long, 400-700NM). The HD filters as filters with standard multicoated Hoya, the technology of application of HMC on the surface of the glass at high temperatures - the so-called "hard coating" which ensures its durability. The top layer HMC HD, along with increased strength, provides protection from any kind of contamination. This means that fingerprints and similar stains can be easily removed from the surface of the filter.