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HOYA UV FILTER - HD
Hoyas HD range is its premium range of filters. At only 1mm in thickness and hardended glass it offers the highest quality demanded by the serious photographer.
The glass in Hoyas HD filters is hardened, so at 1mm thickness it's tougher than 3mm glass
Ultra Violet rays can often make outdoor photographs indistinct and hazy. The Hoya HD UV filter absorbs the ultra violet rays, making it ideal for both fine weather photographs as well as for black and white films, while serving as a permanent lens protector.
High Density Sharp Cut UV Glass
Chemically Enhanced Optical Glass is 4x Stronger
8-layer Anti-Reflective Multi-Coating
Water and Oil Repellent, Scratch and Stain Resistant.
Wide-Angle Lens Compatible Ultra Thin Frame
Glass Mounted with High Pressure Press Technology
Hardened Glass: Hardened optical glass that has 4 times the breaking strength in ANSI standardized testing (ANSI Z80.3: 2001) where a steel balls of varying size and weight were dropped from a height of 50 inches onto the glass.
WATERPROOF / SCRATCH & STAIN RESISTANT MULTI-COATING
Specialized coatings that are not just water-proof to repel water spots but also hardened to be scratch and stain resistant. Of course these coatings are from HOYA so they are greatly reduce reflections off the surface of the glass allowing you to capture more light in your photos.
Hardened 8 Layer Waterproof Multi-Coating that is Scratch & Stain Resistant: Newly developed industry leading 8-layer multi-coating yields an average light transmission rate of 99.35% between 400 and 700nm (visible spectrum). These coatings greatly reduce reflections off the surface of the glass allowing you to capture more light in your photos. As with all HOYA multi-coatings, HD HMC is applied in a furnace at high heat, bonding the coating to the surface of the glass. This process is called "hard coating" and it is far more durable than other coating techniques. The chemistry of the top layer is formulated not just to be more durable but to be resistant to oil stains. This means that finger prints and other oils are much easier to remove.
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