Hoya HD2 49mm Circular Polarizer – 16-layer HD Multi-Coated – Digital Filter Hoya

• 16-layer HD Multi-Coated Glass Filter (8 Layers Each Side)
• Anti-Reflective Multi-Coating: Water & Oil Repellent, Scratch & Stain Resistant
• High Transparency/Transmission UV Absorbing HD Polarizing Film
• Wide-Angle Lens Compatible Ultra Thin Frame
• 5-Year Limited Warranty

The Hoya HD2 Circular Polarizer Filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges, and filters, this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage. A circular polarizer only differs from a linear polarizer in that it contains a quarter wave plane in addition to the linear polarizing filter. The addition of this quarter wave plane is to circularly polarize the linearly polarized light for the use of auto focus and exposure functions. Due to how the light is broken down and filtered with a linear polarizer, auto focus and exposure accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions. This filter has an 8-layer multi-coating for very high average light transmission of 99.35%. It is constructed from optical glass and features a thin frame.

HD POLARIZING FILM

High Transparency & High Durability UV Absorbing Film

25% Greater Light Transmission than Standard Polarizing Film

HD COATING

16-layer (8 Layers each side) Anti-Reflective Multi-Coating

Water & Oil Repellent, Scratch & Stain Resistant

HD FRAME

Wide-Angle Lens Compatible Ultra Thin Frame

Glass Mounted with High Pressure Press Technology