Light rays which are reflected by any surface become polarised and polarising
filters are used to select which light rays enter your camara lens.
They allow you to remove unwanted reflections from non-metallic surfaces such
as water, glass etc.
They also saturate colors and increase contrast.
Polarizers come in two variations but have the same effect. Linear
polarizers work with older camera meters; Circular polarizers are designed for
today's newer split-beam metering systems used in auto focus cameras. Check your
camera's manual.
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.
High Transparency Polarizing Film; The polarizing film is the same as that
used in the latest high definition LCD TV screens. It has 25% higher light
transmission than standard polarizing film used in current photographic filters.
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 tocapture 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
chemistryof 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.
