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.

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.

Light rays which are reflected by any surface can become polarised so polarising filters are used to select which light rays enter your camera lens.

CIR-PL filters allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc.    They also enable colors to become more saturated and appear clearer with better contrast.

This effect is often used to increase the contrast and saturation in blue skies and white clouds.

HOYA's polarising filters do not affect the overall color balance of a shot.

Also serves as a permanent lens protector.