Hoya 52mm HD Ii Circular Polarising Filter 

The HOYA HD Mk II series features 16 layers of anti-reflective coatings with HOYA's water repellent and stain resistant coatings making filter maintenance easy.

The CIR-PL features High light-transparency UV-absorbing polarisation film for faster shutter speeds.

• 16 layer (both sides) anti-reflection coating with superior water & oil repellent characteristics for easy maintenance
• Low profile frame with front thread to attach lens caps or other filters
• High light-transparency UV absorbing polarisation film for faster shutter speed
• Press mount technology to retain glass tightly inside the frame in case of physical impact
• Made in Japan

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

CIR-PL (Circular Polarising) filters allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. They also enable colours 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 colour balance of a shot.