CONTROL REFLECTIONSSince light reflected from non-metallic surfaces polarises, the HOYA HD Mk II CIR-PL filter makes it possible to control which light enters the lens, giving you more creative avenues to improve your image.One such avenue is the reduction of reflections, for example, on water surfaces. With the HOYA HD Mk II CIR-PL, you can greatly control and remove reflections, allowing you to show the natural colours and details of submerged objects.It is also possible to reduce reflections from glass surfaces, allowing you to see through glass windows. This way, you can make out the interior of buildings ENHANCE CONTRAST AND COLOUR SATURATIONThis filter is not limited to surface light reflection control. Light waves reduce clarity and saturation of certain colours, making them appear hazed in the final photo.The HOYA HD Mk II CIR-PL also filters these light waves, greatly enhancing colour contrast, and making skies and green foliage look more defined through deeper and more natural colour tones.Specs:- Water-Repellent Coating: Yes- ND Number (Filter Factor): 2.2- f-stops: 1.1- PL Film Type: High transmittance film (by 25%)- Frame Material: Aluminium