The Tiffen 4.5" Circular Linear Polariser - Reflected light rays become polarised. Polarising filters are used to select which light rays enter your camera lens. They can eliminate unwanted reflections from non-metallic surfaces such as water or glass and also saturate colours, providing better contrast.nnThe effect can be seen through the viewfinder and modified by rotating the filter. The filter factor varies depending on the rotation of the filter and its orientation relative to the sun.nnIf you're walking about on a lovely day - in the mountains or at the beach - and you want to capture a superb photo of a sky filled with clouds or make the water more saturated, then a polariser is the solution. This filter is the best way to make clouds stand out, increase or decrease the saturation of the ocean, or increase or decrease reflection on water. You can also use this filter when photographing through glass or windows as it will again increase or decrease reflections.nnIf you're photographing in black and white and want to simulate a threatening storm, try adding a red #25 filter. The landscape will take on the appearance of an impending and threatening storm.nnIn addition to a UV or Skylight filter, a polarising filter should be part of everyone's equipment. It can transform an ordinary image into a creative and stunning photo by increasing colour saturation.nnNote: Linear polarisers are used with most video cameras and manual focus cameras. They are not recommended for autofocus SLR cameras.nnnFeatures:nn- This filter eliminates ultraviolet rays to suppress haze from outdoor shots and also polarises light to eliminate reflections and increase colour saturation without affecting the overall colour balancen- Can significantly enhance a blue sky and make clouds more prominentn- Used optimally at right angles to the sunn- Excellent for bringing out cloud formationsnnnSpecifications:nn- Type: Linear polarisern- Size: 4.5" circular drop-inn- Grade: Not applicablen- Filter Factor: Between 2.3 and 2.8 (approximately +1.3 stops)n- Multi-coated: Non- Rotating: Yesn- Effect: Eliminates reflections and increases colour saturation without affecting the overall colour balancen- Application: Nature, travel, outdoor photographyn- Construction: ColorCore technology