The polarisation filter is a must for top-of-the-range outdoor photography that does not require any software. It not only adds colour to saturation and fullness, but it also reduces glare from non-metallic surfaces such as glass, snow or water. Or, add the intensity of the light focused on the lens. Just turn it and then adjust the polarisation effect immediately. It will bring perfect results even on a sunny day, when it can darken the sky to a more natural blue instead of brightening, which can also highlight the clouds. It is perfect for holidays by the sea, in the mountains, or for pictures of architecture and landscapes with an impressive sky. This version is for 49mm lens filters.