New Professional 49mm CPL Filter Works with any lens with a 49 mm filter thread; manual or autofocus. CPL filters (Circular Polarizer) are great for removing unwanted reflections from non-metallic surfaces such as glass or water. Take richer scenic shots and notice improved clarity in distant objects by Makes a Blue Sky Bluer Enhances Clouds Eliminates Reflections Introduction: A polarizing filter is often placed in front of the camera lens in photography in order to darken skies, manage reflections, or suppress glare from the surface of lakes or the sea. A Polarizing Filter, used for both color and black-and-white photography, is colourless and does not affect colour balance, but filters out light with a particular direction of polarisation. This reduces oblique reflections from non-metallic surfaces, can darken the sky in colour photography (in monochrome photography colour filters are more effective), and can saturate the image more by eliminating unwanted reflections. The main function of the Circular Polarizer filter (CPL Filter) is eliminating the scattered light in the air,as well as the reflected light of the metal ,glasses and liquid.It is only allow the parallel light through the lens only,so that the camera can get a better picture such as blue sky,white cloud,clean water and so on. When you rotate the CPL filter in its mount, the effects will show up immediately. Function 1) Sky-the color of sky can change remarkably using a polarizing filter. 2) Water-When shooting a picture of water with polarizing filter, cut out glare and even change the colour of the water, making the water look crystal clear and a bright blue color. What does it do? Darkens Blue sky Reflected light from not metallic surfaces is polarized and a circular polarizer can reduce or eliminate these reflection depending on the angle of your camera to the reflection. When photographing around water, a circular polarizer reduce the reflection to for deeper colors and to see more of what is beneath the surface. Leaves have a shiny side that is generally facing up or out, this shine can reflect a lot of light reducing the color saturation of the plant. A circular polarizer reduced the shine and allows the leaves natural colors to be seen and captured. This applies to days that are sunny or cloudy. We’ve all seen lots of reflections off windows and other glass. A circular polarizer reduces or removes the reflections to see what is on the other side. Something that cannot be done later in any editing software. Taking a photo of a house or car? Most paints are shinny and reflect more light then needed, which in turn lightens or washes out their color. A Circular Polarizer reduces or removes the reflections for better color. Brand No Brand SKU 101058006_NP-1021594086 Filter Attachment Type Screw-On Water Resistant Yes