Camera lens filters are thin layers of glass which help to develop the quality of the picture by reducing the glare and increasing the saturation of the picture. Normal filters include UV (ultra violet) filters and haze filters which protect the lens of the camera and give it longer life.
It depends upon the time and need for choosing a camera filter. A very good photographer would definitely have a couple of camera lens filters always in his bag. Be it a still picture or a video, these filters bring out the maximum from the quality of the picture. There are different types of camera lens filters. There are the Linear and Circular Polarizer, Neutral sigma lens sale Density Filters, Graduated Neutral Density Filters, UV / Haze filters and Warming and Cooling Filters. These filters are used under special conditions only. For example, The Linear and Circular Polarizer Filters are used to take photos or videos with less glare and improved saturation. This commonly means that they help to take pictures of the sky or the water or some foliage in landscape photography with lesser glare and enhanced saturation. The Neutral Density Filters are a great help while taking picture of waterfalls or a river which is under bright light. These filters help by extending the exposure time of the lens. Like this all camera lens filters have different uses.
But using these filters without the need may adversely affect the quality of the picture. There might be a dull color tint wholly or partial or there might be more of a glare entering into the lens resulting in a very bright picture.