What is lens filtre?

A lens filter is a thin piece of glass or plastic that is attached to the front of a camera lens in order to achieve various effects. Filters can be used to alter the color temperature of the image, reduce glare, or add special effects like soft focus or starbursts. They can also be used for protection, to prevent scratches or damage to the lens itself. There are many different types of filters available, including UV filters, polarizing filters, neutral density filters, and more. Choosing the right filter depends on the photographer's needs and the type of photography they are doing. Some filters can be screwed onto the lens, while others require a special holder or adapter.