Canon UV-1 52mm Haze Filter

These filters are used by many photographers to protect the front element of their lens from abrasions, dust, and moisture. They also have a very subtle warming effect, which can be useful to counter the "cool" colors you sometimes get in bright sun or in shade. They're available in sizes to fit most EF lenses.

The Canon UV-1 filter for 52mm lenses absorbs harmful ultraviolet rays without increase of exposure; thereby preventing haziness and foggy effects in distant landscapes. It also has a very subtle warming effect, which can be useful to counter the "cool" colors you sometimes get in bright sun or in shade. It can be left on the lens at all times for protection of the camera's lens.