Can give pictures with better clearness and color tone. Outdoor pictures for example, CPL filter can give bluer sky, whiter clouds and greener mountains.
As the result, Color of pictures taken will become more saturated.
A circular polarizing filter and can be used to darken the sky (making it more saturated and deep blue), remove reflections from water and to cut down glare in bright sunlight. The polarization is most effective when at a 90 degree angle to the sun. It can be spun around on the lens mount to increase or decrease the effect.
This filter fits lenses with 77 mm diameter only