Whenever you use a UV filter, you actually add a new optic layer to your lens where light can be reflected and refracted. It helps cut down the amount of haze and increase the contrast on film. So get this UV filter from Canon, as it allows you to correct the UV effect to varying degrees.  UV Coating This filter features a UV coating that helps absorb ultraviolet light and decrease the bluish cast of daylight. It does not have any additional coloration or contrast, thereby allowing you to pair it with different lenses. Protective Filter This filter helps protect your lens against dust, moisture, fingerprints, scratches and other damages. You can also leave it on your lens at all times, as it helps provide an additional security during accidental drops. It fits lenses with a 52 mm diameter. Improves the Quality of your Images Whether it is the sand or mud blowing, this UV filter will stop it from sticking to the glass. It can be easily and quickly removed and cleaned and also helps improve the quality of your images.