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.

User Reviews about Canon UV-1 52mm Haze Filter

I've never really noticed UV interference or anything of the type; all I got this cap for was protection. It's made in the USA (says right on the side), it's metal, and it's well built. I did not notice any picture quality degradation, which was my biggest concern. It screws right on, and I doubt I will ever take it off (unless someone breaks the glass on it or something). It's not multi-coated, but it gets the job done just fine. -- Perfect for what it is

Not so much to talk about it. it do not have any problem , so buy it !
Good Look -- Don't have problem, so buy it

Just what I needed. Protects my Canon EF 50mm 1.8 II lens. No noticeable change in image quality. Gives protection and piece of mind. Well built. Cheap. -- Does the job well

This is a cheap way to protect a relatively expensive investment - your lens. Buy this and keep it on all the time, that way if you scratch this, you don't damage the lens. On non L lenses it has the added benefit of helping to keep dust out of the lens. -- Cheap Protection for your Lens

I bought this primarily to protect the glass on my lense. I have not done a comparison of shooting in the same situation with and without it.

I can happily say that it does a great job of protecting my lense, has a quality feel to it and does not distort my pictures.

I would buy again! -- Works well