If you want something handy yet powerful, a set that you can put in a small box and take away, this wide-angle kit is the right option. Also it can be extended to other accessories easily, making it the most popular kit ever. ◎ The wide-angle lens not only correct the underwater image distortion with an extraordinary capability, but also expand the view greatly. ◎ Red filter corrects the color in the ocean, to make the image vivid and colorful. ◎ The wide-angle lens can be either attached on the red filter, or used separately. ***1 year warranty dose not cover customer damage***