Welcome to the store! The semi-circular spherical dome pushes away the water surface, allowing the lens to have a sufficient field of view, enabling photos of both above and below the water, providing a fantastic shooting experience and capturing amazing shots. If you only use a simple camera for half-underwater and half-above-water shots, it's difficult to get good results because water obstructs the perspective, underwater objects are distorted, and water magnifies objects like a convex lens. Therefore, to balance these elements, you need a DOME PORT. The semi-circular spherical dome pushes away the water surface, allowing the lens to have a sufficient field of view, enabling photos of both above and below the water, providing a fantastic shooting experience and capturing amazing shots. Water magnifies objects within it like a convex lens. Direct shooting will result in distorted and larger underwater objects. Compared to objects on the water's surface, the images taken this way are highly inconsistent. Using a DOME PORT can effectively coordinate underwater and surface objects, ensuring your photos appear natural and true to life. Color: Black Material: Plastic Package Contents: 1 * Fisheye Lens Cover (Only the above package content is included; other products are not.) Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you encounter any issues after receiving the product, such as damage or incorrect quantity, please contact us immediately, and we will provide you with the best solution!