The SharpEye Lens M55 from Fantasea Line is an accessory macro lens which fits over an underwater camera housing's lens port. It can be installed and removed during the course of the dive. The lens is great for shooting close-up images of fish, coral, textures, and more. It magnifies the subject and enables the camera to focus at short distances, allowing for very sharp images. The lens has a 55mm thread diameter for mounting onto ports with matching threads, and can also be attached to ports with larger or smaller threads using optional adapters. See Compatibility Chart.