The adapter features a patented design that securely attaches to the lens position of the housing. By installing the adapter to the housing, it can modify your GoPro to accommodate most 67mm diameter external filters, macro lenses and wide angle lenses. By adapting suitable filter or lens, it breaks the stereotype of GoPro only being used as an action camera, you can make perfect use of its high resolution and image quality performance. When using GoPro on land or in outdoor environment, adapt ND or polarizing filters commonly used in general photography to capture long exposures or special effects, or use the magnifier for super close-ups. When diving or snorkeling, images will look more vibrant with proper filter installed. It can be adapted to macro lens to document fish ecology up close, and even capture amazing close-ups of marine life. It can also be adapted to wide-angle lenses to compensate for the narrowing of the field of view of the native lens caused by the underwater light refraction. Whether you are shooting GoPro on land or underwater, it is recommended to use protective housing to provide the most comprehensive protection, and avoid the risk of damage and wear of its body and lens. This patented adapter is designed to fit on the outside of the original GoPro protective housing without removing it after installation. It is suitable for a variety of applications, allows you to use the most flexible and lightweight combination to capture sharp images that used to be obtained with bulky photographic equipment!