Roof prism binoculars are a type of binoculars that use a roof prism system to create a compact and straight-line design. This allows for a slimmer profile, making them easier to hold and carry. They are popular for outdoor activities like birdwatching and hiking due to their lightweight construction and portability. The roof prism system typically includes either a Porro prism or a Dach prism, which helps to invert and revert the image while maintaining a compact size. These binoculars often feature multi-coated lenses for improved light transmission and clarity, enhancing the viewing experience in various lighting conditions.