Porro prism binoculars are a type of optical device that uses a pair of prisms to create a compact and efficient design. They are known for their distinctive shape, which features a wider base and a more pronounced depth compared to other binocular types. This design allows for a greater separation of the objective lenses, resulting in a wider field of view and improved depth perception. The prisms inside Porro prism binoculars reflect light, allowing for a more effective light path and brighter images. These binoculars are popular for outdoor activities like birdwatching and hiking due to their excellent optical performance and relatively lower cost compared to roof prism binoculars.