Bill, Optics Central’s resident birdwatcher and all-round optics nerd, explains prisms in binoculars. He starts with how Porro prisms which are found in the traditional shaped binoculars work. Then, he goes into more complex roof-type prisms. These roof prisms are the ones you’ll find in the more modern “straight through” design of binoculars. Binoculars, including […]
