We tested the best binoculars from NOCS Provisions, Celestron, Nikon, Maven, and more to help you find the best option for ...

Porro prisms are almost always placed "outboard" of your eyepieces; that is, wider apart than the lenses you put your eyes up to. Porros are what give binoculars that classic, curvaceous "humpy ...

Left: Vintage (circa 1966) Carl Zeiss porro-prism binoculars. The Zeiss 8x50 binoculars cost $175 back then and were considered the best in the world. Right: Modern roof-prism binoculars.