Roof Prism System
In roof prism binoculars the prisms overlap closely, allowing the objective lenses to line up directly with the eyepiece.
The result is a slim, streamlined shape in which the lenses and prisms that magnify and correct the image are in a straight line and results in smaller size.
Porro Prism System
In porro prism binoculars the objective or front lens is offset from the eyepiece. Porro prism binoculars
provide greater depth perception and generally offer a wider field of view and results in a bigger size
