'To make binoculars compact, most contain these triangular glass objects; the Porro type gives better depth perception'
prisms
THE LOOKING GLASS: To make binoculars compact, most contain these triangular glass objects; the Porro type gives better depth perception
To make binoculars compact, most contain these triangular glass objects; the Porro type gives better depth perception
To make binoculars compact, most contain these triangular glass objects; the Porro type gives better depth perception
THE LOOKING GLASS
prisms
THE LOOKING GLASS