Telescope and binoculars

摘要

A telescope or binoculars includes an erecting system having a plurality of reflecting surfaces. First and second reflecting surfaces and third and fourth reflecting surfaces respectively face each other at right angles. An intersection line between extended surfaces of the first and second reflecting surfaces is perpendicular to the intersection line between extended surfaces of the third and fourth reflecting surfaces. An objective lens is located between the second and third reflecting surfaces and converges object light that is reflected by the first and second reflecting surfaces for forming an image. An eyepiece is located between the fourth reflecting surface and an eye point to magnify the image formed by the objective lens.