BINOCULAR TELESCOPE

A binocular telescope (1) includes a pair of Schmidt-Pechan roof prisms (101), a second half pentaprism (102), a right-angle prism (103), a main circuit board (111), and an auxiliary circuit board. The second half pentaprism (102) is connected to a first lateral surface (10121) of one of the first half pentaprisms (1012). A second lateral surface (1021) of the second half pentaprism (102) substantially faces the other first half pentaprism (1012). The third lateral surface (1031) of the right-angle prism (103) is connected to the second lateral surface (1021) of the second half pentaprism (102). A normal of the fourth lateral surface (1032) of the right-angle prism (103) is perpendicular to an imaginary plane. The imaginary plane includes a normal of the first lateral surface (10121) and a normal of the second lateral surface (1021). The light emitter (1073) and the light receiver (1074) on the auxiliary circuit board are arranged above the fourth lateral surface (1032) of the right-angle prism (103) and electrically connected with the main circuit board (111) respectively.