Category:Optigraph

Op"ti*graph, n. Etym: [optic + -graph: cf. F. opticographe. See Optic, a. ]

Defn: a telescope with a diagonal eyepiece, suspended vertically in Gimbals by the object end beneath a fixed diagonal plane mirror. It Is used for delineating landscapes, by means of a pencil at the eye End which leaves the delineation on paper.