nOptigraphA 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.
Century Dictionary and Cyclopedia
noptigraphA form of telescope constructed for the purpose of copying landscapes, etc. It is suspended vertically in gimbals by the object-end, beneath a fixed diagonal plane mirror, which reflects the rays from the objects to be drawn through the object-glass of the instrument to a speculum, and thence through the eye-glass to the eye. Between the eye and the speculum is a piece of parallel-faced glass with a small dot on its center, exactly in the focus of the eyeglass. This dot is made to pass over the outlines of an object, and a pencil fixed at the eye-end traces the delineation on paper.
Webster's Revised Unabridged Dictionary
Optic, + -graph,: cf. F. opticographe,. See Optic (a.)