plural of terrestrial telescope

plural of Galilean telescope

plural of Schmidt telescope

plural of refracting telescope

plural of reflecting telescope

A telescope which, unlike most telescopes used for astronomical purposes, contains an arrangement of lenses presenting an erect (non-inverted) image to the observer, suitable for observation of objects on the Earth's surface.

(astronomy) a type of refracting telescope (refractor) similar to the one used by Galileo Galilei

(astronomy) An alt-azimuth mounted Newtonian reflector (Newtonian telescope); a type of reflecting telescope (reflector).

plural of dialytic telescope

An achromatic telescope in which the coloured dispersion produced by a single object lens of crown glass is corrected by a smaller concave lens, or combination of lenses, of high dispersive power, placed at a distance in the narrower part of the converging cone of rays, usually near the middle of the tube.