#refracting_telescope  optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece
  supertype:  optical_telescope__opticaltelescope  an astronomical telescope designed to collect and record light from cosmic sources
  subtype:  field_glass__fieldglas__glass__glas__spyglas  a small refracting telescope
  subtype:  Galilean_telescope  a type of refracting telescope that is no longer used in astronomy

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