Meaning of Dobsonian telescope

Dob•so'ni•an tel"escope

Pronunciation: (dob-sō'nē-un), [key]
  1. a relatively inexpensive Newtonian telescope, suitable for visual but not photographic use, in which the tube assembly slips freely in the lower base.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.