Skywatcher 10" Flextube 250 Collapsible Dobsonian TelescopeThe Ultimate Light Gatherer The Dobsonian telescopes are named after John Dobson, an amateur astronomer who designed a very simple but effective telescope, where the key factor is a large aperture for little money. His idea was to mount a Newton telescope on an easy to use alt azimuth mount that does not need time consuming alignments. Sky Watcher improved the Dobson design building a collapsible system that allows the telescope to be easily stored or