Dobsonian telescopes offer an incredible aperture-to-price ratio. The Dobsonian mount, popularized by John Dobson in the 1970.s, is a simple and efficient method of mounting a Newtonian reflector, based on the Alt-Azimuth principal. Fast and easy to set up, the Dobsonian mount consists of a box-type mounting which allows the telescope to pivot in altitude, while the box itself is rotated on a base in azimuth. The secret of the design is to correctly balance the optical tube and use frictional materials which allow it to be moved easily when nudged but to stay in position when not. The mount is designed to be driven by hand as opposed to slow motion controls.Sky-Watcher Dobsonians provide excellent all round performance for the observation the Moon and Planets and Deep Sky Objects such as Galaxies and Nebulae.
The Sky-Watcher Flex Dobsonian series require very small storage place. The folded scope can be extended without any tools and no further adjustments of the optical elements is needed. Can be pointed to the selected object very quickly.
The 250mm modell shows quite many details from the sky. Visually stars down to 15th magnitude are visible, and fine details can be observed in galaxies and nebulae. The excellent quality reveals many fine details on the surfaces of Moon and planets, even the Encke-gap in Saturn's ring system is visible. Can be used to observe double stars as well. The tube is only 820mm long in storage position.