Helios Dobsonian - Skyliner 200 (2" VERSION)
Helios Dobsonian Astronomical Telescopes and Accessories
Helios Astronomical Telescopes

Helios Dobsonian - Skyliner 200 (2" VERSION) 150mm (6") f/1200 Dobsonian Telescope

Skyliner 200 (2" VERSION) 150mm (6") f/1200 Dobsonian Telescope

These instruments offer an incredible aperture-to-price ratio.
The Dobsonian mount, popularized by John Dobson in the late 1970's, is a very simple but effective method of mounting a Newtonian Reflector, based on the alt-azimuth principle.
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 to use frictional materials which allow it to move easily when nudged but to stay in position when not. The mount is designed to be driven by hand as opposed to motor driven or via slow-motion controls, and as such make them more suitable for use at low-to-medium magnifications and for deep-sky observations.

An optical telescope gathers and focuses light mainly from the visible part of the Electromagnetic spectrum (although some work in the infrared and ultraviolet). Optical telescopes increase the apparent angular size of distant objects, as well as their apparent brightness. Telescopes work by employing one or more curved optical elements - usually made from glass - lenses or mirrors - to gather light or other electromagnetic radiation and bring that light or radiation to a focus, where the image can be observed, photographed, studied, or sent to a computer. Optical telescopes are used for astronomy and in many non-astronomical instruments, including: theodolites (including transits), spotting scopes, monoculars, binoculars, camera lenses, and spyglasses. There are three main types:

The refracting telescope which uses solely an arrangement of lenses (excluding star diagonals). 
The reflecting telescope which uses solely an arrangement of mirrors (excluding eyepieces). 
The catadioptric telescope which uses a combination of mirrors and lenses, and usually have a glass corrector plate at the front. 




Standard Specification:
Magnification Range x36, x50, x100, x200
Diameter of Primary Mirror 200mm
Telescope Focal Length 1000mm (f/5)
Eyepieces Supplied (1.25") 10mm & 20mm Super-MA
Eyepiece Supplied (2"/50.8mm) 28mm Kellner
Diffraction Limited Optics
Direct SLR Camera Connection
x2 Deluxe Barlow Lens (With Camera Adaptor)
9x50 Finderscope
Dual-Fit 1.25"/2" Focuser
Parabolic Primary Mirror
Wooden Alt-Azimuth Mount with Accessory Tray.

Product Code:522-2
 
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