Sky-Watcher 6” Dobsonian Telescope

  • Inexpensive, but with plenty of light-gathering
  • Hundreds of celestial objects can be observed
  • The simple lazy-susan rocker-box mount of the Sky-Watcher Dobsonian is so easy to manipulate!
  • A perfect telescope for a youngster, a beginner or an amateur astronomer who wants to move up from an introductory level telescope.

More details

10050004 30030007
New product

$ 369

This product is no longer in stock

Add to compare

 
Product description

The Sky-Watcher Dobsonian Telescope 153mm/1200mm (6") have a "paraboloid" primary mirror to eliminate spherical aberration and a four-arm, secondary- mirror bracket with fine supports (0.5mm thick), to reduce diffraction spikes and light loss. In addition, this model includes a 2" focuser with a 1.25" adapter, allowing the use of either eyepiece size. This model also includes the new feature-tension control handle.

A simple, elegant form of an alt-azimuth mount made to carry a Newtonian reflector was popularized by John Dobson in the late 1970's. The Dobsonian mounted telescope is popular among amateur astronomers and telescope makers because of its simplicity. In its simplest form, the Dobsonian mount consists of a box which allows the optical tube assembly to pivot in altitude, while the box itself is swiveled on a base in azimuth.

The Dobsonian mount usually relies on the friction between the side bearings on the optical tube of the telescope and a frictional material on the saddle to hold the optical tube in place. If there is too much friction, the telescope is difficult to move to center an object in the field of view. If there is too little friction, the telescope will not stay where it is positioned. This makes stabilizing the optical tube of the telescope difficult when using a Dobsonian mount, especially when accessories, such as a finderscope or an eyepiece, are added to the optical tube. As long as the amount of friction is at an appropriate level, and therefore stabilization of the optical tube is achieved, the telescope can remain in its desired position to view an object and maintain its position even when the mount is rotated.

The devices for stabilizing a telescope on the Dobsonian mount currently available include: a sliceable weight to counter balance the weight of the telescope, a friction lock that must be adjusted to inhibit movement of the telescope, and a spring attached between the telescope tube and mount to aid in stabilization. These devices are inconvenient to use because they do not provide a simple and user-friendly way to adjust the friction.

The object of the Sky-Watcher Tension Control Handle invention is to provide a tension adjuster that users can easily turn to add or reduce tension, thereby increasing or decreasing the friction between the optical tube and the sideboard of the mount. By providing such a tension adjuster, the telescope does not need to be balanced in order to stay in position. The tension adjuster can be tightened such that the optical tube can stay in a position but can still be moved when prompted to adjust the position of the optical tube. Alternatively, the tension adjuster can be completely tightened to lock the optical tube in position.

 
Specification
Card Code4021021001 3020104018
--Telescope--
Area of application , Moon & Planets, Nebulae & Galaxies, Sun (only with suitable solar filter)
--Optics--
TypeReflector
Optical designNewtonian
Mirror designParabolic
Aperture (mm)153
Focal length (mm)1200
Focal Ratiof/8
Resolving Power (theoretical)0.91 arc sec
Magnitude limit (theoretical)12.9
Light gathering capacity (in relation to human eye)478x
Magnification22x-306x
Tube length (mm)126 cm
Tube weight (kg)5.78 Kg
--Focuser--
Type of buildRack & Pinion
Coarse FocuserYes
Connection barrel2" (with 1.25 adapter)
--Mount--
Type of buildAlt-Az
GoTo controlNo
TrackingNo
Counterweights (kg)No
--Tripod--
TypeDobsonian
MaterialWood
--Included accessories--
1.25'' eyepiecesSuper, 25 and 10
Finder scope6x30
Other accessoriesAccessory Tray, Direct SLR Camera Connection
--General--
Package dimensions126 cm x 39 cm x 36 cm (tube), 77 cm x 67 cm x 12 cm (mount)
Package weight25
 
Video (1)

 
Sky Guide 2016

7 other products in the same category:

Compare 0

No products

To be determined Shipping
$ 0 Total

Check out