Gerry Gibbs CW delivers Australia wide, including:  Adelaide, Albany, Albury, Alice Springs, Armidale, Balladonia, Ballarat, Bellvue Hill, Bendigo, Brisbane, Broadbeach, Broken Hill, Bunbury, Buddina, Bundaberg, Carnarvon, Croydon City Beach, Cobar, Broome, Bundaberg, Byron Bay, Cairns, Canberra, Carnarvon, Ceduna, Coffs Harbour, Cooktown, Chermside, Dalby, Darwin, Derby, Fremantle, Geelong, Geraldton, Georgetown, Gladstone, Glen Innes, Gold Coast, Hobart, Helensvale, Indooroorpilly, Kalgoorlie, Karratha,  Karumba, Katherine, Larrimah, Launceston, Leederville, Lismore, Loganholme, Mackay, Melbourne, Moree, Mount Isa, Moura, Newcastle, Noosa, Mackay, Maroochydoore, Noosaville, North Lakes, Robina, North Rockhampton, Strathpine, Perth, Parramatta, Port Hedland, Portland, Port Lincoln, Port Macquarie, Ravensthorpe, Rockhampton, Sunshine Coast, Sydney,Toowoomba, Torquay, Townsville, Westcourt, Wollongong. Plus All areas that are served by Australia Post and its'  partners.

Delivery to Sydney, Brisbane, Broadbeach, Adelaide, Leederville, Melbourne, Perth, Parramatta, Hobart, Darwin, Canberra, Croydon, Cairns, Indooroorpilly, Noosa, Mackay, Maroochydoore, Wollongong can be done by Austrlia Air Express for Gerry Gibbs Camera Warehouse


 


Skywatcher SW580 150mm 6 inch Dobsonian Telescope Paraboloidal

$288.98

Web Special 

The Skywatcher SW580 150mm  6 inch Dobsonian Telescope 153mm/1200mm (6") have a "paraboloidal" primary mirror to eliminat50e spherical aberration and a four-arm, secondary- mirror bracket with fine supports (0.5mm thick), to reduce diffraction spikes and light loss. The Skywatcher 6 inch Dobsonian include a 2" focuser with a 1.25"adapter, allowing the use of either eyepiece size.


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 skywatcher sw580 150mm, 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 filed of view. If there is too little friction, the telescope will not sty 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 (US Patent No. 6,940,642) 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.

Its "paraboloidal" primary mirror eliminates spherical aberration and a four-arm, secondary- mirror bracket with fine supports (0.5mm thick) works to reduce diffraction spikes and light loss. In addition, this model include a 2" focuser with a 1.25" adapter, allowing the use of either eyepiece size. This model also include the new feature-tension control handle.

The Skywatcher 6" Dobsonian Telescope includes the new feature-tension control handle. The secret of the design is to correctly balance the optical tube with special designed handles on the base.

The design adds enough friction and tension to allow the tube to move easily when nudged but to stay in position when not. Users can easily add or reduce tension by turning on the handle. This feature solves the common balance problem found on many Dobsonians.

The Skywatcher SW580 150mm Features:

- Paraboloidal primary mirror to eliminate spherical aberration
- Four-arm, secondary- mirror bracket with fine supports (0.5mm thick) to reduce diffraction spikes and light loss.
- 2" focuser with a 1.25" adapter, allowing the use of either eyepiece size.
- New feature-tension control handle.

The Skywatcher 6 inch Dobsonian Specifications:

Colour     No
Manufacturer     Skywatcher
Recommended Usage     Astrophotography, Viewing Galaxies/Stars, Viewing Nebulae, Viewing the Moon, Viewing the Planets
User Level     For the Beginner
Specifications    
Optical Design     Newtonian (Parabolic)
Diameter     150mm
Focal Length     1200mm
F/ratio     F 8
Highest Practical Power     360x
Faintest Steller Magnitude     13
Resoving Power     0.8
Finderscope     9x50 Finder
Focuser diameter     50.8mm & 31.7mm
Color     White
Eyepiece(s)     1.25” S20 and S10
Mount Type     Dobsonian





















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  • Manufactured by: Skywatcher



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This product was added to our catalog on Friday 23 October, 2009.

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