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Skywatcher Dobsonian Telescope SWDOB200 8" - 203mm x 1200mm SW680 (SWDOB200)

 Retail Price: $499.00

Total Price: $499.00
Qty :    
Products Specifications

 

The Sky-Watcher Dobsonian Telescope 203mm/1200mm (8") have a "paraboloidal" 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 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.

 

WHAT is Dobsonian Telescope and WHY the 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 1970s. 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 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.

 

Standard accessories may vary.

 

Optical Design

Newtonian (Parabolic)

Diameter

203mm

Focal Length

1200mm

Scondary Mirror Diameter

47mm

F/ratio

F/5.9

Highest Practical Power

406x

Faintest Steller Magnitude

14.2

Resoving Power

0.56

Finderscope

9x50*

Focuser diameter

2” with 1.25” adapter

Eyepiece(s)

1.25” Super 25 and 10*

Mount Type

Dobsonian

Tube Weight

7.98Kgs

 

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NVT Pty Ltd is a soley Australian owned company providing high quality goods and service throughout Australia and New Zealand. We supply optical equipment including, binoculars, telescopes, rangefinders, night vision and riflescopes and related accessories.. NVT is directly associated with leading websites such as Telescopeshop.com.au, Nightvisionshop.com.au and DillonPrecision.com.au. Please note: prices and configuration can change without notice.
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