TEL: 604-998-7071     Hello Guest, Login / My Account

Sky-Watcher DOB 6" TRADITIONAL Dobsonian Telescope
Sky-Watcher DOB 6" TRADITIONAL

Sky-Watcher DOB 6" TRADITIONAL Dobsonian Telescope

. Free Expedited Shipping for Most In-stock Products
(or estimated shipping costs in the shopping cart)
. Checkout Options for Ordering Online & Pickup
. Satisfaction Guarantee: 30 Days no Hassle Return (Condition Apply)
. Multiple Payment Options (Credit Card, Paypal, EMT, Financing)

Your Price:
On saleCAD379.00
Retail Price:CAD439.00

Your Savings:CAD60.00(14%)

Usually ships in 1-2 business days
Part Number:31010

Choose Options or Accessories if Applicable

Ships Worldwide - This item qualifies for international shipping. help
Sky-Watcher DOB 6" TRADITIONAL

The Sky-Watcher Dobsonian Telescope 153mm/1200mm (6") 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 models include a 2" focuser with a 1.25" adapter, allowing the use of either eyepiece size. This models 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 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 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.

  • Recommend for: FIRST TIME BUYER

     

    Specifications 

    Optical DesignNewtonian (Parabolic)
    Lens Material 
    Diameter153mm
    Focal Length1200mm
    Scondary Mirror Diameter34.5mm
    F/ratioF/7.8
    Highest Practical Power306x
    Faintest Steller Magnitude13.6
    Resoving Power0.74 arc sec
    Finderscope6X30 *
    Focuser diameter2" with 1.25" adapter
    Diagonal 
    Eyepiece(s)1.25 Super 25 and 10*
    Mount TypeDobsonian
    Slow-motion Control 
    Counterweight(s) 
    Piggyback Bracket 
    Accessory Tray 
    Ground Board Diameter?520mm
    Ground Board Weight(s) 
    Motor Drive 
    Go-to 
    Tube Weight5.78kg
    Tube Dimension(dia. x length) 
    Tripod Height 
    Shipping WeightTube:10kg, Base:14.8kg
    Shipping Carton Dimensions67x80x11(cm3) / 126x39x37(cm3)
     

     

    Download

    Dobsonian Manuals=> ALL DOBSONIAN MODELS WITH THE TENSION CONTROL HANDLE
    APPLIES TO: 6-INCH DOB, 8-INCH DOB, 10-INCH DOB


  • Related Items

    Recently Viewed Items