The 254mm / 10" Dobsonian Telescopes are the model include a 2" focuser with a 1.25" adapter, allowing the use of either eyepiece size.

This Skywatcher 254mm 10 inch Dobobsonian telescopes are the model also include the new feature-tension control handle.

The telescopes are with the legendary Sports-Auto-Focus ensures instant sharp viewing in any situation even at varying or rapidly changing distances.

PYREX GLASS ON THE 10" Dobsonian:

The Dobsonian telescopes are features a primary mirror made of Pyrex glass. Because of its very low coefficient of thermal expansion, Pyrex glass is less affected by changing temperatures. This greatly reduces the cooling time of a telescope larger than 8” in dameter without using an extra fan. The great stability of this low expansion glass ensures high quality images. It is also substantially more resistant to scratching then plate glass. Available on 254mm/120mm (10" Dobsonian) only.


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 10" Dobsonian mounted telescope is popular among amateur astronomers and 254 / 10" telescopes are makers because of its simplicity. In its simplest form, the 254 / 10" 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 object of the Sky-Watcher 10" Dobsonian 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 254 / 10" tension adjuster can be tightened such that the Skywatcher 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.