Astronomy Specialist



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SkyWatcher Classic 250P DOBSONIAN Telescopes

The Ultimate Light Gatherer

The Dobsonian telescopes are named after John Dobson, an amateur astronomer who designed a very simple but effective telescope, where the key factor is a large aperture for little money. His idea was to mount a Newton telescope on an easy-to-use alt-azimuth mount that does not need time-consuming alignments.


The SkyWatcher 10" Dobsonian is a large aperture Newtonian reflector telescope with fast f/5 focal ratio, make it ideal for wide field and deep-sky observation. Big aperture means better light gathering power and with this SkyWatcher Telescope you are able to see prominent deep-sky object such as nebulae, star cluster and many more. To top it off, the SkyWatcher Classic Dobsonians are equipped with a 2" Crayford focuser and focuser locking screw – to allow easy use of either eyepiece size.

The Tension Control System allows you to adjust the friction setting; to increase or reduce the amount of resistance when moving the tube on the wooden mount, so you always have the appropriate resistance. The secret of the design is to correctly balance the optical tube with the specially designed handles (found on the base) and this adds enough friction and tension to allow the tube to move easily when nudged or to stay solidly in position.


Optical design
Newtonian with parabolic primary mirror
Aperture 254 mm (10")
Focal length
1200 mm
Focal ratio
Resolving power
0.47 arc-seconds
Stellar limiting magnitude
Highest practical magnification
508 x
Light gathering power 1317 x (compared to unaided eye)
Focuser 2" Crayford with 1.25" adapter


  • Finderscope 6X30 straight version
  • Eyepiece 1.25" Super 25mm (48x)
  • Eyepiece 1.25" Super 10mm (120x)
  • Eyepiece adaptor from 2" to 1.25" with M42 thread
  • 2" Tube Extension
  • User Manual
    Welcome Newcomer