Astronomy Specialist



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The SkyWatcher Flextube 10" Go-To Collapsible Dobsonian combines the great light gathering of the Dobsonian telescope with the convenience of the SynScan computerised pointing system.


Once the telescope is aligned, the Go-To system allows the user to slew the telescope towards planets, stars, nebulae, galaxies, clusters and much more. The SynScan controller has 42,900 celestial objects in its memory, allowing for an amazing journey of the night sky. The Deep Sky Tour function suggests a list of the most interesting deep sky objects so even the beginner astronomer can easily observe faint objects with a touch of a button.


The patented collapsible system is the ultimate in technology and portability and is ready for night sky action in seconds; the spring loaded system enables an easy, single handed extension of the tube.

The Freedom Find technology (dual-encoder) allows the telescope to be moved manually whenever the user wishes, but without losing any of the pre-set alignment.

To top it off, the Sky-Watcher Collapsible Dobsonians are equipped with a 2″ Crayford focuser with locking screw.



Optical design

Newtonian with parabolic primary mirror


254 mm

Focal length

1200 mm

Focal ratio


Secondary mirror

58 mm (minor axis)



Resolving power

0.47 arc-seconds

Stellar limiting magnitude


Max magnification

508 x

Light gathering power

1317 times the human eye


Crayford 2"

Max tube length

1120 mm

Min tube length

805 mm

Tube outer diameter

340 mm

Tube weight

10.35 kg (inc. accessories)

Base size

760 mm x 520 mm

Base weight

17.7 kg

Max eyepiece height

1245 mm





  • SkyWatcher Flextube 250 collapsible Go-To
  • SynScan hand controller with cable (RJ45 to RJ12)
  • 12V power supply cable
  • 2" tube extension for 2" eyepieces
  • Finderscope 9 x 50
  • Eyepiece adapter from 2″ to 1.25″ with M42 thread
  • Eyepiece 1.25″ Super Plossl 25mm (48x) – apparent field of view 52°
  • Eyepiece 1.25″ Super Plossl 10mm (120x) – apparent field of view 52°
  • User and SynScan Manual

The SynScan go-to system is a computerized system supplied with the professional SkyWatcher mounts and telescopes. 

It features:

  • 9 speeds 1x, 2x, 16x, 32x, 64x, 128x, 400x, 500x, 600x, 800x (3.3°/sec)
  • 42,900 objects including planets, the moon, the sun, named stars, double stars, variable stars and the most famous catalogue that are Messier, Caldwell, NGC, IC & SAO 
  • Sidereal, moon and sun tracking speeds, 
  • Pointing Accuracy Enhancement feature (PAE)
  • Unknown Object Identification feature
  • Permanent Periodic Error Correction (PPEC) for mounts only
  • One, two and three stars or brightest star alignment (alt-azimuth telescope need at least 2 stars for the alignment)
  • Telescope parking feature
  • Polar allign procedure 
  • Deep Sky Tour function that suggests a list of the most interesting deep sky objects currently visible.

SkyWatcher SynScan 5

Download the SynScan user manual

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