Dobsonians give the best value for money of any type of telescope. You get a large aperture at an affordable price but still keep portability. The design is simple and solid. Setting up is as simple as putting the mount on the ground, slotting in the tube and adjusting the tension. You navigate the night sky by moving the scope left and right, up and down, by hand. This is simple and intuitive for beginners when compared with more complicated mounts.
The 12 inch (303mm) primary mirror collects more than twice as much light as an 8". Images are bright. Planetary nebulae will be full of details that cannot be seen in smaller scopes. Galaxies will reveal their spiral arms. Planets and the moon can be viewed in stunning detail. The limit on what you can see will not be the telescope, it will be the observing conditions.
The Sky-Watcher Flexitube 12″ Collapsible Dobsonian improved the Dobson design building a collapsible system that allows the telescope to be easily stored or transported. The 3 metal bars, used to fully extend the tube, have an auto-lock spring loaded system that simplify the set up of the telescope so only one person is required to fully extend the tube. The rigidity of the telescope keeps the mirrors collimated and the tension control system keeps the telescope balanced, so it is not necessary to move heavy counterweights. No disassembling or collimation is required between uses.
Just extend the tube, use the finderscope and point the telescope towards your favourite night sky objects.
The 12" Dobsonian telescope is a Newtonian reflector telescope with f/5 focal ratio, making it ideal for planetary and deep-sky observation.
The telescope is equipped with a 2″ focuser with a 1.25" adapter, 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.