The telescope optics: The Sky-Watcher Skyliner-250PX Flextube Dobsonian telescope contains a 254mm parabolic Newton mirror optics. With the large aperture, it is very well suited to observing weaker deep sky objects in high resolution and contrast. But planets, the moon and all other objects in the night sky are also a lot of fun with this reflecting telescope. The telescope mount: The combination of the performance of the large optical tube with the particularly easy to transport, patented, collapsible FlexTube design allows you to use a powerful telescope anywhere. Dobsonian telescopes have an incredibly good price-performance ratio. The Dobsonian mount was introduced by John Dobson in the 1970’s and is a simple but efficient method of mounting a Newtonian telescope in azimuth. It is quick and easy to set up and allows movement in altitude and azimuth. The secret of the mount is the exact balance of the telescope and the use of special materials for friction, which allow easy, gentle movement and keep the Newtonian telescope securely stationary. This mount was designed to be moved by hand. Sky-Watcher Dobsonian telescopes offer excellent performance when observing the moon, planets and deep sky objects such as galaxies and nebulae. Scope of delivery: 254mm Flextube Newton telescope tube Dobsonian mount with accessory tray 2″ Crayford focuser, 1.25″ adapter and camera connection 9×50 viewfinder eyepieces: 10mm & 25mm! Power supply and batteries are not included in the scope of delivery!