The Sky-Watcher Mercury-707 Telescope is a Refractor Telescope. This telescope is recommended mainly for the observation of the planets, but can also be used for deep sky objects. It is supplied with a good level of equipment for both astronomical and terrestrial observations. Although similar externally to many other telescopes on the market, these telescopes are supplied with superior 1.25\" eyepieces and accessories. The eyepieces have been specifically selected to give a much more useful and practical range of magnifications to increase your viewing experience Specifications: Highest (Recommended) Useful Magnification: x140 Magnification (with optics supplied): x28, x56, x70, x140 Objective Lens Diameter: 70mm Telescope Focal Length: 700mm (f/10) Eyepieces Supplied (1.25\"): 10mm & 25mm x2 Barlow Lens 6x24 Finder 1.25\"/31.7mm Star Diagonal Multi-Coated Objective Lens 36% more Light Gathering than 60mm Tube material: Aluminium Alt-Azimuth Mount Aluminium Tripod with Accessory Tray