Sky Watcher Heritage 150 Tabletop Dobsonian. By using mirrors instead of optical lenses Newton was able to increase the aperture of his telescope while reducing the overall size of the tube leading to brighter views of the night sky. The Heritage 130 pays homage to this design by honoring some of the great astronomers throughout history: Galileo Messier Kepler Newton among others. By using a lightweight 150mm parabolic primary mirror and a compact manual azimuth mount the Heritage 150 is the perfect blend of portability and aperture just as Newton intended. Collecting 363percent more light than the human eye and 44percent more light than the 130mm model the Heritage 150 uses the same optics as our Classic 150P Dobsonian but at a fraction of the size and cost. Each mirror is constructed of durable borosilicate glass with our signature Radiant Aluminum Quartz (RAQ )coating. The optical tube uses a unique system that allows it to be collapsed for easy portability and storage while retaining collimation. If you're looking for a grab-and-go travel telescope that delivers a bold full size viewing experience look no further than the Heritage 150. Its lightweight azimuth base uses Teflon bearings for smooth accurate slewing and has an altitude locking knob for steady viewing. The base also features skid resistant vibration suppressing rubber feet offering a stabilized view while allowing the telescope to be setup virtually anywhere with minimal vibration making this telescope the perfect camping companion. Specifications for Sky Watcher Heritage 150 Tabletop Dobsonian Telescope: Manufacturer: Sky Watcher Color: White Finish: Black Diamond Magnification: 48 - 120 x Objective Lens Diameter: 150 mm Objective Aperture: 25 mm 10 mm Focal Length: 750 mm Focal Ratio: f/5 Finderscope: Red Dot Finder Optical Coating: 94percent RAQ Condition: New Additional Features: 1.25in Helical Focuser Collapsible Tube Weight: 8 lb Tube Diameter: 7.25 in Length: 16 - 27 in 150 mm Features: Large 150mm aperture delivers crisp contrast-rich views of the Moon planets and so much more Fast f/5 focal ratio 750mm focal length Borosilicate parabolic primary mirror with Sky-Watcher's proprietary Radiant Aluminum Quartz (RAQ ) Collapsible tube design retains collimation while providing increased portability and easy storage 1.25-inch helical focuser Tabletop design with rubber feet to minimize vibration and increased stability Package Contents: Sky Watcher Heritage 150 Tabletop Dobsonian Telescope Sky Watcher S11710: Heritage 150 Tabletop Dobsonian