SkyWatcher 10" Classic Dobsonian Telescope

The Ultimate Light Gatherer The Dobsonian telescopes are named after John Dobson, an amateur astronomer who designed a very simple but effective telescope, where the key factor is a large aperture for little money. His idea was to mount a Newton telescope on an easy-to-use alt-azimuth mount that does not need time-consuming alignments. The Sky-Watcher 10″ Dobsonian is a large aperture Newtonian reflector telescope with f/5 focal ratio, make it ideal for wide field and deep-sky observation. Big aperture means better light gathering power and with this Sky-Watcher Telescope you are able to see prominent deep-sky object such as nebulae, star cluster and many more. To top it off, the Sky-Watcher Classic Dobsonians are equipped with a 2″ rack and pinion focuser and focuser locking screw – to allow easy use of either eyepiece size. Optics with 94% Reflectivity All Dobsonians utilize a borosilicate mirror with a quartz overcoat, producing an incredible 94% reflectivity rating! Complete with Accessories Comes complete with a finderscope, two 1.25-inch eyepieces (10mm and 25mm), and a 2-inch to 1.25-inch adapter. Patented Tension Control Handle Using Sky-Watcher’s patented tension control handle provides the Classic Dobsonian with solid control for precise aiming and slewing. Separates Into Two Sections Sky-Watcher’s Classic Dobsonian is easy to transport and quick to setup. Simply set the optical tube into the base and thread on the tension knob. Tension Control SystemThe 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. } } In The Box: Finderscope 6×30 straight version Eyepiece 1.25″ Super 25mm (48x) Eyepiece 1.25″ Super 10mm (120x) Eyepiece adaptor from 2″ to 1.25″ with M42 thread 2″ Tube Extension User Manual Sky-Watcher Classic 10-inch Dobsonian Telescope Specifications SKU SWDOB250 UPC 050234116206 Optical Design Newtonian Reflector Mirror Coatings Radiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity Glass Type Borosilicate Primary Aperture (mm) 254 mm (10 inches) Focal Ratio (f/) 4.7 Focal Length (mm) 1200 mm Secondary Mirror Diameter 64 mm Secondary Obstruction by Diameter 25% Secondary Obstruction by Area 6% Dawes Limit 0.46 arcseconds Rayleigh Limit 0.55 arcseconds Limiting Magnitude 14.5 Minimum Magnification 36x Maximum Magnification 500x Light Gathering (compared to next size down) 57% more Focuser 2” Crayford-style with 1.25” adapter Optical Tube Assembly (OTA) Length 45 inches OTA Outer Diameter 11.375 inches (289 mm) OTA Weight (with accessories) 28 lbs (12.7 kg) Dobsonian Base Weight 25 lbs (11.3 kg) Dobsonian Base Measurements 29 × 20.5 inches Zenith Eyepiece Height 48 inches Included Finder 9×50 Finderscope Included Diagonal None Included Eyepieces 25 mm and 10 mm Super (modified Kellner) Magnification with Included Eyepieces 48× (25 mm) and 120× (10 mm) Included Case None Corrector None Mount Type Dobsonian Alt-Azimuth Primary Mirror Type Parabolic Secondary Mirror Supports 4-vane with 0.5 mm thickness Highest Practical Power 508x Light Gathering Power (compared to the unaided eye) 816x Mirror Material Pyrex Glass Included Accessories Eyepiece adapter from 2” to 1.25” with M42 thread, 2” Tube Extension, User Manual Warranty 5 Years Sky-Watcher Limited Warranty