Large 356mm aperture delivers dazzling views, 1650mm focal length, f/4.6 focal ratio Built-in Wi-Fi telescope control Innovative collapsible design for portability, storage, and back focus for astrophotography all while retaining collimation 2507x more light-gathering power than the human eye Patented Freedom Find™ technology uses dual encoders to allow manual control while retaining alignment Patented tension control handle allows for precise slewing and maximum stability Parabolic primary mirror with Radiant™ Aluminum Quartz (RAQ™) coating for 94% light reflectivity Heavy-duty rocker box with Teflon™ bearings provide a stable base with smooth motion 2-inch dual-speed Crayford-style focuser with 1.25-inch adapter allows for use of nearly any eyepiece 9x50 straight-through finderscope, 12.5 and 20mm 4-element 1.25-inch Plössl eyepieces, and SynScan hand controller with 42,000+ object database included Sky-Watcher’s Flextube SynScan GoTo Collapsible Dobsonian series are the telescopes your mother warned you about. Big aperture, bigger attitude, with all the innovations that make Sky-Watcher the obvious choice when hunting for that Goldilocks zone where value meets desire. Ranging from the standard 8 to a whopping 16 inches in diameter, Flextube SynScan Dobsonians are precision engineered instruments that will allow you to easily find and enjoy viewing night sky treasures such as planets and the Moon, nebulae, star clusters, galaxies and much more. With its patented collapsible tube design, these Dobsonians are truly the ultimate in portability and performance which is crucial when travelling to dark skies to make the most of these impressively large telescopes. The elegant truss tube design was carefully engineered to combine ease of use, extreme portability, and consistent performance in an affordable package. Unlike other truss tube designs, the Flextube Dobsonian does not need to be disassembled between uses. It transports as two compact pieces (optical tube and rocker box) that can be assembled and ready to use in just seconds! It is easy to collimate once set up, and it holds its collimation throughout the evening and even after being collapsed! The patented Tension Control Handle allows users to add or reduce tension, thereby increasing or decreasing the friction between the optical tube and the sideboards. The patented Freedom Find dual encoder design allows the telescope to be moved manually whenever the user wishes - but with no need for re-alignment! The SynScan hand controller allows you to point your telescope to a specific object, or even tour the best objects in the night sky at the touch of a button!! The user-friendly menu system allows automatic slewing to over 42,900 objects. Even an inexperienced astronomer can master its variety of features in a few observing sessions. The Flextube SynScan series seamlessly combines the convenience and affordability of the traditional Dobsonian with the performance and precision of a computerized GoTo telescope all to help you in your quest for big aperture views. SynScan hand control SPECIFICATIONS: Built-in Wi-Fi control Power supply: 10 to 15 V DC 1Amp, 2.1mm plug (center positive) Motor type: DC Servo Motors Resolution: motor encoder: 1,620,000 counts per revolution, main axis encoder: 11,748 counts per revolution Slew speeds: 1.0X, 2.0X, 8X, 16X, 32X, 200X, 400X, 600X, 800X, 1000X Tracking rates: Sidereal, Lunar, and Solar Tracking mode: Dual Axis Tracking Alignment method: Brightest-Star Alignment, Two-Star Alignment Database: 25 user defined objects. Complete Messier, NGC and IC catalog, partial SAO catalogues, with a total 42,900 objects GoTo pointing accuracy: Up to 5 arc min SKU S11830 UPC 050234118309 Optical Info Optical Design Newtonian Mirror Coatings Radiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity Glass Type Borosilicate Primary Aperture (mm) 356 F/Ratio 4.6 Focal Length (mm) 1650 Secondary Diameter 83mm Secondary Obstruction (by diameter) 23% Secondary Obstruction by Area 5% Observational Info Dawes Limit 0.33 Rayleigh Limit 0.39 Limiting Mag. 15.2 Minimum Magnification 50 Maximum Magnification 701 Light Gathering (compared to next size down) 36% General Info Focuser 2" Dual Speed Crayford OTA Length (Retract/Ext.) 38.5"/60" OTA Outer Diameter 16.5625" OTA Weight (with accessories) 53 Dob Base Weight 94 Dob Base Measurements 36"x31" Zenith Eyepiece Height 64" Accessories Included Finder 9x50 Finder Included Diagonal No Included Eyepieces 20mm/12.5mm Magnification w/ Included Eyepieces 82.5x/132x Included Case No Corrector No
