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Sky Watcher Star Discovery 90i Wifi Go-To Telescope


Quick Overview

The Sky Watcher Star Discovery 90i Wifi Go-To Telescope comprises of a 90mm f/10 focal ratio (900mm focal length) classic two-element, air-spaced, achromatic refractor on the excellent Skywatcher Star Discovery Wifi- controlled mount. Simply connect your smartphone or table (Android or iOS only) to the mount's wifi hotspot, connect the Skywatcher Synscan App and you;re off on a voyage of wire-free discovery around the night time sky.

The Synscan App’s extensive database of 10,000+ celestial objects, which is more than enough to keep observers occupied for years! The Star Discovery mount incorporates Sky-Watcher’s Freedom-Find™ patented Dual-Encoder Technology, which allows the telescope to be moved manually in either axis without the mount losing its positional information. This gives the user enormous freedom, convenience and flexibility during observational sessions.
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Sky Watcher Star Discovery 90i Wifi Go-To Telescope Specifications:

  • Magnifications (with eyepieces supplied): x36 & x90 

  • Highest Practical Power (Potential): x180

  • Objective Lens Diameter: 90mm

  • Telescope Focal Length: 900mm (f/10)

  • Eyepieces Supplied (1.25"): 10mm & 25mm

  • Red Dot Finder

  • 90° Star Diagonal

  • 1.25” Rack & Pinion Focuser

  • Star Discovery AZ Go-To  Alt-Azimuth Go-To Mount with Dual-Axis Tracking

  • Freedom-Find™ Dual Encoder Technology

  • Synscan™ Wi-Fi Adaptor Module

  • Controller: Free SynScan App for iOS and Android mobile device or Synscan Hand Controller (available separately)

  • SynScan App Database: Total 10,000+ Objects. Deep Sky Objects: 10759, including Messier, NGC, IC, Caldwell Catalogues, Named DSOs, Named Stars: 305, Double Stars: 55, Solar system objects: 7 planets, Sun , Moon. (Unlimited objects when working with a 3rd party planetarium software).

  • SynScan App Alignment Method: Brightest Star Alignment, North-Level Alignment

  • SynScan App's Other Features:  Tonight's Best Sky Tour, Point and Go with a mobile device, Identification of Celestial Objects, Remote control over Internet, User defined objects, Pointing Accuracy Enhancement (PAE)

  • 45mm Sky-Watcher/Vixen type dovetail saddle

  • Interface: SynScan Hand Control Port, DSLR Shutter Release Port (optional cables available separately)

  • Connectivity:  ASCOM platform for Windows PC, Mobile planetarium App for iOS and Android ( SkySafari Plus/Pro, more are coming).

  • Power Requirement: 12v DC 1Amp Power Supply (Tip Positive) or 8 x AA Batteries (not supplied)

  • Sky-Watcher 7Ah or 17Ah Power Tank Recommended

  • Stainless Steel Tripod with Accessory Tray

  • 33% more Light Gathering than 130mm


An ordinary single lens brings different wavelengths of light to different focal points

All Sky-Watcher Refractors are built with air-spaced two-element lenses, which reduce chromatic aberration more than standard doublet lenses.

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