Sky-Watcher Star Discovery 90i

10273

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The Sky-Watcher STAR DISCOVERY 90i is a classic two-element, air-spaced, achromatic refractor. The telescope is easy to transport, and with its long focal length it is ideal for the detailed high-power study of the Moon, Planetary Surfaces and other objects in our solar system, providing crisp contrasty images

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Delivery In 1-5 Days*

£ 379.00 Tax included

1-5 Days UK Delivery*

Data sheet

Weight 6.25kg
Optical Design Refractor
Aperture 3.5 inch
Mount Type AZ
Focal Length 900 mm
Focal Ratio F10
Finderscope Red Dot Finder
Optical Coatings Multi Coated
What is more important to you? Image resolution over brightness
Would you like a telescope to navigate for you? Yes, I would like a scope to guide me.
Warranty One Year

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The Sky-Watcher STAR DISCOVERY 90i has been designed to be controlled wirelessly with your Smartphone or Tablet, using the free SynScan App for iOS or Android. The supplied Synscan™ Wi-Fi module creates it’s very own Wi-Fi network, so the mount can be used anywhere, without any reliance on other WiFi or mobile networks. After entering your coordinates into the App and following a simple alignment procedure, you are ready to explore the universe using the App’s intuitive touchscreen menu.

The STAR DISCOVERY 90i and SynScan™ App provides full computerised GO-TO control, allowing the telescope to be automatically slewed to any one of the objects in the App’s extensive database of 10,000+ celestial objects. 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.  

The Sky-Watcher STAR DISCOVERY 90i is a classic two-element, air-spaced, achromatic refractor. The telescope is easy to transport, and with its long focal length it is ideal for the detailed high-power study of the Moon, Planetary Surfaces and other objects in our solar system, providing crisp contrasty images. When combined with a Sky-Watcher 1.25" Erecting prism (code 20376, available separately) the telescope can be used during the day for high power terrestrial observations.       

MAIN FEATURES

  • 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
12.jpgAIR-SPACED TWO-ELEMENT ACHROMATIC REFRACTORS
An ordinary single lens brings different wavelengths of light to different focal points13.jpgAll Sky-Watcher Refractors are built with air-spaced two-element lenses, which reduce chromatic aberration more than standard doublet lenses.
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