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Celestron NexStar 90SLT Computerized Telescope
Celestron NexStar 90SLT Computerized Telescope

Celestron NexStar 90SLT Computerized Telescope

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Your Price: CAD $549.18
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Part Number:22087

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Celestron NexStar 90SLT Computerized Telescope

Quick Overview

General Features

  • High quality 90mm Maksutov-Cassegrain
  • Fully computerized Altazimuth mount
  • StarPointer finderscope to help with alignment and accurately locating objects
  • Quick-release fork arm mount, optical tube and accessory tray for quick no tool set up
  • Sturdy stainless steel tripod and accessory tray included
  • Good for terrestrial and celestial observing
  • “TheSkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images

Computerized Mount Features

  • Proven NexStar computer control technology
  • Database allows telescope to locate over 4,000 celestial objects
  • SkyAlign allows you to align on any three bright celestial objects, making for a fast and easy alignment process
  • Flash upgradeable hand control software and motor control units for downloading product updates over the Internet
  • Internal battery compartment to prevent cord wrap during use
  • Auxiliary port for additional accessories such as GPS accessory
  • Includes NSOL telescope control software for basic control of your telescope via computer (with optional RS-232 cable)
  • Compatible with optional NexRemote telescope control software, for advanced control of your telescope via computer

Designed to be an affordable entry level to mid-level computerized GoTo telescope, the NexStar SLT refractors, reflectors, and Maks are available in the most popular sizes and are loaded with valuable design features.  With preassembled, adjustable stainless steel tripods and quick release fork arms and tubes, NexStar SLT telescopes can be set up in a matter of minutes – with no tools required!  You can see details of the lunar surface, Venus and its phases, polar caps on Mars, Jupiter and its four moons, Saturn with its rings plainly visible and much more!  Most NexStar SLTs can also be used as a land-based spotting telescope.

Intelligent Design
Powered by 8 AA (user supplied) batteries or an optional AC adapter (#18778), these NexStar GoTos love to travel.  The internal battery compartment provides power to the high precision servo motors for rigid low-vibration performance while eliminating cord wrap issues associated with external battery packs.

With the NexStar’s ergonomically designed hand control, the user is free to remove the hand control from its holder for remote use or leave it cradled for hands-free operation.  With a touch of a button, you can select the object catalog, change the slew speed, view fascinating information about an object or simply know if a desired object is visible in the sky.

Celestron’s Revolutionary SkyAlign
Using Celestron’s patented SkyAlign (patent pending), simply input the date, time and location into the hand control then slew the telescope to any three bright celestial objects in the sky.  You do not need to know the names of the stars – you can even pick the Moon or bright planets!


Optical Design Maksutov-Cassegrain
Aperture (mm)90 mm (3.54 in)
Focal Length (mm)1250 mm (49 in)
Focal Ratio14
Eyepiece 1 (mm)25 mm (0.98 in)
Magnification 150 x
Eyepiece 2 (mm)9 mm (0.35 in)
Magnification 2139 x
Star Diagonal1.25
MountMotorized Altazimuth
Accessory TrayNo Tool, Quick release
Weight (lbs)12 lbs (5.44 kg)
Highest Useful Magnification213 x
Lowest Useful Magnification13 x
Limiting Stellar Magnitude12.3
Resolution (Rayleigh)1.55 arc seconds
Resolution (Dawes)1.29 arc seconds
Light Gathering Power (Compared to human eye)165 x
Angular Field of View (deg)1 °
Linear Field of View (@1000 yds)53 ft (16 m)
Optical CoatingsFully-Coated
Slew SpeedsNine slew speeds: 3°/sec, 2°/sec, 1°/sec, 64x, 32x, 16x, 8x, 4x, 2x
Tracking RatesSidereal, Solar and Lunar
Tracking ModesAlt-Az, EQ North and EQ South
Alignment ProceduresSkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align
Computer Hand ControlFully Computerized / Flash Upgradeable
Database4,000 Object Database
GPSOptional SkySync GPS Accessory (93969)
Based on Astronomy magazine’s telescope "report cards", scopes of this size and type generally perform as follows . . .
Terrestrial Observation: Yes
Lunar Observation: Great
Planetary Observation: Good
Binary and Star Cluster Observation: Good
Galaxy and Nebula Observation: Fair
Photography: Yes
Terrestrial Photography: Yes
Lunar Photography: Yes
Planetary Photography: Yes

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