Celestron NexStar 90 SLT Computerized Telescope

Item #CELE375-1

  • List Price:
  • $419.95
  • Your Price:
  • $399.99
  • You Save:
  • $19.96 USD5% + FREE Shipping
  • StarPointer Finderscope helps with alignment and locating objects
  • Good for terrestrial and celestial observing
  • SkyAlign allows you to align on any three bright celestial objects
  • Database allows telescope to locate over 4,000 celestial objects
Questions? Let our experts help!
  • Description

    Designed to be an affordable entry level to mid-level computerized GoTo telescope, the Celestron NexStar 90 SLT Telescope is loaded with valuable design features. With pre-assembled, adjustable stainless steel tripods, and quick release fork arms and tubes, NexStar 90 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!  

    General Features:

    • High quality 90mm Maksutov-Cassegrain
    • Fully computerized Altazimuth mount
    • StarPointer finderscope helps 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

    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!


    Celestron 2 Year Warranty

    Celestron warrants your product to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase satisfactory to Celestron.  


    About Celestron

    In the late 1950s, Tom Johnson, founder of Valor Electronics, built a telescope from scratch to introduce his sons to the wonders of stargazing. What began as a hobby soon grew to be Johnson’s driving passion, and in 1960, he formed an Astro-Optical Division within his company. That department eventually became Celestron.

    Prior to Celestron, skilled opticians painstakingly produced high-quality Schmidt-Cassegrain telescopes one by one, hand-figuring the glass for hours. Johnson wanted to bring observatory-grade optics to the masses, but achieving his dream required streamlining the manufacturing process. Johnson’s solution was developing ultra-precise match plates, allowing for mass production of the Schmidt corrector. With this groundbreaking new technique, Johnson created Schmidt-Cassegrain telescopes of unparalleled quality, and brought them to market at a surprisingly low price. Celestron telescopes were an instant smash success that catapulted the hobby of astronomy to new heights.

    In 1970, Johnson unveiled his landmark product: the Celestron 8, with its standout orange tube, high-end optics, and $1,000 price tag. Armed with the “C8,” thousands of amateur astronomers observed celestial objects previously seen only in professional observatories. The C8 cemented Celestron as an industry game-changer and the world’s premier telescope brand.

    For more than 50 years, Celestron has continued to lead the market, creating dozens of revolutionary new products including telescopes, sport optics, and microscopes. With more than 80 employees around the world, Celestron remains guided by our founding principles as we commit to ever-increasing global growth. Today, we still produce our flagship product—the 14-inch Edge HD optical tube—at our headquarters in Torrance, California, using Tom Johnson’s signature method.

      Supplier SKU


      What's Included

      Celestron NexStar 90 SLT Telescope, Tripod, Hand Controller, Computerized Altazimuth Mount, StarPointer Finderscope, "The Sky" CD Rom Software, 9mm Eyepiece, 25mm Eyepiece

    • Dimensions & Specifications

      Optical Design:




      Focal Length:


      Focal Ratio:


      Focal Length of Eyepiece 1:


      Magnification of Eyepiece 1:


      Focal Length of Eyepiece 2:


      Magnification of Eyepiece 2:




      Mount Type:

      Motorized Altazimuth



      Highest Useful Magnification:


      Lowest Useful Magnification:


      Limiting Stellar Magnitude:


      Resolution (Rayleigh):

      1.55 arc seconds

      Resolution (Dawes):

      1.29 arc seconds

      Light Gathering Power:


      Apparent Field of View:

      Linear Field of View:

      53 ft @ 1000 Yards

      Optical Coatings:

      Fully Coated

      Slew Speeds:

      Nine Slew Speeds

      Tracking Rates:

      Sidereal, Solar, and Lunar

      Tracking Modes:

      Alt-Az, EQ North, and EQ South

      Alignment Procedures:

      SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align

      Computerized Hand Control:

      Fully Computerized / Flash Upgradeable


      4000 Object Database


      Optional SkySync GPS Accessory

      Complete Weight:

      12 lbs


      Celestron 2 Year


      Download Celestron NexStar 90 SLT Telescope Instruction Manual
    • Product Guarantee

      We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

      Manufacturer Warranty

      Celestron has a limited lifetime binocular and spotting scope warranty and all other products have a 2 year manufacturer's warranty covers against defects is provided. If you have specific questions about this product's warranty please contact Celestron's Customer Service department at 310-328-9560.

      Return & Exchange Policy

      At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

    Ask The Experts

    Have questions about an item or need advice on selecting the right optic? Our team of experts is here to help! Avid outdoor enthusiasts themselves, they've tested gear in the field and can provide personalized product recommendations for just about any activity, from birding and hunting to sports and travel.

    You can reach our Customer Support line at 1-800-246-6285. We're open 8 a.m. to 8 p.m. Central Time, Monday through Friday and 9 a.m. to 4 p.m. on Saturday.

    After hours? Drop us an email at info@binocularsplus.com. We'll get back to you as soon as possible, usually within 1 business day.