Celestron NexStar 90 SLT Computerized Telescope

Item #CELE375-1
Sale Price:$329.98 List Price: $419.95
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  • StarPointer Finderscope to help with alignment and locating objects
  • Database allows telescope to locate over 4,000 celestial objects
  • What's Included

    \The Sky\" Astronomy Software, Tripod, Accessory Tray"


    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!

    Intelligent Design

    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.




      • Proven NexStar computer control technology
      • High quality 90mm Maksutov-Cassegrain
      • Database allows telescope to locate over 4,000 celestial objects
      • Fully computerized Altazimuth mount
      • SkyAlign allows you to align on any three bright celestial objects, making for a fast and easy alignment process
      • Quick-release fork arm mount, optical tube and accessory tray for quick no tool set up
      • Flash upgradeable hand control software and motor control units for downloading product updates over the Internet
      • Sturdy stainless steel tripod and accessory tray included
      • Internal battery compartment to prevent cord wrap during use
      • Includes CD-ROM The Sky Astronomy Software which provides education about the sky and printable sky maps




    About Celestron Maksutov-Cassegrain Telescopes

    Celestron's Maksutov-Cassegrain telescopes are similar to Schmidt-Cassegrain models in regards to ease, durability, versatility, and minimal maintenance, but trade smaller fields of view for better resolution in planetary observation.

    The Maksutov-Cassegrain is similar to the Schmidt-Cassegrain with essentially the same advantages and disadvantages. It uses a thick meniscus correcting lens with a strong curvature and a secondary mirror that is usually an aluminized spot on the corrector. The Maksutov secondary mirror is typically smaller than the Schmidt's which gives it slightly better resolution for planetary observing.

    Advantages of Maksutov-Cassegrain Compared to Schmidt-Cassegrain


    • Smaller secondary obstruction results in a slight increase in planetary detail and contrast
    • Less expensive to manufacture
    • Longer focal lengths resulting in higher magnifications for planetary viewing

    Disdvantages of Maksutov-Cassegrain Compared to Schmidt-Cassegrain


    • Slightly heavier because of the thick meniscus correcting lens
    • Increased time to reach thermal stability in larger apertures over 90 mm
    • Longer focal lengths resulting in smaller field of view

    Supplier SKU


    Shipping Restrictions

    Available for shipment to the USA and Canada only.

    Dimensions & Specifications



    Battery Included




    Eyepiece 1

    25mm (50x)


    Alt-Az Mount



    Focal Length


    Focal Ratio


    Good for Astrophotography




    Highest Useful Magnification


    Lens Coating


    Mount Design

    Motorized Altazimuth

    Object Database

    4000 objects

    Objective Lens Size Code


    Optical Design


    Recommended Usage

    Viewing the Moon
    Viewing Galaxies/Star Clusters
    Viewing the Planets
    Viewing Nebulae

    Star Diagonal

    1.25 Inch

    Telescopes Series

    Celestron NexStar SLT Telescopes

    User Level

    For the Beginner
    For the Enthusiast


    2-Year Limited

    Weight Complete

    12 lbs

    International Shipping



    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 astronomy gear? Our team of telescope experts is here to help! Avid amateur astronomers themselves, they've tested products in the field and can provide personalized recommendations.

You can reach our Customer Support line at 1-800-303-5873. 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@telescopes.com. We'll get back to you as soon as possible, usually within 1 business day.