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!
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 upgrade-able 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
Disadvantages 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
Dimensions & Specifications
Good for Astrophotography
Highest Useful Magnification
Objective Lens Size Code
Viewing the Moon
Viewing Galaxies/Star Clusters
Viewing the Planets
Celestron NexStar SLT Telescopes
For the Beginner
For the Enthusiast
DocumentationDownload Celestron NexStar 90 SLT Telescope Instruction Manual
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.
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.