Celestron’s advanced NexStar Star Location Telescope (SLT) has remained a popular choice among users for years, thanks to its blend of excellent optical performance, an intuitive computerized system, and a robust single-arm fork mount.
This telescope package includes a pre-assembled, height-adjustable stainless-steel tripod, a quick-release fork arm, the NexStar+ computerized hand controller, a 90mm Maksutov-Cassegrain optical tube, along with several useful accessories.
Designed for convenience, the complete telescope setup requires no tools, and the fast SkyAlign alignment process gets you observing within minutes. This makes the NexStar 90SLT an ideal option for spontaneous stargazing sessions as well as extended nights under the stars.
With the NexStar 90SLT, you can clearly observe details on the Moon’s surface, see the phases of Venus, spot Mars’ polar caps, view Jupiter along with its four Galilean moons, and enjoy Saturn’s rings. It also doubles as an effective terrestrial spotting scope for daytime and wildlife viewing.
The Maksutov-Cassegrain (MAK) is a catadioptric telescope, meaning it combines both lenses and mirrors in its optical system. Incoming light passes through a corrector lens, reflects off the primary mirror, then returns to a spherical secondary mirror before reaching the eyepiece. This design produces bright, crisp images with minimal chromatic aberration.
The Maksutov-Cassegrain design offers several advantages. Rather than using a separate secondary mirror, the MAK employs a reflective “secondary spot” applied directly to the inner surface of the corrector plate. As a result, the telescope does not need periodic collimation like a Schmidt-Cassegrain. Additionally, the smaller secondary spot enhances contrast, giving the MAK its well-known sharp and high-contrast views.
One consideration with Maksutov-Cassegrain telescopes is that the thicker and heavier corrector plate takes more time to reach thermal equilibrium compared to a Schmidt-Cassegrain of similar aperture.
Computerized Alt-Azimuth Mount – The NexStar SLT uses a single-arm alt-azimuth mount that smoothly tracks celestial objects as they move across the night sky. The mount is supported by a sturdy, pre-assembled adjustable steel tripod.
NexStar+ Hand Control – This computerized controller allows automatic slewing to any of 40,000 celestial objects at the press of a button. Its extensive database includes over 600 galaxies, 300 star clusters, and numerous double stars. Unsure what to observe? The Sky Tour feature automatically compiles a list of the best objects visible at your current time and location.
SkyAlign Technology – Celestron’s SkyAlign alignment system simplifies setup more than ever. Simply aim the telescope at any three bright objects in the sky, and the system calculates its position to locate additional objects automatically. No star knowledge is required–you can even use the Moon or bright planets. For more details about SkyAlign, visit here.
Power – Observe wherever you like. The NexStar SLT can be powered by eight AA batteries (not included), a PowerTank portable battery (sold separately), or a 12V AC adapter (sold separately). The internal battery compartment supplies power to the precision servo motors, ensuring smooth, low-vibration operation while eliminating cord wrap issues.
The telescope comes complete with a StarPointer™ red dot finderscope, a star diagonal, and two eyepieces (25mm and 9mm). These eyepieces provide both low- and high-magnification viewing options. The star diagonal offers a more comfortable viewing angle and an upright image, while the StarPointer™ finderscope helps you quickly align and center objects in the eyepiece.
The NexStar 90SLT is designed to grow alongside you as your astronomy skills advance. It is compatible with Celestron’s latest accessories, including StarSense AutoAlign, the SkyPortal WiFi module, and PowerTank Lithium.
Your purchase also includes a FREE download of Celestron’s Starry Night software. This powerful astronomy program helps you explore the night sky, learn about celestial objects, and plan future observing sessions. Celestron Starry Night is widely regarded as one of the leading astronomy software packages available, offering detailed tools to explore our solar system and far beyond.
TECHNICAL SPECIFICATION
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