Let’s Dive into Celestron NexStar 90SLT Computerized Telescope
The Celestron NexStar 90SLT Computerized Telescope promises an accessible entry point into the world of astronomy, combining a user-friendly design with a powerful computerized GoTo system. As someone who’s spent years navigating both tactical gear and the night sky, I was eager to see if this telescope could bridge the gap between ease of use and genuine stargazing potential. This Celestron model boasts a preassembled tripod, quick setup, and a database of over 4,000 celestial objects, making it sound like a dream for beginners and a convenient option for experienced observers.
Years ago, I struggled to find celestial objects using star charts and basic telescopes. I needed a telescope that could quickly and accurately guide me to interesting targets without requiring extensive astronomical knowledge. The Celestron NexStar 90SLT seemed to offer precisely that solution.
Upon unboxing, I was immediately impressed by the preassembled stainless steel tripod; it felt sturdy and ready for immediate use. The quick-release fork arms and optical tube made assembly surprisingly straightforward. Compared to other entry-level telescopes I’ve used, like some basic reflector models, the NexStar 90SLT‘s design felt more refined and less intimidating. I chose this over simpler, non-computerized options, hoping the GoTo system would save me countless hours of manual searching.
My first impression was one of cautious optimism. The promise of effortless navigation through the cosmos was exciting, but I was also wary of potentially complex technology overshadowing the fundamental joys of stargazing. Only real-world testing would reveal if this Celestron telescope could truly deliver on its promise.
Real-World Testing: Putting Celestron NexStar 90SLT Computerized Telescope to the Test
First Use Experience
I tested the Celestron NexStar 90SLT Computerized Telescope in a location with relatively dark skies about an hour outside of the city. The air was crisp and cool, typical of a late autumn evening. I set up the telescope in my backyard, which offered a wide view of the eastern horizon.
The initial setup was surprisingly smooth, thanks to the preassembled tripod and the quick-release mechanisms. After inputting the date, time, and my location into the hand control, I initiated the SkyAlign procedure. The telescope asked me to point it at three bright celestial objects. It didn’t require me to know their names, which was a major win for ease of use.
After the alignment, I directed the telescope to Jupiter. It smoothly and accurately slewed to the planet’s location, and I was rewarded with a clear view of Jupiter’s cloud bands and its four Galilean moons. The experience was significantly easier and faster than manually searching for Jupiter with my older telescope. There were no immediate issues other than the fact that I had to manually set the time; it would be nice if it had auto time keeping.
Extended Use & Reliability
After several weeks of use, the Celestron NexStar 90SLT has proven to be a reliable and enjoyable instrument. The tripod remains stable even on uneven ground. The computerized mount consistently delivers accurate GoTo performance.
I haven’t noticed any significant signs of wear and tear. I wipe down the optics with a microfiber cloth after each use and store the telescope in a dry environment. The NexStar 90SLT has outperformed my expectations, offering a blend of convenience and performance that makes stargazing accessible and rewarding.
Breaking Down the Features of Celestron NexStar 90SLT Computerized Telescope
Specifications
- Optical Design: Maksutov-Cassegrain, offering a compact tube with a long focal length. This design is known for its good contrast and sharpness.
- Aperture: 90 mm (3.54 in), the light-gathering ability determining the brightness and detail of observed objects. A larger aperture allows for observing fainter objects.
- Focal Length: 1250 mm (49.21 in), affecting the magnification and field of view. Longer focal lengths result in higher magnifications with narrower fields of view.
- Focal Ratio: 13.89, indicating the telescope’s light-gathering speed. Higher focal ratios are better for high-magnification viewing of planets and the Moon.
- Finderscope: StarPointer, projecting a red dot onto a window to aid in aligning the telescope. It is a simple but effective tool for initial targeting.
- Mount: Motorized Altazimuth, allowing the telescope to move up/down (altitude) and left/right (azimuth). It’s a straightforward and intuitive mounting style.
- Eyepieces: 25 mm (50x magnification) and 9 mm (139x magnification), providing different levels of magnification. These eyepieces are a good starting point for a range of observations.
- Tripod: Steel, providing a stable base for the telescope. The steel construction is durable and minimizes vibrations.
- Database: 4,000 Object Database, containing a vast catalog of celestial objects. This enables the GoTo functionality to locate and track a wide range of targets.
- Weight: 12 lb (5.44 kg), making it reasonably portable for transport and setup. This allows for easy movement to different viewing locations.
These specifications matter because they directly impact the telescope’s performance and usability. The Maksutov-Cassegrain design provides good image quality in a compact form, while the computerized mount makes it easy to find and track celestial objects.
Performance & Functionality
The Celestron NexStar 90SLT Computerized Telescope performs admirably for its intended purpose as an entry-to-mid-level instrument. Its GoTo system is accurate and efficient, guiding users to thousands of celestial objects with minimal effort. The optics provide sharp and clear views of the Moon, planets, and brighter deep-sky objects.
One of its strengths lies in its ease of use, making it accessible to beginners. The SkyAlign feature simplifies the alignment process, and the hand control is intuitive to navigate. However, the telescope’s relatively small aperture limits its ability to resolve faint deep-sky objects.
The Celestron NexStar 90SLT meets expectations for a computerized telescope in its price range. It delivers on its promise of making stargazing easier and more enjoyable.
Design & Ergonomics
The Celestron NexStar 90SLT features a compact and lightweight design. The steel tripod is sturdy, providing a stable platform for observations. The telescope is comfortable to use, with an easily accessible focuser and a user-friendly hand control.
The learning curve is minimal, even for those with no prior experience using a computerized telescope. The clear instructions and intuitive software make the setup and operation straightforward.
Durability & Maintenance
The Celestron NexStar 90SLT appears to be reasonably durable. The steel tripod and sturdy construction of the optical tube should ensure a long lifespan with proper care. Maintenance is simple, requiring only occasional cleaning of the optics with a microfiber cloth and storing the telescope in a dry place.
Accessories and Customization Options
The Celestron NexStar 90SLT Computerized Telescope comes with two eyepieces (25 mm and 9 mm) and a StarPointer finderscope. Optional accessories include additional eyepieces for different magnifications, filters to enhance planetary viewing, and a solar filter for safe observation of the sun. A CN-16 GPS accessory can be added for automatic time and location input.
The telescope is compatible with standard 1.25-inch eyepieces, allowing users to expand their collection with accessories from other brands.
Pros and Cons of Celestron NexStar 90SLT Computerized Telescope
Pros
- Easy to set up and use, especially with the SkyAlign technology.
- Computerized GoTo system with a database of over 4,000 celestial objects.
- Compact and lightweight design, making it portable and easy to store.
- Good views of the Moon, planets, and brighter deep-sky objects.
- Reasonably priced for a computerized telescope with these features.
Cons
- Smaller aperture limits the brightness and detail of faint deep-sky objects.
- Requires 8 AA batteries for operation (AC adapter is optional).
- Hand control does not automatically set the time; you have to manually enter the information.
Who Should Buy Celestron NexStar 90SLT Computerized Telescope?
The Celestron NexStar 90SLT Computerized Telescope is perfect for beginners who are interested in learning about astronomy and exploring the night sky. It’s also a good choice for casual observers who want a convenient and easy-to-use telescope for viewing the Moon, planets, and brighter deep-sky objects.
This product may not be suitable for experienced astronomers who require a larger aperture for observing faint deep-sky objects. It also might not be the best choice for those who prefer manual telescopes or those who do not want to rely on batteries.
A must-have accessory is an AC adapter to avoid constantly replacing batteries. Additional eyepieces can also enhance the viewing experience.
Conclusion on Celestron NexStar 90SLT Computerized Telescope
The Celestron NexStar 90SLT Computerized Telescope is a well-designed and user-friendly instrument that makes astronomy accessible to beginners and enjoyable for casual observers. Its GoTo system, compact design, and reasonable price make it a compelling option in the entry-level computerized telescope market. While its smaller aperture limits its deep-sky performance, it excels at providing clear views of the Moon, planets, and brighter celestial objects.
The price is justified by the convenience and ease of use that the computerized mount provides. I would personally recommend the Celestron NexStar 90SLT to anyone who is just starting out in astronomy or who wants a portable and easy-to-use telescope for casual stargazing. Step into the world of astronomy and experience the thrill of exploring the cosmos. Order your Celestron NexStar 90SLT Computerized Telescope today!