Review of Celestron NexStar 90SLT Mak Computerized Telescope

Editor rating

4/5 on February 7, 2017

User's rating

399 reviews

PROS

  • Compact and portable
  • Excellent optics
  • Easy to use
  • Easy computerized for the proper tracking
  • The Sky X software included

CONS

  • AA batteries does not offer satisfied battery life
  • Lower aperture

VERDICT

Celestron NexStar 90SLT Mak Computerized Telescope is extremely portable and compact and provides versatility in both the celestial and terrestrial views. You might need some expertise for the setup, but once done it can offer you the best views.

The Celestron NexStar 90SLT Mak Computerized Telescope is designed to be used by aspiring, or amateur, astronomers. It belongs to the Computerized series of Telescopes manufactured by Celestron. Do you want to know more about this telescope? Are you considering buying it? If yes, then should read our review. It will help you with all the required information with both the positive and negative aspects.

Summary

The mains benefits, or pros, of this telescope are:

  • Compact and portable
  • Excellent optics
  • Easy to use
  • Easy computerized for the proper tracking
  • The Sky X software included

On the other hand, the main demerits, or cons, of this telescope are:

  • AA batteries does not offer satisfied battery life
  • Lower aperture

Celestron NexStar 90SLT Mak Computerized Telescope is extremely portable and compact and provides versatility in both the celestial and terrestrial views. You might need some expertise for the setup, but once done it can offer you the best views.

Full technical specifications

Optical Tube Info:
 Optical Design Maksutov-Cassegrain
 Aperture (mm) 90 mm (3.54 in)
 Focal Length 1250 mm (49 in)
 Focal Ratio 14
 Focal Length of Eyepiece 1 (mm) 25 mm (0.98 in)
 Magnification of Eyepiece 1 50 x
 Focal Length of Eyepiece 2 (mm) 9 mm (0.35 in)
 Magnification of Eyepiece 2 139 x
 Finderscope StarPointer
 Star Diagonal 1.25
 Mount Info:
 Mount Type Motorized Altazimuth
 Accessory Tray No Tool, Quick release
 Tripod Steel
 Highest Useful Magnification 213 x
 Lowest Useful Magnification 13 x
 Limiting Stellar Magnitude 12.3
 Resolution (Rayleigh) 1.55 arc seconds
 Resolution (Dawes) 1.29 arc seconds
 Light Gathering Power (Compared to human eye) 165 x
 Apparent Field of View 1 °
 Linear Field of View (@1000 yds) 53 ft (16 m)
 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
 Computer Hand Control Fully Computerized / Flash Upgradeable
 Database 4,000 Object Database
 GPS Optional SkySync GPS Accessory (93969)
 Warranty 2-year Telescope Warranty

Overview

Celestron 90SLT Mak Computerized Telescope is a quality telescope. It is affordable and offers some of the best features making it an easy option for the beginners and experienced astronomers alike. It is made of high-quality material and is durable.

It does not come preassembled. Therefore, you might need some expertise for the setup. Beginners can simply go through the manuals, and just follow instructions for the setup. Ultimately it is quite easy task.

The alignment is easy and can be done with Celestron’s SkyAlign technology. This technology helps the users to align this telescope with any three objects in the nighttime sky. It comes with a highly efficient remote control to manage the telescope’s operations. It comes also with a powerful database that enables the user to locate 4,000 objects at the sky in the night. You don’t have to worry about finding objects in the sky at all as this database does it for you!

Who can use it?

Anyone, both the beginner and experienced can use this telescope. However, beginners might find it a bit difficult to do the setup.

As it comes with the Skyalign feature, it helps to point the scope at three objects even without having a proper idea of them, that is especially helpful for beginners. The computer will figure out the objects, helping to get everything ready for stargazing!

It works for all types of viewing including the sky and the ground. It offers beautiful and clear pictures, so it’s good not only for gazing starts but also nature – making it ideal gift.

How does it work?

Celestron NexStar 90SLT Mak Computerized Telescope is compact and portable that makes it an ideal option quite much for everyone. It can be used both on the celestial and terrestrial objects. As it does not come preassembled, it will take a few minutes to get it ready. However, you can do the assembly without any tools, and it is quite easy task. Once you master it, you will certainly find it more exciting and comfortable to use.

The telescope comes with the quick release fork arms and tubes, adjustable stainless steel tripods, and patented SkyAlign technology. As it comes with the sky align technology, you will not need any chart for the alignment. You just need to simply enter time and the date and then you can point your telescope in the sky. The SkyAlign technology will identify the stars and then it will choose three of them. It can find 4000 objects. With the software, it can extend to 10,000.

Price vs benefits & features

Celestron NexStar 90SLT Mak Computerized Telescope comes with many advanced features at an affordable price. The price of this telescope is around $400, however you can get usually better deal from Amazon.

Some of the key features of this telescope are:

  • High-quality 90mm (3.5″) Maksutov-Cassegrain optics
  • The Sky X software
  • Suitability for both terrestrial and celestial use
  • StarPointer finderscope
  • Goo optical tube and useful accessory tray, and quick-release fork arm mount.

The Maksutov-Cassegrain optics helps to deliver the clear views of both planets and moons. The package includes everything including battery, Celestron NexStar 90 SLT Computerized Telescope, Stainless Steel Tripod, Accessory Tray, and CD-ROM “The Sky” Astronomy Software. Two eyepieces are also included, 9 mm for 139 X and 25 mm for the 50X intensification. In addition, it comes with the Sky X that can turn your PC into an online planetarium. It is also preferred for the compact and portable size and the tiny package.

Maksutov-Cassegrain scopes use both the mirrors and lenses. The users will get a decent amount of the power in the compact tube / size. It will look small, but the views will be exceptional, crisp, and clear. It can offer you the great views of nature and birds during the day and you can enjoy it with the stars at night.

As mentioned earlier, the SkyAlign technology helps the alignment. With a single push of the button, you can find over 4000 objects including planets, stars, and galaxies. It offers accurate tracking and that helps the user to get the high-power views of the stars and planets.

Sample video

Astrophotography using NexStar 90

Feedback

Celestron NexStar 90 SLT Mak Computerized Telescope has received mixed reviews from the customers. When many users have appreciated some developed features like the compact and portable size, affordable price, great optics, clear and sharp views, and versatility, others have a few complaints regarding the material, durability, awful instructions, and difficulty in the setup. Though some customers are not satisfied with the setup, but others have praised the product for the easy setup and operation. If you go through the overall reviews, you will find that many users have recommended this product.

Is there any guarantee?

Yes, the manufacturer offers a limited lifetime warranty. You will get two years manufacturer’s warranty against the defects. If you are not satisfied with the product, then you can send it back with the original packing within the thirty days of the delivery. That’s quite fair play?

Final words

Celestron NexStar 90 SLT Mak Computerized Telescope can be a good option for those who are looking an easy to use, easy setup, affordable, advanced, and compact telescope. It makes a perfect choice for entering the world of the astronomy. It will be ideal for the beginners for the affordability and the experienced astronomers can use it to enhance and refine their skill. Check it out now. You will end up with buying it, TelescopeStargazer.com recommends that product.

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If you have any questions or comments about Celestron NexStar 90SLT Mak Computerized Telescope, please leave a reply below! Hopefully you found this review helpful, and you will find the best scope for your purpose.

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