Celestron NexStar 102 SLT, 102mm (4") diameter Refractor Telescope with Motorized Altazimuth Mount & 4,000+ Object Database

Celestron NexStar 102 SLT: Picture 1 thumbnail Celestron NexStar 102 SLT: Picture 2 thumbnail Celestron NexStar 102 SLT: Picture 3 thumbnail Celestron NexStar 102 SLT: Picture 4 thumbnail

List Price: $761.95

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About Celestron NexStar 102 SLT

The popularity of Celestron's previous short tube refractor models inspired us to go a step further with the introduction of Celestron's NexStar 102 SLT. You'll find that astronomical viewing is a delight with this large, powerful 4" telescope. The 102 SLT offers a 63% increase in image brightness over 80mm models. This short-tube telescope with a fast f/6 optical system gives images that are bright and crisp. And the 102 SLT, like the other models in the SLT Series, comes with a fully computerized hand control with a database of over 4,000 celestial objects! With its pre-assembled, adjustable steel tripod, the NexStar 102 SLT can be up and ready to use in a matter of minutes. The SkyAlign alignment technology and the included StarPointer Finderscope with a red LED makes aligning a breeze.

Because of its wide 1.7 ° field of view, the NexStar 102 SLT is optimal for scanning large areas of the sky and for superb terrestrial (land) viewing. A wonderful entry to mid-level astronomical scope, with the use of an optional erect image diagonal, the 102 SLT can also be used as a land-based spotting telescope.

Summary of Customer Reviews

Customers most agreed on the following attributes:
Compact (3)

Celestron NexStar 102 SLT Features

  • Compatible with 2" eyepieces
  • High quality 102 mm short tube style refractor
  • Fully computerized Altazimuth mount
  • StarPointer finderscope to help with alignment and accurately locating objects
  • Quick-release fork arm mount, optical tube and accessory tray for quick no tool set up
  • Sturdy stainless steel tripod and accessory tray included
  • Good for terrestrial and celestial observing
  • TheSkyX First Light Edition astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images
  • Computerized Mount FeaturesProven NexStar computer control technology
  • Database allows telescope to locate over 4,000 celestial objects
  • SkyAlign allows you to align on any three bright celestial objects, making for a fast and easy alignment process
  • Flash upgradeable hand control software and motor control units for downloading product updates over the Internet
  • Internal battery compartment to prevent cord wrap during use
  • Auxiliary port for additional accessories such as GPS accessory
  • Includes NSOL telescope control software for basic control of your telescope via computer (with optional RS-232 cable)
  • Compatible with optional NexRemote telescope control software, for advanced control of your telescope via computer

Celestron NexStar 102 SLT Specifications

Optical Design
Aperture (mm)
102 mm (4.02 in)
Focal Length
660 mm (26 in)
Focal Ratio
Focal Length of Eyepiece 1 (mm)
25 mm (0.98 in)
Magnification of Eyepiece 1
26 x
Focal Length of Eyepiece 2 (mm)
9 mm (0.35 in)
Magnification of Eyepiece 2
73 x
Star Diagonal
Mount Type
Motorized Altazimuth
Accessory Tray
No Tool, Quick release
Highest Useful Magnification
241 x
Lowest Useful Magnification
15 x
Limiting Stellar Magnitude
Resolution (Rayleigh)
1.37 arc seconds
Resolution (Dawes)
1.14 arc seconds
Light Gathering Power
212 x
Apparent Field of View
1.7 Degree
Linear Field of View (@1000 yds)
91 ft (28 m)
Optical Coatings
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
4,000 Object Database
Optional SkySync GPS Accessory (93969)
2-year Telescope Warranty

Celestron NexStar 102 SLT Reviews

Reviewed by 3 customers


What a great buy


from Antietam MD  -  Casual/ Recreational

This is a fantastic deal for a refractor telescope. This is my 6th telescope. I have newts and schmits.My best schmit is a c8in and nwt is a 12in. This is my first refractor. I always wanted one but cost for aperture was was too expensive.The slt 102 seemed worth a try. I am so happy I did. I wanted a good grab and go and this is it. I already had a good 2in diagonal and put that in it right away. So i'm not gonna trash the 1.25 that comes with scope.I read bad comments about the star finder scope and have to say maybe these people got a different finder scope. I love mine. Works great! For twice the money you can't do better!

(2 of 2 customers found this review helpful)


Perfect telescope for anyone


from Tampa, Florida  -  Professional Guide

This is a fantastic telescope for a beginner or experienced astronomer. By upgrading the eyepieces and diagonal you'll get a high quality observing instrument. Beginners will have a small learning curve but once you understand the controls you'll be able to tour the universe. I have many telescopes from Celestron and they're are all large 11". This 102mm is highly portable and is a joy to use. I rate is 5 stars!

(1 of 5 customers found this review helpful)


Spend a bit more and get something else


from Perth, WA.  -  Casual/ Recreational

SLT handpiece light flickers on and off after a while, making a torch neccessary for using it. View is very limited with supllied eyepieces. Unstable. Hard to focus due to instability. Basically, the SLT doesn't work, we can never find 3 bright stars that it recognises. It is a kids toy product, buy something else!


Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Why Did You Choose This?
ROBERT L  it was a gift
Shopper  Can this Telescope be used for photography? How /Can you attach a bridge camera to it? For example a Panasonic FZ200? Is it easy to do so?
Andrew R  I believe that with the proper adapter ( http://www.adorama.com/CNTA1Q.html ) and matching t-mount (specific to the camera one is using) that theoretically you could use this telescope with a still image camera. Such use would likely be limited to interchangeable lens cameras. Unfortunately it may incredibly difficult to use a bridge/super zoom or point-n-shoot camera with this 'scope.
Shopper  is this telescope good for planetary and deep sky observations? even though it is a small aperture and a limiting magnitude of 12. what can I expect to see with this telescope? even though views would be small because of its fast focal ratio I assume a barlow lens would help out a lot?
DAVID G  Hey by the way, I realized that the celestron c8 might be way out of your budget. Have you looked at the NexStar 6SE GoTo Schmidt? It has 6" of aperture and the focal ratio is 10 (1500mm/150mm). So it's probably better than this small refractor you're considering by a lot. I think you will be happy with it especially if it's your first purchase.
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