Nexstar 4SE

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Product Overview


  • Celestron s iconic orange tube design is updated with all the latest features to provide the best stargazing experience for beginners and experienced observers alike.
  • 4-inch aperture provides excellent light-gathering ability at an affordable price. You ll get impressive views of the Moon and planets, along with deep sky objects like the Orion Nebula, while retaining a compact form factor.
  • Fully automated GoTo mount with database of 40,000+ celestial objects automatically locates and tracks objects for you.
  • SkyAlign technology gets your telescope aligned and ready to observe in minutes. Even if you re unfamiliar with the night sky, you can easily align your telescope on any three bright objects.
  • Unique single fork arm design and sturdy steel tripod all break down into separate components for easy transport and quick assembly.


Celestron s signature orange-tube telescope combines advanced features and excellent optics in one easy-to-use system, the NexStar 4SE. It s the perfect choice for your first serious telescope, offering striking views at an economical price.

Our Founder s Vision, Reimagined for the 21st Century
In the 1970s, Celestron s Schmidt-Cassegrain telescopes brought the hobby of astronomy to the masses and established Celestron as the world s premier telescope maker. Our founder, Tom Johnson, invented Celestron s proprietary method of producing Schmidt corrector plates for superior views and maximum portability. Johnson believed in creating high-quality optical instruments at an affordable price, and inspired a generation of amateur astronomers.

Four decades later, we ve improved upon this design by adding cutting-edge features, while staying true to our founder s intent.

View the Universe s Most Impressive Celestial Objects
The 4SE s four-inch primary mirror packs enough light-gathering ability to observe the best that the solar system has to offer: Saturn s rings, the cloud bands on Jupiter, and geographic features on the surface of the Moon. When it comes to deep sky objects, take your 4SE to a dark-sky site and you ll see hundreds of pinpoint stars in the Hercules Globular Cluster, the spiral arms of the Whirlpool Galaxy, and more.

Revolutionary Single Fork Arm Mount
We know the best telescope is the one you will use most often. That s why Celestron s engineers created NexStar SE s unique, patented single fork arm mount. It s perfectly portable and makes setup quick and easy. What s more, the NexStar SE breaks down into several lightweight and compact pieces, making it easy to transport, even in small vehicles. You ll have no problem getting the NexStar SE to your favorite observing site, or setting it up quickly in your backyard.

Of course, it s what s inside the mount that really counts. Sturdy construction from high-quality components give NexStar SE the pointing and tracking accuracy needed to observe and follow your favorite targets with push-button ease. Use the included NexStar+ hand control to locate over 40,000 celestial objects, or take a Sky Tour and let your telescope show you the best objects currently visible.

Aligning your telescope is simple and painless, too, thanks to SkyAlign. This process makes alignment as easy as 1-2-3: just center three bright objects in your eyepiece and press ALIGN. For even easier alignment, attach our StarSense AutoAlign and your NexStar SE aligns itself!

Advanced Features Let the NexStar SE Grow with You
The NexStar SE is compatible with all the high-tech accessories advanced users love. Provide GPS coordinates to your telescope with SkySync, or add automatic alignment functionality with StarSense AutoAlign.

If you want to explore the world of astroimaging, the 4SE is a perfect choice. Its built-in wedge allows you to track long exposures. You can even remove the telescope s secondary mirror and replace it with a DSLR or astronomical CCD camera for wide field images captured at f/2 using a Fastar/HyperStar lens assembly. Or, if you re interested in imaging the Moon and planets, pair your NexStar 4SE with a planetary camera. From your first observing session and for years to come, the NexStar SE is your trusted companion.


Optical Design


Aperture (mm)

102 mm (4.02 in)

Focal Length

1325 mm (52 in)

Formula:Focal Ratio


Focal Length of Eyepiece 1 (mm)

25 mm (0.98 in)

Formula:Magnification of Eyepiece 1

53 x



Star Diagonal

Internal Flip mirror for straight thru or 90 viewing angle

Mount Type

Single Fork Arm Altazimuth


Steel with built-in wedge

Power Requirements

8-AA batteries (not included)

Formula:Highest Useful Magnification

241 x

Formula:Lowest Useful Magnification

15 x

Formula:Limiting Stellar Magnitude


Formula:Resolution (Rayleigh)

1.37 arc seconds

Formula:Resolution (Dawes)

1.14 arc seconds

Formula:Light Gathering Power (Compared to human eye)

212 x

Apparent Field of View

1 °

Linear Field of View (@1000 yds)

53 ft (16 m)

Secondary Mirror Obstruction

1.38 in (35 mm)

Formula:Secondary Mirror Obstruction by Diameter


Formula:Secondary Mirror Obstruction by Area


Optical Coatings

StarBright XLT

Optical Tube Length

13.5 in (343 mm)

Total Telescope Kit Weight

11 lbs (4.99 kg)

Tripod Weight

10 lbs (4.54 kg) lbs (4.54 kg)

Slew Speeds

Nine slew speeds

Tracking Rates

Sidereal, Solar and Lunar

Tracking Modes

Alt-Az, EQ North & EQ South

Alignment Procedures

SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, SolarSystem Align

Communication Ports

RS-232 communication port on hand control, Aux port, Camera Control port

Computer Hand Control

Double line, 16 character Liquid Crystal Display with 19 fiber optic backlit LED buttons


38,181 accessible objects


2-year Telescope Warranty


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