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Celestron NexStar 4SE 102mm Computerised Catadioptric Telescope

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About this product


  • Explore the universe and the world around you with this Maksutov-Cassegrain Catadioptric telescope
  • Capable of up to 241 times magnification (53 times with supplied eyepiece) to see to Jupiter and beyond
  • Comes with an 25mm eyepieces

Product overview

• Explore the universe and the world around you with this Maksutov-Cassegrain Catadioptric telescope
• Capable of up to 241 times magnification (53 times with supplied eyepiece) to see to Jupiter and beyond
• Comes with an 25mm eyepieces
• Get a clear, bright image with a 102mm aperture
• Lower the magnification down to 15 times (52 times with supplied eyepiece) for close objects such as birds and wildlife
• With 4,000 objects in its database, the computerised GoTo mount can tell you what to look out for in the night sky. It also helps you find and track exactly what you’re looking for. Requires eight AA batteries (not included)
• Comes with its own tripod for stability
• Use three bright celestial objects to align your telescope and use them to locate and track celestial objects at the touch of a button

Download the free Celestron Skyportal app on Android or IOS

What can I see with this telescope?
Discover amazing images in the night sky with this Catadioptric telescope with computerised mount. You can get impressive views of the moon and planet as well as passing comets and far off nebulae. The NexStar 4SE is a powerful compact telescope, giving you a focal range of over 1.3m from a 0.33m long telescope. The NexStar has an iconic orange tube design and comes with one eyepiece with 53 times magnification. The telescope has a 102mm aperture size, multi-coated primary mirror and 212 times the light gathering ability as the human eye. This gives you a detailed, clear and bright image.

Why choose a Catadioptric telescope?
Catradioptic telescopes use both lenses and mirrors to create a powerful optical telescope. The light enters through a lens then hits a series of mirrors that reflect the light to the eye piece. The tube is closed, reducing image degrading air current. Catadioptric telescopes are compact and give you the best of both worlds using mirrors like a reflector and a sealed tube as a refractor does.

What mount does this telescope use?
Powered by eight AA batteries (not included), the GoTo mount can automatically locate celestial objects from its database and track them across the night sky. With a backlight LCD display you can see what you’re doing even in the dark. The telescope has a unique single fork arm design and the tripod breaks down into separate components for quick and convenient transportation. The telescope must be cooled down between indoor and outdoor use – a scope this size will take 30-40 minutes to cool down. The finderscope runs off a single CR2032 (included).

Can this telescope track?
Locate three bright objects in the night sky and the computerised telescope can orientate itself, calculating its own location, time and date. Pick an object you want to see from the telescope’s 40,000 object database and your telescope will find and track it across the sky, compensating for the earth’s rotation. Not sure what you want to see? The database can give you recommended objects with the Sky Tour function so you don’t miss a thing. This is a great camera for exploring the universe or to start astrophotography with your DSLR camera.

Rated 5 out of 5 by from Great features Great buy, excellent telescope. Easy to set up and use
Date published: 2016-08-22
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Telescope model number Celestron NexStar 4SE (11049)
Telescope type Maksutov-Cassegrain Catadioptric
Technical specification
Aperture 102 mm
Focal length 1325 mm
Focal ratio 13
Focal length of eyepiece 1 25 mm
Magnification of eyepiece 1 53 x
Optical features
Highest useful magnification 241 x
Lowest useful magnification 15 x
Magnitude 12.5
Light gathering power 212 x
Apparent field of view 1 degree
Linear field of view 53 ft (16m) @ 1000 ft
Optical coating Multi- coated (primary mirror) Starbright XLT (corrector plate)
Slew speeds 9
Tracking rates Sidereal, Solar and Lunar
Tracking modes Alt-Az, EQ North & EQ South
Alignment procedures Sky Align, Auto Two-Star, Two-Star, One-Star, Solar System Align
Computer hand control 19 backlit LED buttons
Power 8 x AA batteries (DC 12 V @ 750 mA)
Physical Dimensions
Product weight 9.525 kg ( with tripod)
Total content weight 17.9 kg
Telescope diameter 102 mm
Telescope length 330 mm
Tripod height 1400 mm
Mount type Go To
Screen LCD 16 characters (back lit)
Supplied assembled No
Package Contents Celestron 4SE Telescope
GoTo mount
StarPointer finderscope
1 x eyepiece
RS232 Cable
Camera sutter cable
Comuter hand control

I am aware this takes batteries but can I source an ac adapter for the UK and a cable with a cigarette style plug to go into a 12 v power pack with the right connection for the telescope in store or online?

Asked by: Rjhardman
On this occasion Maplin do not stock a product that exactly meets your requirements, or indeed anything close enough to offer you as an alternative.
Answered by: Dominic
Date published: 2016-11-24

Can I use this during the day - will the image be the right way up?

Asked by: Stargazer
You can use it for terrestrial observation during the day. It could also be used for sky observation during the day, you could look at the moon for example if it is present, some planets can be observed during the day if you know where to find them in the sky and they are not close to the suns position in the sky. You should never look at the sun without specialist equipment. The image should appear right side up but back to front when viewing through the top of the scope using the flip mirror.
Answered by: Les
Date published: 2016-10-30

What extra equipment is needed to get to the 240x magnification mentioned.

Asked by: Adam
Typically you would utilise a combination of lense sizes accompanied by barlow lense to increase magnification. To determine power in a telescope, divide the focal length of the telescope by the focal length of the eyepiece. By exchanging an eyepiece of one focal length for another, you can increase or decrease the power of the telescope. You can also use a barlow to increase magnification by a factor 1.5x, 2x, 2.5x, 3x etc
Answered by: Les
Date published: 2017-01-27

Is it clear and bright to see saturn and Jupiter ? How big see it?

Asked by: Shumon
You would be able to see both Jupiter & Saturn with this scope as long as they are visible in the night sky. Jupiter appears as a bright circle with faint cloud bands and bright pinprick moons visible. Saturn again will appear as a small dot with slight bulges at either side. The size and brightness of objects in the eyepiece is going to be relative to the other equipment you use, small size eyepieces combined with barlow lenses can make an item bigger but will also affect overall brightness. For an example of how they would appear in the eyepiece it would be worth doing a websearch as actual object size is usually very different to expectation.
Answered by: Les
Date published: 2016-08-10

Can it track the moon or sun for eclipse events

Asked by: benblob
If correctly aligned and set up it will track any of the 4,000 objects in its database Viewing the sun requires a dedicated SOLAR FILTER, NEVER look at the sun without a filter.
Answered by: Les
Date published: 2016-04-28

Why does it have to be cooled down between taking indoors or out please

Asked by: Tony21
condensation is not the answer.  condensation may appear if you come  in from the cold to a warm environment indoors. The reason is this: you usually store your scope indoors where is it warm.  The telescope is sealed but the air inside inside it will have warmed to the same temperature as your house.  When you take it outside, the air is cold, but the telescope (and air inside it) is warm.  As the cool air cools the outside of the telescope, it will cause air currents inside the scope, which cause a shimmering effect, until the air inside has cooled to the same temperature as the outside air.  (A bit like looking at a distant object across an open space or hot tar a road, in summer) Letting the scope cool down to ambient outside temperature is called 'letting the scope acclimatise'.
Answered by: Mike
Date published: 2016-02-18

Can this be used without the tripod ie: tabletop 

Asked by: Paul
Technically I cannot see any reason as to why not, but you would not be utilizing the products full potential and would have effects on its performance/ease of use.
Answered by: Brad
Date published: 2016-01-17
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