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The Celestron NexStar 4SE 4-inch Maksutov-Cassegrain telescope combines compact optical precision with a fully computerized GoTo mount. Ideal for beginners and casual astronomers, this portable GoTo telescope delivers sharp, high-contrast views of the Moon, planets, and bright deep-sky objects.
4-Inch Maksutov-Cassegrain Optics
The NexStar 4SE features a 102mm Maksutov-Cassegrain optical design, known for excellent contrast and sharp planetary detail. Its long focal length makes it especially well-suited for:
Saturn’s rings
Jupiter’s cloud bands
Lunar craters and surface features
Bright deep-sky objects like the Orion Nebula
The Maksutov design provides superior optical performance in a compact, travel-friendly tube.
Fully Automated GoTo Mount (40,000+ Objects)
The computerized GoTo system automatically locates and tracks over 40,000 celestial objects using the NexStar+ hand controller. With SkyAlign technology, setup is quick and simple—even for beginners.
Optional accessories like StarSense AutoAlign and SkySync GPS allow the NexStar 4SE to grow with your experience.
Portable & Easy to Transport
Celestron’s patented single fork arm mount ensures stability while remaining lightweight and compact. The telescope breaks down into manageable components, perfect for backyard use or travel to dark-sky sites.
Key Features
4-inch (102mm) Maksutov-Cassegrain optics
Fully computerized GoTo mount
40,000+ object database
SkyAlign quick setup
Compact and travel-friendly design
Ideal beginner GoTo telescope
The Celestron NexStar 4SE GoTo Maksutov telescope is a powerful yet compact solution for anyone looking to explore the night sky with automatic tracking and sharp planetary performance.
Technical Specifications
OPTICAL TUBE INFO:
Optical Design:
Maksutov-Cassegrain
Aperture:
102mm (4.02")
Focal Length:
1325mm (52")
Focal Ratio:
f/13
Focal Length of Eyepiece 1:
25mm (0.98")
Magnification of Eyepiece 1:
53x
Finderscope:
StarPointer™ red dot finderscope
Star Diagonal:
Internal Flip mirror for straight thru or 90° viewing angle
Optical Tube:
Aluminum
Highest Useful Magnification:
241x
Lowest Useful Magnification:
15x
Limiting Stellar Magnitude:
12.5
Resolution (Rayleigh):
1.37 arc seconds
Resolution (Dawes):
1.14 arc seconds
Light Gathering Power (Compared to human eye):
212x
Secondary Mirror Obstruction:
35mm (0.38")
Secondary Mirror Obstruction by Diameter:
34%
Secondary Mirror Obstruction by Area:
12%
Optical Coatings:
StarBright XLT
Optical Tube Length:
343mm (13.5")
Optical Tube Diameter:
125mm (4.9")
Optical Tube Weight:
6 lbs (2.7 kg)
Dovetail:
CG-5 Dovetail bar
MOUNT INFO:
Mount Type:
Computerized Altitude-Azimuth Single Fork Arm
Instrument load capacity:
10 lbs (4.54 kg)
Height adjustment range (includes mount and tripod):
939.8mm - 2397mm (37" - 55")
Tripod leg diameter:
38.1mm (1.5") Stainless Steel
Mount Head Weight:
7 lbs (3.2 kg)
Accessory Tray:
Yes
Tripod Weight:
10 lbs (4.54 kg)
Slew Speeds:
9 slew speeds - max speed 3°/second
Tracking Rates:
Sidereal, Solar and Lunar
Tracking Modes:
Alt-Az, EQ North and EQ South
GPS:
N/A
Dovetail Compatibility:
CG-5 dovetail
Number of Auxiliary Ports:
1x AUX Port
Autoguide Port:
No
USB Port:
Yes, Hand Control input
Power Requirements:
8-AA batteries (not included) and 12 VDC-750 mA (Tip positive)
Motor Drive:
DC servo motors
Alignment Procedures:
SkyAlign, 1-Star Align, 2-Star Align, Auto 2-Star Align, Solar System Align, EQ North / EQ South Alignment (EQ align requires an equatorial wedge)
Periodic Error Correction:
No
Computerized Hand Control:
Double line, 18 character Liquid Crystal Display with 19 fiber optic backlit LED buttons
NexStar+ Database:
38,181 accessible objects. Enhanced information on over 200 objects.
Software:
Celestron Starry Night Special Edition Software and SkyPortal App
Total Kit Weight:
23 lbs (10.4 kg)
Included Items:
Optical tube Single Fork Arm Mount and Tripod Accessory Tray Star Pointer Finderscope Built-In Wedge NexStar+ Hand Control 25mm eyepiece
The Celestron NexStar 4SE 4-inch Maksutov-Cassegrain telescope combines compact optical precision with a fully computerized GoTo mount. Ideal for beginners and casual astronomers, this portable GoTo telescope delivers sharp, high-contrast views of the Moon, planets, and bright deep-sky objects.
4-Inch Maksutov-Cassegrain Optics
The NexStar 4SE features a 102mm Maksutov-Cassegrain optical design, known for excellent contrast and sharp planetary detail. Its long focal length makes it especially well-suited for:
Saturn’s rings
Jupiter’s cloud bands
Lunar craters and surface features
Bright deep-sky objects like the Orion Nebula
The Maksutov design provides superior optical performance in a compact, travel-friendly tube.
Fully Automated GoTo Mount (40,000+ Objects)
The computerized GoTo system automatically locates and tracks over 40,000 celestial objects using the NexStar+ hand controller. With SkyAlign technology, setup is quick and simple—even for beginners.
Optional accessories like StarSense AutoAlign and SkySync GPS allow the NexStar 4SE to grow with your experience.
Portable & Easy to Transport
Celestron’s patented single fork arm mount ensures stability while remaining lightweight and compact. The telescope breaks down into manageable components, perfect for backyard use or travel to dark-sky sites.
Key Features
4-inch (102mm) Maksutov-Cassegrain optics
Fully computerized GoTo mount
40,000+ object database
SkyAlign quick setup
Compact and travel-friendly design
Ideal beginner GoTo telescope
The Celestron NexStar 4SE GoTo Maksutov telescope is a powerful yet compact solution for anyone looking to explore the night sky with automatic tracking and sharp planetary performance.
Technical Specifications
OPTICAL TUBE INFO:
Optical Design:
Maksutov-Cassegrain
Aperture:
102mm (4.02")
Focal Length:
1325mm (52")
Focal Ratio:
f/13
Focal Length of Eyepiece 1:
25mm (0.98")
Magnification of Eyepiece 1:
53x
Finderscope:
StarPointer™ red dot finderscope
Star Diagonal:
Internal Flip mirror for straight thru or 90° viewing angle
Optical Tube:
Aluminum
Highest Useful Magnification:
241x
Lowest Useful Magnification:
15x
Limiting Stellar Magnitude:
12.5
Resolution (Rayleigh):
1.37 arc seconds
Resolution (Dawes):
1.14 arc seconds
Light Gathering Power (Compared to human eye):
212x
Secondary Mirror Obstruction:
35mm (0.38")
Secondary Mirror Obstruction by Diameter:
34%
Secondary Mirror Obstruction by Area:
12%
Optical Coatings:
StarBright XLT
Optical Tube Length:
343mm (13.5")
Optical Tube Diameter:
125mm (4.9")
Optical Tube Weight:
6 lbs (2.7 kg)
Dovetail:
CG-5 Dovetail bar
MOUNT INFO:
Mount Type:
Computerized Altitude-Azimuth Single Fork Arm
Instrument load capacity:
10 lbs (4.54 kg)
Height adjustment range (includes mount and tripod):
939.8mm - 2397mm (37" - 55")
Tripod leg diameter:
38.1mm (1.5") Stainless Steel
Mount Head Weight:
7 lbs (3.2 kg)
Accessory Tray:
Yes
Tripod Weight:
10 lbs (4.54 kg)
Slew Speeds:
9 slew speeds - max speed 3°/second
Tracking Rates:
Sidereal, Solar and Lunar
Tracking Modes:
Alt-Az, EQ North and EQ South
GPS:
N/A
Dovetail Compatibility:
CG-5 dovetail
Number of Auxiliary Ports:
1x AUX Port
Autoguide Port:
No
USB Port:
Yes, Hand Control input
Power Requirements:
8-AA batteries (not included) and 12 VDC-750 mA (Tip positive)
Motor Drive:
DC servo motors
Alignment Procedures:
SkyAlign, 1-Star Align, 2-Star Align, Auto 2-Star Align, Solar System Align, EQ North / EQ South Alignment (EQ align requires an equatorial wedge)
Periodic Error Correction:
No
Computerized Hand Control:
Double line, 18 character Liquid Crystal Display with 19 fiber optic backlit LED buttons
NexStar+ Database:
38,181 accessible objects. Enhanced information on over 200 objects.
Software:
Celestron Starry Night Special Edition Software and SkyPortal App
Total Kit Weight:
23 lbs (10.4 kg)
Included Items:
Optical tube Single Fork Arm Mount and Tripod Accessory Tray Star Pointer Finderscope Built-In Wedge NexStar+ Hand Control 25mm eyepiece
ZWO ASI585MC USB3.0 Color Astronomy Camera - OPEN BOX (ASI585MC)
David W Vandenberg
Excellent Service
Products as described, arrived 3 days before due date.
This is a great deep sky scope, and I am looking forward to getting some great pictures with it, all I need now are some clear skies (it's raining at the moment)
Astronomy Plus Pier Extension for ZWO, iOptron and Sky-Watcher Mounts
Claude Lamarre
ASTRONOMIK MC CLEAR FILTER 2’’ SCT 24 TPI
Se visse directement sur l’adaptateur 2’’ SCT 24 TPI
ASTRONOMIK MC CLEAR FILTER 2’’ SCT 24 TPI
Se visse directement sur l’adaptateur 2’’ SCT 24 TPI , votre dos visuel se visse sur le ASTRONOMIK MC CLEAR FILTER 2’’ SCT 24 TPI.
1) Permet de sceller le tube optique. Une touche de graisse de silicone pure, de qualité, celle pour les équipements de plongée assure l’étanchéité.
2) Empêche les contaminants de s’infiltrer
3) Empêche l’effet cheminée lorsqu’on change un oculaire ou un accessoire par temps froids.
4) Combiné à une isolation thermique de l'OTA un isolant thermique à double face genre REFLECTIX, permet de sortir l’instrument d’un local chauffé vers la température frigide extérieure pour observer immédiatement sans attendre l’équilibrage des températures.
J’ai testé de 25C à 5C, sur deux nuits à l’oculaire clavé 10mm dès l’installation 5 minutes après la sortie de l’instrument, l’image est absolument nette avec seulement la turbulence d’un seeing de 3-4, et ce durant toute la durée de la séance.
Images de Saturne au MK127 de SVBONY F:1500mm, Caméra ZWO ASI 678MC au foyer primaire, Filtre 1.25" Baader contrast boost, capture .SER, Sharpcap, PIPP, AS4!, registax 6.
Les photos sont un stack des images brutes stabilisé de PIPP, et l'autre un léger traitement dans Registax 6.
Le 27 octobre vers 21h30 5 à 10 minutes après avoir sorti l’instrument, viewing 3/5. Hier avec barlow QT 2,25x Baader, résultat similaire. C'est ce que j'espérait, les tests se poursuivre.
Astronomik MC-clear Filter
Darus
Helpful staff and competitive pricing make them a solid choice
Astronomy Plus is a reliable Canadian retailer specializing in telescopes and astrophotography gear.
Their product selection is excellent — everything from smart telescopes like the Seestar series to mounts, cameras, filters, and accessories from top brands. Items arrive in perfect condition and are well-stocked.
Shipping is impressively fast!
Astronomy Plus – Telescopes & Astrophotography Canada
Nice product, I hope it works for me. I put the tri-baht together properly, it snaps together easily. Problem, it does not fit my 11” Celestron cat. The hole in the center is too small by a millimetre so the tri-baht will not attach securely. Any suggestions?
Hi Mike, thanks for the detailed feedback, and sorry the mask isn’t securing properly on your 11” Celestron. Please contact us with your exact telescope model. What is your C11 version. Classic, Edge HD? This is probably why it does not work.
