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Description
Celestron NexStar 4 SE 102mm f/13 Maksutov-Cassegrain Go-To Telescope102mm Maksutov Cassegrain Telescope 1325mm Focal Length, f 13 Focal Ratio StarBright XLT Optical Coating System Single Fork Motorized GoTo Alt Az Mount 1. 25" 25mm Eyepiece SkyAlign Alignment Technology NexStar+ Computer Hand Controller 40,000 Object Database with Sky Tours Red Dot StarPointer Finder Stainless Steel Tripod with Wedge Celestron 's NexStar 4 SE 102mm f 13 Maksutov Cassegrain Go To Telescope is a powerful, versatile and user friendly
- 102mm Maksutov-Cassegrain Telescope
- 1325mm Focal Length, f/13 Focal Ratio
- StarBright XLT Optical Coating System
- Single Fork Motorized GoTo Alt-Az Mount
- 1.25" 25mm Eyepiece
- SkyAlign Alignment Technology
- NexStar+ Computer Hand Controller
- 40,000 Object Database with Sky Tours
- Red Dot StarPointer Finder
- Stainless Steel Tripod with Wedge
Celestron 's NexStar 4 SE 102mm f/13 Maksutov-Cassegrain Go-To Telescope is a powerful, versatile and user-friendly Maksutov-Cassegrain style telescope that can be used for observing everything from the Moon and planets to deep sky objects like galaxies and nebulae. Using Celestron's proprietary StarBright XLT multi-coating system, light transmission is increased throughout the entire optical path with anti-reflection multi-coated lenses, highly reflective multi-coated mirrors, and BK7 optical glass.
The scope's Maksutov variation of the Cassegrain optical system exchanges the front corrector plate of the more common Schmidt design with a convex meniscus lens which not only eliminates the need for periodic collimation, but the nature of the lens requires a smaller secondary mirror which limits obstruction and increases contrast. This optical system, coupled with its precision tracking, allows it to be a competent astrophotography/astroimaging platform for the Moon and planets - despite its relatively slow f/13 focal ratio
Driving the dual servo motors on the mount is the brains of the NexStar 4SE: the iconic NexStar computer hand controller. Packed with almost 40,000 celestial objects, it can hold up to 25 additional user-defined destinations and is updateable via the Celestron website. It has multiple alignment procedures to get you observing fast - including the super-easy SkyAlign system. Capable of being used in the northern or southern hemispheres, the NexStar has sidereal, lunar and solar tracking speeds to accurately follow near and deep-sky objects, plus nine slew speeds.
- Performance
-
- 4" aperture
- f/13 focal ratio
- 1325mm focal length
- BK7 optical glass primary mirror
- StarBright XLT optical coatings: Multi-layer aluminum/SiO2 (quartz)/TiO2 (titanium dioxide)/Si02 (silicon dioxide) mirror coatings with flat reflectivity across the light spectrum for both astrophotography/astroimaging and visual observation
- Multi-layer MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide) anti-reflective lens coatings
- High-transmission water white glass corrector lens with 97.4% light transmission
- Resolution: Rayleigh: 1.36 arcsec / Dawes: 1.14 arcsec
- Secondary mirror obstruction: 1.25", 34.4% by diameter / 11% by area
- NexStar Computer Controller
-
- Two-line, 16-character LCD display
- 19 fiber optic backlit red LED buttons
- Database of over 38,000 celestial objects plus 25 user-defined
- Automatically slew to planets, objects, constellations plus a variety of catalogs, including the Messier, NGC, Caldwell, and SAO brightest stars
- Anti-backlash compensation programs-out play between gears for more precise tracking
- Tour Mode: Shows a selection of the most popular objects for the time and date you are observing
- Pre-programmed alignment systems including SkyAlign, Auto 2-Star, 1-Star, 2-Star, and Solar System for fast and easy set up
- SkyAlign alignment: Takes minutes, with minimal effort or experience - Point the telescope at three bright objects in the sky, and the telescope does the rest
- Pre-set sidereal, solar, and lunar slew speeds for observing the fast-moving Moon, to slower-moving deep space subjects
- Nine slew speeds: 4°/sec, 2°/sec, 1°/sec, 0.5°/sec, 2x, 4x, 8x,16x, and 32x
- RS-232 communication port allows for computer control
- Flash updateable via the Celestron website
- Mount
-
- Single fork alt-az
- Dual-axis servo motors with optical encoders allow for precise tracking with virtually no vibration
- Motor resolution: 0.26 arcsec
- Communication ports: Autoguider port, Aux port, hand-controller
- Runs on eight user-supplied AA batteries or optional 12VDC power supply
- Viewing Options
-
- Integrated internal 90° flip mirror
- With mirror flipped up the 90° angle puts head in a comfortable viewing position when scope is pointed at or near the zenith
- Lay mirror down to direct light to the visual back for astrophotography/imaging
- Eyepiece
-
- 1.25" diameter barrel
- 25mm focal length produces 53x magnification
- Anti-reflection multi-coated glass improves color rendition and contrast
- Threaded barrel accepts most 1.25" astronomical filters
- Fold down rubber eyecups for use with or without eyeglasses
- Starpointer
-
- Projects a single red dot in line of sight
- Un-magnified to make finding objects faster and easier
- Used primarily for alignment process
UPC: 050234110495
| Optical Design | Maksutov-Cassegrain reflector |
| Aperture | 102 mm |
| Focal Length | 1325 mm |
| Focal Ratio | f/13 |
| Eyepiece Barrel Diameter | 1.25" |
| Diagonal | Integrated 90° flip |
| Finderscope | StarPointer |
| GO-TO Capability | Yes, NexStar controller |
| Tripod | Stainless steel legs Adjustable height Built-in equatorial wedge Weight 10 lb / 4.5 kg |
| Mount Type | Motorized alt-az Single-arm fork |
| Power Source | 8 x AA batteries |
| Optical Tube Length | 13.5" / 342.9 mm |
| Weight | 21.0 lb / 9.5 kg, OTA/Mount/Tripod |
| Packaging Info | |
|---|---|
| Package Weight | 38.0 lb |
| Box Dimensions (LxWxH) | 32.0 x 27.5 x 13.5" |
In the Box
Celestron NexStar 4 SE 102mm f/13 Maksutov-Cassegrain Go-To Telescope
- E-Lux 25.0mm 1.25" Eyepiece
- StarPointer Finderscope
- NexRemote Control Software CD
- The Sky CD-ROM Software for Windows
- RS-232 to Serial Port Cable - for GPS 16 Accessory
- NexStar Hand Controller
- Tripod with Accessory Tray
- Limited 2-Year Warranty
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Amazing - Stop Scrolling and Buy This Pillow
Size: Queen (Pack of 1), Color: White
I have been an Amazon customer ever since the very beginning, and this is my first review. Not because I haven’t purchased tons of amazing things (and a few bad ones), just never felt the need.
However, I researched pillows for longer than I care to admit, and decided on this one.
I’ve had it for about six months and absolutely love it. No lie, I genuinely look forward lying my big head on it after a long day.
I am a side sleeper, but flip flop all around through the night and it’s great in every position.
Pros:
Stays nice and cool, which is soothing regardless of the time of year.
Has a sort of quilted textured pattern on the zip up cover, gives it a luxury feel, that breaths nicely even when a pillow case is added.
The fill is fully adjustable to your preference.
I knew it came with extra filling but was worried it would not be enough. Wrong. It was very full and I ended up taking some out until it was perfect.
It comes vacuum sealed and suggests it may take some time to fully take shape. However, I found it to be about 90% almost instantly and was sleeping on it a couple hours later.
There was no unpleasant scent sometimes associated with memory foam items.
The foam itself is very nice, a mix of what appears to be shredded and cotton candy cloud like. Very brilliant idea, as it is somehow supportive, soft and firm all at once.
The affordability of this pillow compared to some of the others in this category can’t be overstated.
Oh, and the packaging was very thoughtfully and securely done.
If you are like me, an over thinker, I would suggest just taking this for a spin. It’s amazing.
I’m not a bot, or working for the company. I’m just truly satisfied, love this pillow, and have been sleeping great.
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Reviewed in the United States on April 6, 2026
★★★★★ 5
It's the perfect pillow!
Size: Queen (Pack of 1), Color: White
I purchased this pillow specifically for its customizable fill feature, which allows you to add or remove stuffing to suit your personal comfort needs. Due to the unique curvature of my cervical spine—forward at the neck rather than backward—I require a soft, semi-flat pillow rather than one that is thick or firm. Additionally, I often experience ear discomfort by morning, so a gentler surface is essential.
Upon adjusting the fill, I was pleasantly surprised by the generous amount of stuffing included. There was enough to fill an additional pillowcase, and I estimate it could easily create four to five more pillows. The ability to modify the pillow’s firmness at any time is an outstanding feature that makes it adaptable for a wide range of preferences and sleep styles.
This pillow has exceeded my expectations in both comfort and versatility. I highly recommend it to anyone seeking a personalized sleep experience.
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Reviewed in the United States on February 1, 2026
★★★★★ 4
Good quality pillows overall
Size: King (Pack of 2), Color: White
Got a set of these for my wife and myself as we were struggling with our old pillows. These have some really good qualities and some things we'd like to see changed.
First, the good: These are look and feel like they are high quality and made with good materials. The foam itself has a very nice feel to it. We love the fact they are adjustable to add or remove foam. They come with a pretty substantial amount already in the pillow. We appreciate the CertiPur certification.
Now the improvements or changes we'd like to see: The foam, while feeling great, doesn't bounce back well if you scrunch your pillows, and so every day you have to fluff and reshape the pillow, moreso than some other memory foam pillows we've owned. One side of the pillow is cooled and you can feel that even through the pillow case, and that's a great thing. However, one side is not cooled and we'd have preferred if both sides were made of the cooling material.
Overall, these are good pillows and we are not disappointed with the purchase. They are not, however, our perfect pillows (which do seem hard to find), and at some point in the future will probably make their way to the guest bedroom. We would rate them as some of the better pillows we've tried and feel most people would probably like them.
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Reviewed in the United States on December 19, 2025
★★★★★ 5
Perfect Pillow
Size: Queen (Pack of 1), Color: White
These are the best pillows ever. You can adjust the firmness or softness to whatever you want. For years i used a soft latex pillow , which you cant get anymore. I will never use another pillow. I have purchased 6 of these after the first one. You pick your own comfort level. Best ever. No more neck aches.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Hallelujah… finally, I found the right pillow!!!
Size: Queen (Pack of 1), Color: White
I have spent a lot of money searching for the right pillow. I recently tried to Tempur-pedic that cost twice with this pillow cost. Tempur-pedic flattened out. I’ve had this pill for a few weeks now and it works wonders. I am a paraplegic. You can have a lot of neck problems. I love the fact that this pillow is adjustable. I immediately saw it was too stuffy and took a bunch out. It works perfect so glad I didn’t spend money on a $200 purple pillow.
I read a lot of reviews and there were a lot of complaints about the odor. Mine did smell funny when it came out of the box. I immediately threw it in the dryer with a few bounce fabric sheets came out smelling fine.
Pillows are a very individual thing, but I think for 40 bucks this pillow is worth a try. I’m really enjoying mine about one of those silk pillowcases to go over it and it sleeps cool and comfortable. Best wishes in your search for the right pillow.
Update: I’ve been using this pillow several months and it continues. Give me a good night rest pain-free.. well worth the money.
UPDATE: I have been using this pillow for three months and it still works great. It does not flat out or get hot..
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Reviewed in the United States on January 29, 2026