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Celestron - NexStar 127SLT Computerized Telescope - Compact and Portable - Maksutov-Cassegrain Optical Design - SkyAlign Technology - Computerized Hand Control - 127mm Aperture

4.3 4.3 out of 5 stars 1,297 ratings

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127 SLT Maksutov
Telescope Only

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About this item

  • COMPUTERIZED STAR LOCATING TELESCOPE: The Celestron NexStar 127SLT offers a database of more than 40,000 stars, galaxies, nebulae, and more. Simply choose an object and the telescope finds it for you in the night sky and tracks it as it moves.
  • MAKSUTOV-CASSEGRAIN OPTICAL DESIGN: With a large, 127mm aperture, the NexStar 127SLT can gather enough light to see our Solar System and beyond. View Saturn’s rings, Jupiter’s cloud bands, the Moon's craters, and the Orion Nebula in brilliant detail.
  • COMPACT AND PORTABLE: The ideal telescope for adults and kids to use together, the NexStar 127SLT is compact, lightweight, and portable. It's easy to transport just about anywhere—your favorite campsite, a dark sky observing site, or simply the backyard.
  • FAST SETUP WITH SKYALIGN: Celestron’s proprietary SkyAlign procedure has you ready to observe in minutes. Center any 3 bright objects in the eyepiece and the NexStar SLT aligns to the night sky, ready to locate thousands of objects.
  • UNBEATABLE WARRANTY & SUPPORT: Buy with confidence from Celestron, a leading telescope brand in California since 1960. Your purchase includes a 2-Year US Warranty and unlimited support from our team of US-based experts.
  • BONUS FREE STARRY NIGHT SOFTWARE: Your Celestron NexStar 130SLT includes a free download of Starry Night Special Edition, one of the top-rated astronomy software programs. Simulate the sky, learn about celestial objects, & plan your observing session.
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Celestron - NexStar 127SLT Computerized Telescope - Compact and Portable - Maksutov-Cassegrain Optical Design - SkyAlign Technology - Computerized Hand Control - 127mm Aperture
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Price-24% $531.34
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-18% $440.72
List:$539.95
-6% $599.95
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$44.40
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Customer Ratings
Easy to assemble
4.4
4.4
4.2
3.5
Portability
3.8
3.8
3.7
2.9
Easy to use
3.7
3.7
3.3
4.7
For beginners
3.6
3.6
3.7
3.1
Stability
3.6
3.6
3.8
Sold By
Amazon.com
Amazon.com
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focus type
Manual Focus
Manual Focus
Manual Focus
Manual Focus
Manual Focus
eye piece lens
Plossl
Plossl
Plossl
Barlow
Barlow
objective lens diameter
127 millimeters
90 millimeters
130 millimeters
127 millimeters
25 millimeters
aperture diameter
127 millimeters millimeters
90 millimeters millimeters
130 millimeters millimeters
telescope mount
Altazimuth Mount
Altazimuth Mount
Altazimuth Mount
Equatorial Mount
lens coating
Fully Coated
Fully Multi-Coated

What's in the box

  • StarPointer finderscope, 25mm eyepiece (60x) -
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    Product Warranty: For warranty information about this product, please click here [PDF ]

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    Celestron

    Celestron - NexStar 127SLT Computerized Telescope - Compact and Portable - Maksutov-Cassegrain Optical Design - SkyAlign Technology - Computerized Hand Control - 127mm Aperture


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    Product Description

    Building on the popularity of our NexStar 114SLT telescope, the 127SLT by Celestron inspires us to go bigger, with 20% more light-gathering power than our 114mm telescope. The Celestron NexStar 127SLT is a computerized telescope that offers a database of more than 40,000 stars, galaxies, nebulae, and more. The telescope locates your object with pinpoint accuracy and tracks it. At the heart of the telescope’s Maksutov-Cassegrain optical design, a large 127mm primary mirror gives fully color-corrected views ideal for astronomical use. The 127SLT comes with a fully computerized NexStar+ hand control. The computerized hand control gives you the ability to automatically slew to any object.

    This telescope for adults and kids to be used together is ideal for weekend camping trips or excursions to dark sky sites. Its compact form factor makes it easy to transport and assemble just about anywhere. With its pre-assembled, adjustable steel tripod, the NexStar 127SLT can be up and ready to use in a matter of minutes. Our SkyAlign alignment technology and the included StarPointer Finderscope with a red LED make aligning a breeze. Simply center any three bright objects in the eyepiece and the NexStar SLT aligns to the night sky, ready to locate thousands of objects. The NexStar 127SLT Computerized GoTo Telescope also includes a download of our Starry Night Special Edition astronomy software for an interactive sky simulation.

    The power of this computerized telescope allows you to view the details of the lunar surface, the rings of Saturn, the polar ice caps on Mars, the cloud belts on Jupiter, and a number of the Messier objects, such as the globular cluster in Hercules (M13) or the Great Nebula in Orion (M42). Explore some of the fainter Messier objects using the additional light-gathering capabilities of the 127SLT’s five-inch primary mirror.

    Buy with confidence from the world’s #1 telescope brand, based in California since 1960.

    Customer reviews

    4.3 out of 5 stars
    4.3 out of 5
    1,297 global ratings

    Customers say

    Customers like how easy it is to set up and use the telescope. They say it is a great product that produces clear and sharp images. They are also satisfied with the value of the telescope, but some customers have reported issues with the alignment process. Customers have mixed opinions on quality, performance, tracking, and focus.

    AI-generated from the text of customer reviews

    80 customers mention63 positive17 negative

    Customers find the setup of the telescope to be easy and quick. They mention that it's a great product and fun right from the start. Some say that the assembly went well. Overall, most are satisfied with the ease of setup and use of the product.

    "...There are cheaper telescopes out there, but for ease of use, I just can't think of a better alternative than this 127 SLT NexStar+ system...." Read more

    ".../intermediate or advanced grab and go scope providing crisp images, ease of use and many desirable software capabilities. I recommend it...." Read more

    "...90 SLT pros: features to price ratio, easy connection for DSLR/Mirrorless with a T-Ring adapter90 SLT cons: Sky-Align proving fussy..." Read more

    "...easy to do, and after only a couple of observing sessions, is completely intuitive. The goto finding feature is also very accurate...." Read more

    61 customers mention44 positive17 negative

    Customers like the image quality of the telescope. They mention that it provides a very clear view, even with light pollution. The optics are good and clear, and everything appears to be built well for this. The scope can give you some great views of the night sky, the moon, and planets. Some say that the alignment is a little difficult.

    "...The Mak gives a better image across the field of view, without the coma of a Newtonian...." Read more

    "...excellent beginner/intermediate or advanced grab and go scope providing crisp images, ease of use and many desirable software capabilities...." Read more

    "...Now for the optics. They are beautiful. The scope puts up great sharp images. You feel like you're orbiting the moon...." Read more

    "...But overall, I am not happy with the optical performance and the software issues." Read more

    40 customers mention34 positive6 negative

    Customers like the value of the telescope. They mention that it has a great features to price ratio, and is a good telescope for performance and price. Some say that the optical tube assembly is already worth the money.

    "...The clothes pin is cheap and easy. Good buy for the price." Read more

    "...90 SLT pros: features to price ratio, easy connection for DSLR/Mirrorless with a T-Ring adapter90 SLT cons: Sky-Align proving fussy..." Read more

    "...All in all a very good scope for the money. The focal length is long which means a more powerful scope, but the field of view is smaller...." Read more

    "...go to and tracking performance of this mount is actually, impressive for the price range...." Read more

    167 customers mention113 positive54 negative

    Customers are mixed about the quality of the telescope. Some mention it's a very nice telescope, has excellent optics, and is the best buy for such a nice telescope. However, others say that the tripod is a bit flimsy, wobbly, and the batteries will only last one night.

    "...Once focus is acheived though, and the scope settles down, the views are great...." Read more

    "...Other than that. No issues. The batteries are actually holding up better than expected. The tripod has been acceptable and doesn’t bother me at all...." Read more

    "In my opinion, this is an excellent beginner/intermediate or advanced grab and go scope providing crisp images, ease of use and many desirable..." Read more

    "...I have heard that the batteries will only last one night, so getting rechargeable batteries would be the best best over regular batteries...." Read more

    50 customers mention26 positive24 negative

    Customers are mixed about the performance of the telescope. Some mention that it works fairly well, while others say that it doesn't work very well. The finder function and the go to function are not always accurate enough to put your target inside the field of view.

    "...This one works very well and tracks well. It’s not perfectly accurate at alignment but I haven’t tried to do the 3 star alignment either...." Read more

    "...Puts 'No response' error on the handset. I spent an entire evening winnowing through the 'help' files on the Celestron site...." Read more

    "...The filters help.So far everything works beautifully. My only two complaints are not vital but more nuisance..." Read more

    "...things - it becomes very difficult to move the scope, and the goto function was shot - it was not finding objects any more...." Read more

    31 customers mention15 positive16 negative

    Customers are mixed about the tracking of the telescope. Some mention that it tracks very well, and the tracking function makes it a joy to use. However, others say that setting up the auto tracking was a little difficult, and that the GPS can take some time to sync. They also mention that the tracking will drift a bit and that calibration takes forever.

    "...This one works very well and tracks well. It’s not perfectly accurate at alignment but I haven’t tried to do the 3 star alignment either...." Read more

    "...-that the GPS can take some time to synch -- be patient, I was not and had some self inflicted difficulties the first time I used the Mak...." Read more

    "...right over to another star, back around, etc and it's still tracking very well. I upped it to 5 stars because it really can't get any better...." Read more

    "...Maksutov cons: not as "fast" and limited deep sky compared to refractors, long cooldown time..." Read more

    24 customers mention9 positive15 negative

    Customers are mixed about the focus of the telescope. Some mention that the bands of Jupiter and the Galilean moons are pretty bright, and the views of the moon and sunspots are very distinguishable. They also say that the telescope can find and see the moon, but just barely. They can easily see the phases of Venus, detailed items on the moon. However, others say that it jitters so badly it's nearly impossible to focus, and that the focus is touchy and vibrates even with a touch.

    "...It's a bit tricky to focus, as the image will easily show any motion from the focuser knob, but this is mainly a mount limitation...." Read more

    "...You get stunning views of the moon and sunspots are very distinguishable with this scope...." Read more

    "...The tripod has been acceptable and doesn’t bother me at all. The focus is touchy but there are hacks for the shaking...." Read more

    "...BE SURE TO GET THE MOON FILTERS! Even with the filter, the moon was super bright!" Read more

    42 customers mention11 positive31 negative

    Customers find the alignment of the telescope to be difficult. They mention that the auto-align feature doesn't work, the finder scope is a nightmare to align, and the mount does not align or track well. Some customers also mention that sky-aligne is fussy and stops working at first.

    "...This one works very well and tracks well. It’s not perfectly accurate at alignment but I haven’t tried to do the 3 star alignment either...." Read more

    "...90 SLT cons: Sky-Align proving fussyI tried 3-star alignment on two occasions. Once from a Bortle 4 and once from a Bortle 3...." Read more

    "...The NexStar program and alignment are easy to use and provide a better that ballpark result when going to an object...." Read more

    "...it doesn't magnify the image, so the accuracy in alignment is limited, 2)..." Read more

    For Mak Lovers
    4 Stars
    For Mak Lovers
    I have a love for Maksutov-Cassegrain telescopes. Started with an 80mm x 500mm f/6.3 MTO 3M-6A. Moved up to a C90 Mak. Wanted a go-to so I traded laterally to this NexStar 90 SLT. Same 90mm x 1250mm f/13.9 as the C90.Maksutov pros: portability, planetary use, no collimation, meniscus corrector designMaksutov cons: not as "fast" and limited deep sky compared to refractors, long cooldown time90 SLT pros: features to price ratio, easy connection for DSLR/Mirrorless with a T-Ring adapter90 SLT cons: Sky-Align proving fussyI tried 3-star alignment on two occasions. Once from a Bortle 4 and once from a Bortle 3. Neither time would the scope "go to" Saturn after alignment. I'm sure it's operator error and I have to practice more. Went out in the field once and discovered Solar tracking not straightforward to unlock. I watched a tutorial and took notes so I'm sure the second time will be a success. (UPDATE: Solar Tracking successfully unlocked and working. YAY!)This telescope is PERFECT for APS-C cameras vs The Moon or The Sun (NEVER AIM YOUR TELESCOPE OR CAMERA AT THE SUN WITHOUT A SOLAR FILTER FOR THE PROTECTION OF YOUR EYES AND EQUIPMENT)With a level and balanced setup, Lunar tracking has been a breeze. As I said any other failures are likely on my part for planetary and solar go-to and tracking. Practice makes perfect. I'm still learning the NexStar system. I wish to expand my skills and get to Venus, Jupiter, Saturn and appropriate deep sky objects. This is a package I can definitely grow into.Attached pictures taken with the Celestron NexStar 90 SLT and a Sony a6300 APS-C Mirrorless camera. No images were stacked, these are single frame:Waxing Crescent final edit from ARW fileAbstract Image final edit from ARW file (tracked the Moon and it went behind a tree - took unfocused shot to show the donut shaped bokeh of the reflex lens)3x eyepiece projections onto a6300 sensor of Moon Details final edit from ARW fileSolar image final edit from ARW file (I used a Spectrum Telescope Glass Solar Filter ST425G)(UPDATE: Solar closeup image - final edit from 12 ARW files, aligned & stacked)I also attached a chart showing how much of the sensor on APS-C is covered by the Moon. It would be the same coverage for the Sun as well.If Lunar and Solar observation/imaging is a primary focus for choosing a scope, the 90 SLT is a great choice. It is less of a "tight fit" to get the Moon or Sun onto an APS-C sensor than the 127 SLT to ensure you are imaging in the clearest part of the lens (the middle). Also, there is more weight left over to add camera/accessories onto the 90 SLT and not overburden the 8lb payload capacity of the mount vs the 127 SLT.Bonus feature for me: I plan on adding a small (perhaps 90mm x 500mm) achromatic refractor to my arsenal sometime in the future and the mount should be able to handle that well.
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    Top reviews from other countries

    Translate all reviews to English
    Amazon Customer
    5.0 out of 5 stars Good telescope and leaves you wanting more
    Reviewed in the United Kingdom on February 11, 2024
    Style: 127 SLT MaksutovSet: Telescope OnlyVerified Purchase
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    Amazon Customer
    5.0 out of 5 stars Good telescope and leaves you wanting more
    Reviewed in the United Kingdom on February 11, 2024
    I'm not professional, these are just my impressions.

    WARNING 1: this might be a begining of an expensive hobby! You will likely want accessories, filters, eyepieces, and maybe larger aperture for deep sky. Search for what you can see with a telescope (especially if you're interested in Nebulae/galaxies) if it's you first one to manage expectations.

    WARNING 2: you won't see details and colours you see in pictures online including mine (except maybe for Moon). Cameras are far more sensitive and have longer exposures than our eyes. Search Orion Nebula or M81 through a 5, 8, 10 inch telescope for example to have an idea and compare with pictures.

    Overall, I'm very happy with the telescope, optics seem quite good without noticeable chromatic aberrations, tracking is OK with options to fine-tune during use.

    After using this, I'm curious to try something with a larger aperture to see more details in deep sky, but it doesn't mean I'm enjoying this telescope any less. For me it hits a good balance of power, ease of use, and portability. Though 8-inch aperture ones would probably last you much longer if you're going to get into the hobby more seriously, those are much more expensive and heavy.

    You are paying a premium for goto functionality and compact design compared to some other 5-inch options, but I found goto to be very helpful especially at first.

    This vs a Dobsonian:
    Observing with a tripod is so much easier especially when what you're looking at is low. Optical tube is much more compact compared to Dob of comparable aperture and f-ratio, but later would probably be cheaper. As far as I can tell, a typical Newtonian reflector would be far less tolerant to collimation issues than this design. Learning with this is certainly easier.

    If it's your first telescope - be prepared you won't see the colours and details you see in pictures online. Those are captured with cameras with longer exposures and higher sensitivity than human eyes and are heavily processed. This being said, I got this picture of Orion Nebula with an old unmodified DSLR through this telescope in a single exposure, no stacking or additional hardware.

    What can you see?
    Moon - amazing! Very bright, very sharp clear small details, no weird colours.
    Planets - they appear about small pea-sized, rings of Saturn are clearly visible, as well as bands of Jupiter (in colour). You can get them bigger with additional eyepieces or Barlow lenses, but with ones I got (admittedly not the highest quality) I couldn't see more details - same thing just bigger and a little blurrier.
    Deep sky objects - probably the coolest thing to photograph, but visually seeing it for the first time it's amazing how dim those are in general. I could see Orion Nebula and some other DSOs. In Orion Nebula I could see general shape, but no colour when observing from Peak District. You can probably see more from a darker site, but I haven't tested it. Overall the aperture is considered small for visual DSO observation, but I could see something.
    Moon, snow, atmospheric conditions (e.g. turbulent air) will all affect your observation. Relative positions of earth to other planet also affects the details you see.

    Mount, focuser etc:
    I've read complaints about the mount not being sturdy enough online. It's definitely more shaky than a heavy Dobsonian, but for me it's perfectly useable. You do need to wait a couple seconds after adjusting focus for it to get stable, but you absolutely can get clear view and pictures after that.
    GoTo depends on how good your alignment is and has couple clever features - there is a "precision goto" option in the menu where it first navigates to nearby easy to see object for you to correct error and then it goes to actual target.
    Mount doesn't fold flat with optical tube as SE model does.
    The tripod is a bit bigger than a typical photo tripod when folded.
    If you're thinking of getting this and using mount for later optical tube upgrades, search for mount limits - you probably won't put much more onto it. I've read online people ignoring limits and putting 6se and even 8se on it, but it will be even shakier and I have no idea how long it will last if you did it and I doubt warranty will cover it.

    You need to align red dot finder and the telescope before observation, otherwise finding anything is very difficult.

    The mount is Alt-Az, as opposed to equatorial if it makes difference for you.
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    2 people found this helpful
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    alexandre alpeyrie
    5.0 out of 5 stars On se fait vraiment plaisir !
    Reviewed in France on November 11, 2023
    Style: 90 SLT MaksutovSet: Telescope OnlyVerified Purchase
    One person found this helpful
    Report
    Adán Ugarte Pineda
    5.0 out of 5 stars Nitidez espectacular
    Reviewed in Mexico on May 3, 2021
    Style: 127 SLT MaksutovSet: Telescope OnlyVerified Purchase
    3 people found this helpful
    Report
    Alex Birratrek
    5.0 out of 5 stars Ottimo acquisto
    Reviewed in Italy on October 16, 2022
    Style: 127 SLT MaksutovSet: Telescope OnlyVerified Purchase
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    Alex Birratrek
    5.0 out of 5 stars Ottimo acquisto
    Reviewed in Italy on October 16, 2022
    Ottimo telescopio al quale per migliorare l’esperienza ho aggiunto il modulo skyq 2 wifii col quale posso fare tutto da app del cellulare, e per astrofotografia suggerisco una buona fotocamera astronomica asi oppure il supporto per cellulari ma serve pazienza per calibrarlo. Il telescopio è adatto ai pianeti e luna e qualche galassia, davvero un bellissimo acquisto, per il cielo profondo bisogna salire di categoria ma fidatevi, con questo vi divertirete tantissimo
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    45 people found this helpful
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    Solo
    5.0 out of 5 stars Muy entretenido
    Reviewed in Spain on October 4, 2022
    Style: 90 SLT MaksutovSet: Telescope OnlyVerified Purchase
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    Solo
    5.0 out of 5 stars Muy entretenido
    Reviewed in Spain on October 4, 2022
    Lo cierto es que me ha sorprendido. Es muy fácil de manejar. El mando es muy intuitivo. Hay un pequeño desajuste en la velocidad pero nada que no se pueda resolver profundizando en el menú, supongo. Al principio cuesta alinear correctamente pero al final se consigue. Es un poco frágil el trípode. Vibra con una ligera brisa. Supongo que sí le añades unos pequeños soportes que vienen en las instrucciones como recomendado quizá sea un poco más estable. Habrá que probarlo. Como en casi todos le hace falta algunos oculares más y una barlow 2X o 3X mínimo. Y de ahí en adelante. Todo depende del bolsillo. Eso sí, se echan de menos los cables de conexión para el PC(obligatorio para utilizar el software al que hace referencia CELESTRON) y una fuente de alimentación de 12 V(fija o para coche) para ser la compra perfecta. Especiae te porque el consumo de baterías es alarmante. Por supuesto nada que no se pueda resolver con baterías recargables de calidad(16 mínimo para quita y pon) o un powerbank...
    En resumen, un poco más robusto en su base y algunos extras necesarios serían la compra perfecta para cualquiera que quiera pasar buenos ratos viendo planetaria y poco más. Para lo demás(cielo profundo) hay inevitablemente que subir el rango de precios. No queda otra.
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    6 people found this helpful
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