Home Comparisons Celestron Nexstar 127 Sltvs Celestron Nexstar 130 Slt – Which Is The Better Slt For Beginners And Intermediates?

Celestron Nexstar 127 Sltvs Celestron Nexstar 130 Slt – Which Is The Better Slt For Beginners And Intermediates?

by Rizka Amir
Celestron Nexstar 127 Sltvs Celestron Nexstar 130 Slt

Choosing the right telescope is a combination of many factors. The decision becomes even harder because of the brands, models and series of telescopes available. Take a look at CELESTRON NEXSTAR 127 SLT VS CELESTRON NEXSTAR 130 SLT where we will analyze these popular and highly functional reflector Newtonian telescopes and figure out the best option for you.

Dealing with telescopes and other optical devices has taught me many things about said telescopes. Hi, my name is BLANK and I have been a physics lecturer for 20 years. In my profession, I have come across all sorts of sky gazing devices, some different in working principle, others different simply by brand. Similarly, I have come across all sorts or telescope users, armatures and advanced. With this information I was able to narrow down one of Celestron’s very capable and handy series of telescopes that are great for all types of users. This CELESTRON NEXSTAR 127 SLT VS CELESTRON NEXSTAR 130 SLT is going to critically analyze what either options have to offer and why. In case you were wondering, both these telescopes belong to the SLT line and are both are popular, reputable options among their individual categories.

Take a look at my guide to CELESTRON NEXSTAR 127 SLT VS CELESTRON NEXSTAR 130 SLT for more on this topic.

What are the differences between the CELESTRON NEXSTAR 127 SLT and the CELESTRON NEXSTAR 130 SLT

Aperture 120mm, 1500mm Focal length, f/12.5 Focal ratio and 60X magnification. Comes with the following included accessories : 2 eyepieces (20mm and 9mm)
Aperture 130mm, 650mm Focal length, f/5 Focal ratio and 26X, 72X magnification. Comes with the following included accessories : 2 eyepieces (20mm, 9mm) and red dot finder scope
Maksutov-Cassegrain Style telescope
Newton Reflector Style Telescope
Computerized AltAzimuth Mount with single fork arm
Altitude Azimuth mount

CELESTRON NEXSTAR 127 SLT VS CELESTRON NEXSTAR 130 SLT- How to they compare to one another?

Working Principles

From the table above, we mention the Celestron 130SLT is a different style of telescope compared to the 127 SLT model. This difference is based on the operating principle each of these telescopes uses to help you see far away objects. If you are not familiar with the types of telescopes and how they differ, you are not alone. The Newton reflector style telescope on the SLT 130 utilizes a curved mirror located at the back that will light the tube. This typing in telescope is founded on the basis that telescopes are designed with mirrors, lenses or both mirrors and lenses. In the Newtonian reflector telescope design, a small mirror diagonally placed reflects the image that is redirected to the eyepiece. Many beginners and amateur utilize Newtonian style telescopes before they move on to other types of telescopes.

Alternatively, the 127 SLT utilizes the Maksutov-Cassegrain optical system, which is considerably different from Newtonian reflectors. First off, the MAK telescopes are categorized as catadioptric or compound telescopes unlike the 130 SLT that is a reflector type telescope. Additionally, these telescopes often use a combination of lenses and mirrors, hence the category label; compound telescopes. A unique correcting lens with a thick meniscus is used to alter the MAK design and distinguish it from the Schmidt Cassegrain style, to which it is closely related.


Optics refers to the mirrors and lenses on the telescope and everything pertaining to them. It is an essential parameter that directly influences if the telescope will work or not. Because these are both line of telescopes you can expect the same optic systems right? Not entirely true. Some of the optical aspects of the 127 SLT include the following: a 127mm or 5 inch aperture, 1500mm focal length and f/12 focal ratio. These are great stats for beginner- intermediate telescopes to help view lunar features, planets, and other objects sometimes even objects in deep space. Alternatively the 130 SLT is equipped with the following optical elements: aperture 130mm, 650mm Focal length, f/5 Focal ratio and 26X, 72X magnification.

Focal ratio is usually the result of dividing the focal length by the aperture measurements. Focal ratio implies the speed of your telescopes optics. This is important because different ranges of focal ratios are suitable for different functions. For instance, ratios between f/4 to f/5 are considered fast focal ratio and are great for wide field observation and even deep space astronomy.

TIP: You can think of the 127 SLT as a closed tube telescope and the 130 SLT as an open tube telescope.

Beginner friendliness

While both these instruments feature several beginner friendly aspects, however, one of the biggest issues for beginners is often the setting up and alignment portion of the process. Celestron includes features such as the Sky align and star sense to help the user track and locate their desired object to view: and align itself properly for successful viewing.


This is one of the elements that play an important part in telescope capabilities. The eyepieces that come as accessories with telescope purchases are utilized for this purpose. Using these eye pieces, you can adjust magnification as you see fit. However, over magnifying for example can cause the image to blur and get worse. Optimal magnification depends on many things including the type of eyepiece on your telescope or even atmospheric conditions.

The NexStar 127 SLT can achieve a magnification of 60X with the first 25mm eye piece, and a 167X magnification with the second 9mm eyepiece. Additionally, the lowest practical magnification you can achieve with this instrument is 18X while the highest theoretical magnification is 300X.

Alternatively, the NexStar 130 SLT delivers a basic 26X-72X magnification. Additionally, it has the capacity to achieve 307X as its highest useful magnification.


CELESTRON NEXSTAR 127 SLT Overview and Key features
NexStar 127SLT Computerized TelescopeLike the name suggests, this Star Locating telescope is a computerized instrument that is both easy to use but still very accurate and dependable. The quality optics on this instrument, coupled with its features and performance are among the reasons this tool is such a favorite. Here are some of the key features that make the 127 SLT so capable.

Optics on the 127 SLT as advertised are very capable with this Maksutov –Cassegrains. This term may sound familiar if you have come across the different types of compound/hybrid telescopes. Focusing this telescope simply involves turning a knob located on the sides to adjust the positioning of the primary mirror. The telescope is equipped with a focal ratio f/12, an aperture of 127mm and a 1500mm focal length.

In terms of mounts, the 127 SLT is equipped with an automated Alt-Az mount. This is a basic option for many telescopes, but it is a dependable option. The Altitude Azimuth in addition to the single fork arm that will come in handy when it comes to tracking. This mount is placed on a pre assembled steel tripod that is adjustable: a feature many beginners not used to setting up will appreciate. Running on 8 double A batteries (8AA), this telescope will run throughout an observing experience. However, this is as far as it will go.

In addition to its user friendliness, the CELESTRON NEXSTAR 120 SLT allows its users to access the Starry Night Astronomy software that contains over 36k celestial objects. If you chose to, you can print out these 3D renderings of stars from this database. Additionally, you may access pictures of different galaxies and exoplanets.

All things considered, the 127SLT is more of a planetary and lunar scope. It performs quite well and is quite portable, but has some limitations in regards to use in deep space viewing and imagery. With this purchase, you will receive several accessories, including 2 eyepiece, the 20mm and 9mm.

What we like

  • Easy to assemble without tools
  • Quality optics
  • Light weight instrument that is easy to move around
  • Brilliant Lunar images
  • Compact gadget
  • Allows access to large database for tracking, locating and even learning purposes

What we don’t like

  • The price is not worth the aperture
  • The viewfinder is made of plastic

What you can see with the NexStar 127 SLT

With this telescope, you have the capacity to view the following:

  • Detailed moon surface features
  • Mars’ polar caps
  • Jupiter and its moons
  • Saturn’s rings
  • Can be used outside visual astronomy for daytime use or wildlife viewing


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CELESTRON NEXSTAR 130 SLT Overview and Key features

NexStar 130SLT Computerized Telescope

The 130 SLT by Celestron is a Newton Reflector telescope designed for powerful, yet simple use. Because of the 130mm aperture on this model, it is known as the 130 SLT. If you know your Celestron series history, then you know this is an upgrade from the 114mm, its predecessor. It is part of the Celestron NexStar (SLT) Star Location Telescope. Among the features that make this telescope so wonderful include the following.

The 130 SLT boasts a user friendly yet capable system that is mounted on its sturdy computerized AltAzimuth mount which is single forked to allow the telescope to track an object. Because it comes with an easy to assemble set up, you can have this telescope ready for use as you please.

With this device you have access to the NexStar database includes over 600 galaxies and more. One thing to love about the 130SLT is the SkyTour feature. When you are new to star gazing, it might be difficult to choose what you want to see but you can rely on the Sky Tour feature which generates an entire list of the best objects to view at your time and location. Powered by 8 double A batteries which provides enough energy for

Accessory-wise, you will receive a red dot finder scope two eyepieces, 25mm and 9mm, to add varying magnification for a difference in observing. Additionally, you receive a star diagonal which provides a right side you for a more comfortable experience.

Like with many Celestron NexStar purchases, you will receive access to the Starry night Software which will teach you about the night sky and its celestial bodies.

What we like

  • Compact portable and easy to use
  • Great warranty deal and customer support
  • Access to a learning database great for beginners
  • Easy and fast set up
  • It is a computerized telescope with database of stars, nebulae, galaxies and even more

What we don’t like

  • The customer support is great on paper but somewhat frustrating to deal with in reality
  • Poor battery performance
  • Instrument is weak towards vibrations

What you can see with the NexStar 130 SLT

With this telescope, you have the capacity to view the following:

  • Lunar surface details
  • Phases of Venus
  • Jupiter’s moons
  • Saturn and its rings


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The Newtonian style telescope is the best starter telescope for adults, children, anyone really looking to get into telescopes. As such, based on the features, capabilities and performance on either model, the winner between CELESTRON NEXSTAR 127 SLT VS CELESTRON NEXSTAR 130 SLT will have to be the 130 SLT. It better equipped to serve a variety of users from beginners to advancing intermediates.

Frequently asked Questions

What does SLT mean?

According to CELESTRON, the makers of both these telescopes, SLT stands for STAR LOCATION TELESCOPE. It is a line of innovative computerized telescopes designed not only to provide high quality optics but to engage the user at different levels using a friendly interface.

How do you use the Celestron 127 SLT telescope?

This telescope is primarily a lunar and planetary viewing scope which you can easy assemble, set up and use. Because of the technologies incorporated into the design, beginners need not worry about things like alignment or tracking and location of celestial objects that they would like to view.

What can I see with Celestron NexStar 130 SLT?

Apart from planets and other planetary features like their respective moons or bands and rings, you can use the SLT 130 couple with other efficient instruments to view and photograph objects in deep space easily.


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