Celestron · Maksutov-Cassegrain
Celestron NexStar 127SLT
127mm Maksutov-Cassegrain GoTo telescope that punches above its weight for planetary and lunar observing
Price updated Mar 22, 2026
Performance Scores
Overview
The Celestron NexStar 127SLT is a computerized Maksutov-Cassegrain telescope aimed at beginners and intermediate observers who want serious optical quality without a steep learning curve. The 127mm aperture and 1500mm focal length at f/11.8 make it a strong performer on planets and the Moon, where the long focal ratio rewards you with sharp, high-contrast views of Saturn's rings, Jupiter's cloud bands, and lunar craters in fine detail. Deep-sky objects like the Orion Nebula and globular clusters are within reach, though the narrower field of view means large diffuse objects are less impressive than they would be through a wide-aperture refractor or Newtonian.
The built-in GoTo mount holds a database of over 40,000 objects and aligns quickly using Celestron's SkyAlign method, which requires only three bright reference points. This makes it genuinely useful for observers who are still learning the sky. Tracking keeps objects centered as Earth rotates, which matters when you are sharing views with others or studying a target at high magnification.
At just over 8kg, it travels well. The StarPointer red-dot finder is functional but basic, and you will likely want additional eyepieces beyond what comes included. Overall, a solid choice if planetary viewing is your priority.
At a Glance
127mm
Aperture
f/11.8
Focal Ratio
8.21kg
Weight
1500mm
Focal Length
Specifications
Key Features
- The 127mm aperture and f/11.8 focal ratio deliver sharp, high-contrast planetary views that outperform most beginner telescopes of similar price
- GoTo mount with a 40,000-object database handles the sky navigation for you, letting you spend time observing rather than star-hopping
- SkyAlign calibration uses any three bright objects, so setup takes minutes even if you are unfamiliar with constellation patterns
- Motorized tracking keeps targets centered at high magnification, which is especially useful when sharing views with family or guests
- The Maksutov-Cassegrain design folds a 1500mm focal length into a compact tube, making the scope easy to transport and store
- Weighing just over 8kg, it is manageable enough for solo setups at a backyard observing site or a dark-sky location away from home
- Deep-sky performance is limited compared to wider-aperture designs, so observers focused primarily on galaxies and nebulae should consider alternatives
Customer Reviews
1,182 reviews
To begin, the photos are shaky and blurry because I shot them by trying to stick my phone close to the eyepiece, they do not do this scope justice, it is fantastic! I had very limited experience with telescopes, but the 127 SLT has blown away my expectations. I have seen the Orion's Nebula, rings of...
In my opinion, this is an excellent beginner/intermediate or advanced grab and go scope providing crisp images, ease of use and many desirable software capabilities. I recommend it. My training is in the physical sciences but not specializing in Astronomy or Astrophysics. I have always had interest ...
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