Celestron NexStar 127 SLT MAK Telescope

Celestron’s innovative NexStar Star Location Telescope (SLT) has been a customer favorite for years thanks to its unique combination of high-quality optics, a user-friendly computerized interface, and a sturdy single fork arm mount.

This telescope comes with a pre-assembled, adjustable stainless-steel tripod, quick release fork arm, NexStar+ computerized hand control, 127mm Maksutov-Cassegrain optical tube, and lots of bonus accessories.

The entire telescope kit is a simple, no-tool assembly and fast SkyAlign alignment procedure will have you ready to observe in minutes. This makes NexStar 127SLT your perfect companion for impromptu observing sessions and all-night stargazing marathons alike.

Your NexStar 127SLT will reveal details of the lunar surface, Venus and its phases, the polar caps on Mars, Jupiter and its four moons, and Saturn with its rings plainly visible. It can also be used as a land-based spotting telescope for daytime and wildlife observations.

Maksutov-Cassegrain Optical Design:
- The MAK is a catadioptric telescope, which means the optical design includes both a lens and a mirror. The light coming through a MAK passes through the corrector lens to the primary mirror and back to a spherical secondary mirror before it hits the eyepiece. Images are bright, sharp, and virtually free of chromatic aberration.

The Maksutov-Cassegrain’s optical design offers several unique benefits. Instead of a secondary mirror, the MAK features a “secondary spot” of reflective coating applied directly to the inside of the corrector plate. Because of this, the telescope does not require frequent collimation like a Schmidt-Cassegrain. Also, the secondary spot is significantly smaller than a traditional Schmidt-Cassegrain secondary mirror, giving the MAK its signature high-contrast views.

One important thing to note about Maksutov-Cassegrain telescopes is that the larger, heavier Maksutov corrector plate takes longer to cool down and adjust to ambient air temperature compared to a Schmidt-Cassegrain of the same aperture.

Celestron’s innovative NexStar Star Location Telescope (SLT) has been a customer favorite for years thanks to its unique combination of high-quality optics, a user-friendly computerized interface, and a sturdy single fork arm mount.

This telescope comes with a pre-assembled, adjustable stainless-steel tripod, quick release fork arm, NexStar+ computerized hand control, 127mm Maksutov-Cassegrain optical tube, and lots of bonus accessories.

The entire telescope kit is a simple, no-tool assembly and fast SkyAlign alignment procedure will have you ready to observe in minutes. This makes NexStar 127SLT your perfect companion for impromptu observing sessions and all-night stargazing marathons alike.

Your NexStar 127SLT will reveal details of the lunar surface, Venus and its phases, the polar caps on Mars, Jupiter and its four moons, and Saturn with its rings plainly visible. It can also be used as a land-based spotting telescope for daytime and wildlife observations.



Maksutov-Cassegrain Optical Design
The MAK is a catadioptric telescope, which means the optical design includes both a lens and a mirror. The light coming through a MAK passes through the corrector lens to the primary mirror and back to a spherical secondary mirror before it hits the eyepiece. Images are bright, sharp, and virtually free of chromatic aberration.




The Maksutov-Cassegrain’s optical design offers several unique benefits. Instead of a secondary mirror, the MAK features a “secondary spot” of reflective coating applied directly to the inside of the corrector plate. Because of this, the telescope does not require frequent collimation like a Schmidt-Cassegrain. Also, the secondary spot is significantly smaller than a traditional Schmidt-Cassegrain secondary mirror, giving the MAK its signature high-contrast views.

One important thing to note about Maksutov-Cassegrain telescopes is that the larger, heavier Maksutov corrector plate takes longer to cool down and adjust to ambient air temperature compared to a Schmidt-Cassegrain of the same aperture.



The Mount & Technologies
Computerized AltAzimuth Mount – The NexStar SLT telescope features a single fork arm altazimuth mount, which allows the telescope to track the desired objects as they appear to move across the night sky. The mount sits on a pre-assembled, adjustable steel tripod.

NexStar+ Hand Control – This computerized hand control enables you to automatically slew to any of 40,000 celestial objects with the push of a button. The NexStar+ database includes more than 600 galaxies, 300 clusters and dozens of beautiful binary stars. Not sure what to observe? Choose the Sky Tour feature and the NexStar+ hand control will automatically generate a list of all the best celestial objects currently visible based on your exact time and location.

SkyAlign Technology – Our proprietary SkyAlign alignment procedure makes setting up and using a computerized telescope faster and easier than ever before. Point the telescope at three bright objects in the sky, and the telescope can triangulate its position and locate any other object in the sky automatically. You don’t need to know the names of the stars—you can even pick the Moon or bright planets! For more information about our SkyAlign technology, visit here.

Power – Go anywhere! Feel free to enjoy your NexStar SLT in remote dark sky locations—it’s powered by 8 AA batteries (not included) or a PowerTank portable battery (sold separately). The internal battery compartment provides power to the high precision servo motors for rigid low-vibration performance while eliminating cord wrap issues associated with external battery packs. You may also power your telescope with a 12V AC adapter (sold separately).

Accessories Included:
- Your telescope includes a StarPointer™ red dot finderscope, a star diagonal, and two eyepieces (25mm and 9mm). The two eyepieces offer different magnifications for low- or high-powered observing. The star diagonal provides a right-side-up view and a more comfortable viewing angle when looking up at the sky. The StarPointer™ red dot finderscope will help you quickly center an object in your eyepiece for easier observing.


Features:

- High quality 127 mm Maksutov-Cassegrain
- Fully computerized Altazimuth mount
- StarPointer™ finderscope to help with alignment and accurately locating objects
- Quick-release fork arm mount, optical tube and accessory tray for quick no tool set up
- Sturdy stainless steel tripod and accessory tray included
- Perfect for terrestrial and celestial observing
- BONUS Starry Night Special Edition Astronomy Software download with a 36,000-object database, printable sky maps and enhanced images including 3D renderings of stars, exoplanets, and galaxies


Specifications:

Optical Tube Info:
- Optical Design: Maksutov-Cassegrain
- Aperture: 127mm (5´´)
- Focal Length: 1500mm (59´´)
- Focal Ratio: f/12
- Focal Length of Eyepiece 1: 25mm (0.98´´)
- Magnification of Eyepiece 1: 60x
- Focal Length of Eyepiece 2: 9mm (0.35´´)
- Magnification of Eyepiece 2: 167x
- Finderscope: StarPointer™ red dot finderscope
- Star Diagonal: 1.25
- Optical Tube: Aluminum
- Highest Useful Magnification: 300x
- Lowest Useful Magnification: 18x
- Limiting Stellar Magnitude: 13
- Resolution (Rayleigh): 1.1 arc seconds
- Resolution (Dawes): 0.91 arc seconds
- Light Gathering Power (Compared to human eye): 329x
- Optical Coatings: Fully Coated
- Optical Tube Length: TBD
- Optical Tube Diameter: TBD
- Optical Tube Weight: TBD
- Dovetail: CG-5 Dovetail bar

Mount Info:
- Mount Type: Computerized Altitude-Azimuth Single Fork Arm
- Instrument load capacity: 8 lbs (3.6 kg)
- Height adjustment range (includes mount and tripod): 762mm - 1270mm (30´´ - 50´´)
- Tripod Leg Diameter: 31.75mm (1.25´´) Stainless steel
- Mount Head Weight: 5 lbs (2.3kg)
- Accessory Tray: Yes
- Tripod Weight: 5 lbs (2.3kg)
- Slew Speeds: 9 slew speeds - max speed 3°/second
- Tracking Rates: Sidereal, Solar and Lunar
- Tracking Modes: Alt-Az, EQ North and EQ South
- Dovetail Compatibility: CG-5 saddle plate
- Number of Auxiliary Ports: 1x AUX Port and 1x hand control Port (hand control can use either Port)
- USB Port: Yes, Input on hand control
- Motor Drive: DC Servo Motor
- Alignment Procedures: SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align
- Computerized Hand Control: 1 Hand Control Port and 1 AUX Port
- NexStar+ Database: Over 40,000 including 220 of the best deep sky and solar system objects
- Software: Celestron Starry Night Special Edition Software and SkyPortal App
- Total Kit Weight: TBD

Included:
- Optical Tube
- Single Fork Arm Mount and tripod
- Accessory Tray
- NexStar+ Hand Control
- 20mm and 9mm eyepiece
- StarPointer™ red dot finderscope
- 1.25´´ Star Diagonal

Solar Warning:
- Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.
- Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.
- Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.


Technologies:

- Computerized AltAzimuth Mount – The NexStar SLT telescope features a single fork arm altazimuth mount, which allows the telescope to track the desired objects as they appear to move across the night sky. The mount sits on a pre-assembled, adjustable steel tripod.

NexStar+ Hand Control – This computerized hand control enables you to automatically slew to any of 40,000 celestial objects with the push of a button. The NexStar+ database includes more than 600 galaxies, 300 clusters and dozens of beautiful binary stars. Not sure what to observe? Choose the Sky Tour feature and the NexStar+ hand control will automatically generate a list of all the best celestial objects currently visible based on your exact time and location.

SkyAlign Technology – Our proprietary SkyAlign alignment procedure makes setting up and using a computerized telescope faster and easier than ever before. Point the telescope at three bright objects in the sky, and the telescope can triangulate its position and locate any other object in the sky automatically. You don’t need to know the names of the stars—you can even pick the Moon or bright planets! For more information about our SkyAlign technology, visit here.

Power – Go anywhere! Feel free to enjoy your NexStar SLT in remote dark sky locations—it’s powered by 8 AA batteries (not included) or a PowerTank portable battery (sold separately). The internal battery compartment provides power to the high precision servo motors for rigid low-vibration performance while eliminating cord wrap issues associated with external battery packs. You may also power your telescope with a 12V AC adapter (sold separately).

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