Telescope Celestron NexStar 5 SLT computerized 5-inch aperture (127 mm)

The Celestron NexStar 5 SLT computerized 5-inch aperture (127 mm) is a compact Schmidt-Cassegrain telescope that combines a versatile optical tube with a motorized alt-azimuth fork mount and computerized GoTo control. Designed for visual astronomy and entry-level astrophotography, this model offers a balance of portability and performance: a 127 mm primary aperture gathers enough light for detailed views of the Moon and planets, star clusters, and many brighter deep-sky objects. The integrated electronics and database simplify locating and tracking targets, while the compact form factor makes transport and setup practical for regular observing sessions.

Advantages

The NexStar 5 SLT provides automatic object location and tracking through its computerized GoTo system, reducing time spent on manual alignment and target searching. Its 127 mm aperture and Schmidt-Cassegrain optical design deliver a long effective focal length in a short tube, enabling higher magnifications for planetary and lunar observation while keeping the instrument portable. The alt-azimuth fork mount with motorized drives supports smooth manual pointing and accurate tracking for visual use and basic imaging, and the included database of celestial objects makes the system accessible to users with limited experience.

Suitable for

• Visual observation of the Moon and planets
• Viewing open and globular star clusters and brighter nebulae
• Beginner or hobbyist astrophotography with short-exposure planetary and lunar imaging
• Portable observing sessions and outreach events

Key specifications

• Aperture: 127 mm (5 inches)
• Optical design: Schmidt-Cassegrain
• Mount type: Motorized alt-azimuth fork mount with computerized GoTo control and tracking
• Focal length and focal ratio: compact optical tube providing long effective focal length suitable for higher magnifications (see manufacturer materials for exact focal ratio)
• Portability: lightweight compact tube and fork mount designed for field use and easy transport

How to use

Set the telescope on a stable surface or tripod and perform the initial alignment procedure following the on-screen prompts of the NexStar hand controller. Use the database and GoTo commands to select targets; the mount will slew automatically and then track the object. For visual observing, insert appropriate eyepieces to change magnification and refocus as needed. For basic astrophotography, attach a planetary camera or eyepiece camera to the visual back and use short exposures while relying on the mount's tracking. Power the system with a compatible DC source or battery pack as described in the manufacturer documentation.

Usage recommendations

Perform polarizing or star alignment at a stable location with a clear view of the sky and allow the telescope to cool to ambient temperature for best optical performance. Use low- to medium-power eyepieces for locating targets, then switch to higher-power eyepieces for detailed planetary views. For imaging, minimize vibration by using a remote shutter or camera control and avoid long exposures beyond the mount's unguided tracking capability.