Refractor/Reflector Telescope Celestron NexStar 6" SLT — 6" (150 mm) aperture, 1500 mm focal length

The Celestron NexStar 6" SLT is a computer-assisted 6-inch (150 mm) aperture telescope with a 1500 mm focal length designed for visual observation and entry-level astrophotography. The optical configuration provides a balanced combination of resolution and light-gathering power, enabling detailed views of planets, the Moon, star clusters and brighter deep-sky objects. The built-in computerized GoTo system and automatic alignment simplify finding and tracking targets across the sky, making the instrument suitable for hobbyists and amateur astronomers who want a portable, feature-rich instrument.

Advantages

The NexStar 6" SLT integrates a 150 mm aperture with a long focal length to deliver good planetary detail and sufficient reach for many deep-sky subjects. The computerized GoTo mount with automatic alignment reduces setup time and assists in locating thousands of catalogued objects, while motorized tracking keeps objects in the field of view during observation or short-exposure imaging. The optical tube is compact for a 6-inch instrument, aiding portability and storage. Controls and menus are designed for straightforward operation by users with basic astronomical knowledge.

Suitable for

• Visual observation of planets, Moon and bright deep-sky objects
• Beginner to intermediate astrophotography with short exposures
• Star-hopping assistance and automated locating of catalogued objects
• Portable observing sessions and field use

Key specifications

• Aperture: 150 mm (6 inches)
• Focal length: 1500 mm
• Optical design: Schmidt-Cassegrain style (compact reflector with corrector plate)
• Focal ratio: f/10
• Mount type: Altazimuth computerized GoTo mount with motorized tracking
• Finder scope: Included (typically red dot or small optical finder)
• Suitable eyepiece range: standard 1.25" eyepieces
• Portability: compact optical tube suitable for transport and storage

How to use

Set up the NexStar 6" SLT on a stable surface and attach the optical tube to the altazimuth mount following the manufacturer's mounting points. Power the controller, perform the automatic alignment routine as described in the user interface, and select targets from the handset database to engage the GoTo motors. Use 1.25" eyepieces to frame objects at different magnifications and adjust focus with the focuser. For short-exposure astrophotography, attach a compatible camera using the appropriate T-adapter or visual back and use the mount's tracking to maintain target position during exposures.

Usage recommendations

For the best visual performance, allow the telescope to reach thermal equilibrium with the outdoor temperature before beginning detailed observing. Use low-to-moderate magnifications for deep-sky objects and higher magnifications for planetary detail. When attempting astrophotography, start with short exposures and use stable power and a secure tripod to minimise vibration. Regularly check and tighten mounting connections and follow the manufacturer's maintenance guidance.