Celestron AstroMaster 90 EQ Telescope

The Celestron AstroMaster 90 EQ is a powerful refractor telescope designed for both astronomical and terrestrial viewing. With a 90mm aperture and 1000mm focal length, it delivers bright, clear images of celestial objects such as the Moon, planets, and bright deep-sky objects. The German equatorial mount allows for precise tracking of stars as they move across the night sky.

Advantages

This telescope offers excellent light-gathering capability and high-resolution optics, making it ideal for beginners and intermediate astronomers. The pre-assembled stainless steel tripod provides stability, and the included StarPointer finderscope simplifies target acquisition. The fully coated glass optics enhance image brightness and contrast.

Suitable for

• Amateur astronomers looking for a reliable refractor telescope
• Observing the Moon, planets, and bright deep-sky objects
• Terrestrial viewing with the erect image diagonal
• Users who prefer a German equatorial mount for tracking

Key specifications

• Optical Design: Refractor
• Aperture: 90 mm (3.54 inches)
• Focal Length: 1000 mm
• Focal Ratio: f/11.1
• Mount Type: German Equatorial (EQ)
• Finderscope: Built-in StarPointer
• Eyepieces Included: 20mm (50x), 10mm (100x)
• Eyepiece Barrel Diameter: 1.25 inches
• Diagonal: 90° Erect Image Diagonal
• Optical Coatings: Fully Coated Glass Optics
• Highest Useful Magnification: 213x
• Lowest Useful Magnification: 13x
• Limiting Stellar Magnitude: 12.3
• Resolution (Rayleigh): 1.55 arc seconds
• Resolution (Dawes): 1.29 arc seconds
• Light Gathering Power (vs. human eye): 165x
• Tripod: Pre-assembled Stainless Steel with Accessory Tray
• Software Included: Starry Night Basic Edition
• Optical Tube Material: Aluminum

Recommendations

For best results, use the telescope in a dark location away from city lights. Allow the optics to acclimate to outdoor temperatures for optimal performance. The included Starry Night software is a great tool for planning observing sessions.