StarGate 458mm f/4.1 Dobsonian Telescope for Astronomy - Sky-Watcher

Discover the universe with the Sky-Watcher Astrolitech 450mm f/4.1 Dobsonian Telescope. Designed for passionate amateur astronomers, this large-diameter instrument offers exceptional performance for deep sky and planetary observation.

Features:

• Aperture: 450 mm (BK7 glass parabolic primary mirror)
• Focal length: 1900 mm (f/4.1)
• Primary mirror: Conical and fused for rapid cooling and reduced weight (12 kg)
• Secondary mirror: 120 mm in diameter (central obstruction of 26.2%)
• Structure: Removable truss design with 6 "V" tubes for optimal portability
• Focuser: 50.8 mm Crayford with 1:10 fine focus and 31.75 mm adapter
• Mount: Non-motorized Dobson altazimuth
• Finder: 9x50 achromatic for easy locating of celestial objects
• Dust cover: Included to limit stray light
• Zenith height: 1.89 m
• Total weight: 50 kg (heaviest component: 12 kg primary mirror)
• Assembly time: About 25-30 minutes by one person

Benefits:

• Exceptional observation: Large diameter for detailed views of deep sky, revealing structures in galaxies, nebulae, and star clusters.
• Easy transport: Removable lightweight structure, allowing for transport by one person.
• High-quality mirrors: Conical and fused mirrors with multi-layer coating for 94% reflectivity.
• Precise focuser: Fine focusing thanks to the 1:10 reduction, ideal for high-magnification observations.

Tips and tricks:

• Assembly: Organize the parts during assembly to save time and carefully follow the user manual.
• Observation: With a zenith height of 1.89 m, a step stool is rarely needed.
• Recommended accessories: Use O-III or H-beta filters for observing nebulae.
• Balancing: The supplied counterweights allow adjustment of balance depending on the eyepieces or accessories used.

Delivered items:

• 450 mm f/4.1 Dobsonian optical tube
• Dobson altazimuth mount
• LET 28 mm eyepiece (50.8 mm fitting)
• 9x50 straight finder
• 50.8/31.75 mm Crayford focuser with 10:1 microfocuser
• 3 x 1 kg counterweights for balancing
• Dust cover
• User manual in French