Télescope Dobson StarGate 458/1900 Sky-Watcher

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

Features:

• Aperature: 450 mm (BK7 glass parabolic primary mirror)
• Focal Length: 1900 mm (f/4.1)
• Primary Mirror: Conical and fused for fast cooling and reduced weight (12 kg)
• Secondary Mirror: 120 mm diameter (26.2% central obstruction)
• Structure: Dismantable rocker with 6 V-shaped tubes for optimal portability
• Eyepiece Holder: Crayford 50.8mm with 1:10 microfocusing and 31.75 mm adapter
• Mount: Non-motorized Dobson altazimuth
• Finder: Achromatic 9x50 for easy celestial object location
• Dust Cover: Included to reduce parasitic light
• Height at Zenith: 1.89 m
• Total Weight: 50 kg (heaviest element: primary mirror, 12 kg)
• Assembly Time: Approximately 25-30 minutes by one person

Advantages:

• Exceptional Observation: Large diameter for detailed deep-sky observation, revealing structures in galaxies, nebulae and star clusters.
• Easy Transport: Dismantable structure into lightweight elements, allowing transport by one person.
• High-Quality Mirrors: Conical and fused mirrors with multilayer coating for 94% reflectivity.
• Precise Eyepiece Holder: Fine focusing thanks to the 1:10 microfocusing, ideal for high-magnification observation.

Tips and Tricks:

• Assembly: Organize parts during assembly to save time and carefully follow the user manual.
• Observation: With a height at zenith of 1.89 m, a step stool is rarely needed.
• Recommended Accessories: Use O-III or H-beta filters for nebula observation.
• Balancing: The provided counterweights allow adjusting the balance according to the eyepieces or accessories used.

Delivered Elements:

• Dobson 450 mm f/4.1 optical tube
• Non-motorized Dobson altazimuth mount
• LET 28 mm (50.8 mm) eyepiece
• 9x50 right finder
• Crayford 50.8/31.75mm eyepiece holder with 10:1 microfocusing
• 3 x 1 kg counterweights for balancing
• Dust cover
• User manual in French