Telescope Dobson StarGate 458/1900 Skywatcher

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-space and planetary observation.

Features:

• Aperture: 450 mm (BK7 glass primary mirror)
• Focal Length: 1900 mm (f/4.1)
• Primary Mirror: Conical and fused for quick cooling and reduced weight (12 kg)
• Secondary Mirror: 120 mm diameter (26.2% central obstruction)
• Structure: Dismountable rocker box with 6 V-shaped tubes for optimal transportability
• Porte-ocular: Crayford 50.8 mm with 1:10 magnification and 31.75 mm adapter
• MOUNT: Non-motorized Dobson altazimuthal
• Finder: Achromatic 9x50 for easy location of celestial objects
• Dust Cover: Included to limit stray 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 observations of deep space, revealing structures in galaxies, nebulae, and star clusters.
• Easy Transport: Dismountable structure into lightweight elements, allowing transport by one person.
• High-Quality Mirrors: Conical and fused mirrors with multi-layer coating for 94% reflectivity.
• Precise Porte-ocular: Fine focusing thanks to the 1:10 magnification, ideal for high-magnification observations.

Tips and Tricks:

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

Supplied Elements:

• Dobson 450 mm f/4.1 optical tube
• Azimutal Dobson mount
• LET 28 mm eyepiece (50.8 mm threaded)
• 9x50 right-angle finder
• Crayford 50.8/31.75 mm focuser with 10:1 microfocuser
• 3 counterweights of 1 kg for balancing
• Dust cover
• User manual in French