Télescope Dobson StarGate 458/1900 Sky Watcher

Discover the universe with the Sky-Watcher Astrolitech 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: 450mm (BK7 glass parabolic primary mirror)
• Focal Length: 1900mm (f/4.1)
• Primary Mirror: Conical and fused for rapid cooling and reduced weight (12kg)
• Secondary Mirror: 120mm diameter (26.2% central obstruction)
• Structure: Dismountable rocker box with 6 V-shaped tubes for optimal transportability
• Eyepiece Holder: Crayford 50.8mm with 1:10 microfocuser and 31.75mm adapter
• Mount: Non-motorized Dobson azimutal mount
• Finder: Achromatic 9x50 for easy location of celestial objects
• Dew Shield: Included to limit stray light
• Height at Zenith: 1.89m
• Total Weight: 50kg (heaviest element: primary mirror at 12kg)
• Assembly Time: Approximately 25-30 minutes by one person

Advantages:

• Exceptional Observation: Large diameter for detailed observations of deep-sky objects, revealing structures in galaxies, nebulas, and star clusters.
• Ease of Transport: Dismountable structure in lightweight components, allowing transport by one person.
• High-Quality Mirrors: Conical and fused mirrors with multi-layer coating for 94% reflectivity.
• Precise Eyepiece Holder: Fine focus thanks to the 1:10 microfocuser, 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 1.89m, a ladder is rarely needed.
• Recommended Accessories: Use O-III or H-beta filters for observing nebulas.
• Balancing: The included counterweights allow adjustment of the balance depending on the eyepieces or accessories used.

Delivered Elements:

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