Dobson Telescope StarGate 508mm f/3.9 - Sky-Watcher

Explore the universe with the Sky-Watcher StarGate 508mm f/3.9 Dobsonian Telescope. Designed for passionate amateur astronomers, this large-aperture telescope offers exceptional performance for deep-sky and planetary observation.

Features:

• Aperture: 508 mm (BK7 glass parabolic primary mirror)
• Focal length: 2000 mm (f/3.9)
• Primary mirror: Conical and fused for quick cooling and reduced weight (20 kg)
• Secondary mirror: 136 mm in diameter (central obstruction of 26.8%)
• Structure: Removable truss with 6 'V' tubes for optimal transportability
• Focuser: 50.8 mm Crayford with 1:10 fine focus and 31.75 mm adapter
• Finderscope: 9x50 achromatic for easy location of celestial objects
• Dust cover: Included to reduce stray light
• Height at zenith: 2 meters
• Total weight: 70 kg (heaviest element: 20 kg primary mirror)
• Assembly time: About 25-30 minutes by one person

Advantages:

• Exceptional observation: Large aperture for detailed observations of deep sky, revealing structures in galaxies, nebulae, and star clusters.
• Easy transport: Removable structure with lightweight elements, allowing transport by one person.
• High-quality mirrors: Conical and fused mirrors with multi-layer coating for 94% reflectivity.
• Precise focuser: Fine focusing thanks to 1:10 reduction, ideal for high magnifications.
• Observation comfort: Dust cover to limit stray light and improve contrast.

Tips and tricks:

• Assembly: Organize the parts during assembly to save time and carefully follow the user manual.
• Observation: Consider a step stool to reach the focuser when the telescope is pointed at the zenith.
• Recommended accessories: Use O-III or H-beta filters for observing nebulae.
• Balancing: The provided counterweights allow adjustment of balance depending on the eyepieces or accessories used.

Included items:

• StarGate 508 mm f/3.9 Dobsonian optical tube
• Dobsonian altitude-azimuth mount
• LET 28 mm eyepiece (1.25 inch)
• Straight finder 9x50
• 50.8/31.75 mm Crayford focuser with 10:1 microfocuser
• 3 x 1 kg counterweights for balancing
• Dust cover
• User manual in French