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Télescope Dobson Skywatcher N 458/1900 StarGate-450P DOB View larger

Sky-Watcher StarGate 458 mm GoTo Truss Dobsonian – 18" Motorized

Dobson 458 mm Sky-Watcher

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Sky-Watcher StarGate 458 mm GoTo Truss Dobsonian – 18" Motorized

Motorized 458 mm f/4.1 Dobsonian with SynScan GoTo and truss structure. Locates and tracks 42,900+ objects for powerful visual observing.

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Sky-Watcher StarGate 458 mm GoTo Truss Dobsonian – 18" Motorized

Sky-Watcher STARGATE Dobsonians with their huge light gathering capabilities provide the ultimate WOW factor experience for aficionados of visual astronomy, delivering outstanding performance on both Planetary and Deep-Sky objects.  The elegant and rigid all metal truss tube design is easily transportable when unassembled, and can be assembled and ready for use in about 20 minutes. The mount provides motorised operation in both Alt and Azimuth axes, and can slew the telescope automatically to, and track over 42,900 night sky objects from the Synscan handset's extensive computerised database. Features Freedom-Find™ Dual-Encoder technology, which also allows the telescope to be moved manually in either axis without losing it's alignment or positional information, giving the user enormous convenience and flexibility during observing sessions. Simply push the telescope close to the object and let the computer do the rest of the work!

  • Magnifications (with Eyepieces supplied): x68 & x190
  • Highest Practical Power (Potential): x916
  • Diameter of Primary Mirror: 458mm
  • Telescope Focal Length: 1900mm (f/4.1)
  • Eyepieces Supplied: 10mm (1.25") & 28mm (2”)
  • Collimating Eyepiece (1.25")
  • Dual-Speed 2" Crayford Focuser with 1.25” adaptor
  • Parabolic Primary Mirror (Patented weight saving design)
  • 120mm Secondary Mirror
  • 9x50 Finderscope
  • Direct SLR Camera Connection
  • Fabric Light Shroud
  • Alt-Azimuth Go-To mount (Metal construction)
  • Transmission: Worm + Timing Belt + 64 Micro-step/0.9º Stepper Motor Drive
  • Patented 'Freedom-Find' Dual-Encoder design allows manual movement without losing positional information
  • Pointing Accuracy: Up to 5 arc-minutes (RMS)
  • Gear Ratio: Azimuth 400, Altitude 1523.796
  • Synscan Computerised Handset with 42,900+ Object Database
  • Power requirement: DC11V/5A ~ 15V/3A
  • 31% more Light Gathering than 400mm
  • Max Height: 2100mm, Base Diameter: 590mm, Max Horizontal Radius: 1900mm
  • Overall Weight 80kg

 

7.jpgPARABOLIC PRIMARY MIRRORS
Features High Quality Parabolic Primary Mirrors to eliminate spherical aberrations inherent in 'fast' focal lengh reflectors with spherical primary mirrors. The mirrors are parabolized to bring all the light rays to the same focal point to give sharp, constrasty images, which are full of detail.
SKY-WATCHER DELUXE MIRROR COATINGS
Most reflectors today usually have a coat of aluminium as the mirror surface and then an overcoat of silicon monoxide or silicon dioxide to protect it. Silicon dioxide produces a much more durable coat than silicon monoxide but requires specialized equipment to apply it and is therefore more expensive. Protection is needed, because in most reflectors, the mirror is open to the elements and deterioration of the reflective layer reduces the resolution of the telescope. ALL Sky-Watcher reflectors are Multi-Coated with Silicon Dioxide as standard for Optimum Durability and Long Term Performance.

Technical Specifications

  • Type: Motorized truss Dobsonian telescope

  • Aperture: 458 mm

  • Focal Length: 1900 mm

  • Focal Ratio: f/4.1

  • Primary Mirror: Parabolic

  • Resolving Power: 0.27 arcsec

  • Max Useful Magnification: 900x

  • Limiting Magnitude: 15.9

  • Structure: Serrurier truss tube, collapsible

  • Focuser: 2" Crayford with 10:1 microfocuser and 1.25" adapter

  • Mount: Motorized dual-axis GoTo Dobsonian (SynScan)

  • Tracking: Integrated encoders and motors

  • Controller: SynScan hand controller with 42,900+ object database

  • Power Supply: 12V DC (not included)

  • Finderscope: 9x50

  • Included Accessories: Super 10 mm and 25 mm eyepieces

  • Total Weight: approx. 60 kg (tube + base)

Additional Information

  • Automation: GoTo pointing and sidereal tracking

  • Design: open truss tube for thermal balance and portability

  • Use: ideal for advanced astronomers and astronomy clubs

  • Assembly: tool-free with secure locking system

  • Application: high-end visual astronomy with expert-grade optics