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!
The heart of any Dobsonian telescope is in the quality of its mirror optics. The accuracy of the figure, the material they are made from and the coatings applied all play an important part towards the telescope’s performance. Sky-Watcher’s prowess and reputation for commercial mirror making is well known and one of the jewels in its crown. Sky-Watcher are experts in this field and has demonstrated its unwavering ability to produce telescope mirrors of consistent high quality over decades. Parabolic (or Paraboloidal) mirrors are a complex shape so need to be well made to provide the high performance expected of them. A properly figured parabolic primary mirror will eliminate spherical aberrations by bringing the light rays to the same focal point. Sky-Watcher’s diffraction-limited parabolic primary mirrors will produce sharp, contrasty images that are full of detail.
The Stargate 500P FlexTube Synscan Dobsonian’s primary & secondary mirrors are made from special Low-Expansion Borosilicate glass, similar to Pyrex, which has an exceptionally low coefficient of thermal expansion compared to regular glass types. In practice this means a quicker cool-down time to reach thermal equilibrium, without the reliance on a cooling fan, and during the cool-down process the mirrors will maintain a better shape, reducing distortions, allowing you to start observing sooner.
Both primary and secondary mirrors are finished with Sky-Watcher’s exquisite RAQ™ Radiant Aluminium Quartz coatings, which include layers of aluminium, dielectric tantalum pentoxide for enhanced reflectivity & protection and silicon dioxide, all combining for a brilliant, highly durable finish with 94% reflectivity that will last for years.
Egenskaper:
- Magnifications (with Eyepieces supplied): x100 & x160
- Highest Practical Power (Potential): x1016
- Diameter of Primary Mirror: 508mm
- Telescope Focal Length: 2000mm (f/4)
- Eyepieces Supplied: 12.5mm & 20mm (1.25″) 70º wide angle
- Collimating Eyepiece (1.25″)
- Dual-Speed 2″ Crayford Focuser with 1.25” adaptor
- Parabolic Primary Mirror (Patented weight saving design) & secondary mirror with Radiant™ Aluminum Quartz (RAQ™) coating providing up to 94% reflectivity with optimal durability and long term performance
- 136mm Secondary Mirror
- 9×50 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
- 61% more Light Gathering than 400mm
- Overall Weight 90kg
