Highlights Fused conical primary mirror
Cellular secondary mirror
2" dual-speed Crayford focuser
Two section truss poles provide compactness for easy transport
Spare, all metal design
Fast f/4.1 optics for short eyepiece heights
18" aperture gathers 27% more light than a telescope with 16" aperture
94% reflectivity coatings
Freedom Find dual encoders
SynScan with database of over 42,000 objects
For the purists who would rather invest in optics than in electronics,
the Skywatcher Dobsonian N 458/1900 StarGate-450P telescope is a dream!
The Dobsonian telescope with truss tube, mirrors and a lightweight
construction collects a great deal of light, but despite its size, it is
still relatively easy to transport.
Sky&Telescope awarded both motorized Stargate versions with GoTo control: Skywatcher Dobson N 458/1900 Stargate-450P Synscan GoTo telescope Skywatcher Dobson N 508/2000 Stargate-500P Synscan GoTo telescope They
are equipped with the tried and tested SynScan control system, which
helps you to find celestial objects and then automatically guides the
With the amazingly modular and completely computerized Skywatcher 18”
GoTo Stargate Dobsonian you can delve into deep space from your own
backyard or a dark-sky site and experience intricate celestial details
that are normally only seen in photographs! With the computerized
SynScan hand controller, you can quickly find over 42,000 objects and
enjoy the dust lanes and detailed arm structures of galaxies and the
glowing star nurseries of hundreds of nebulae. The Sky-Watcher 18”
Stargate GoTo Truss Tube Dobsonian gathers a whopping 27% more light
than a big 16” Dob, and on a still, dark night, you’ll be amazed at how
much more you’ll see!
Fast Optics for Reasonable Eyepiece Height
The Skywatcher 18” Stargate has a fast f/4.1 focal ratio to enhance
light-gathering and keep the eyepiece height to a maximum of 74.5” at
zenith. This means that while you will need a step-stool or ladder to
view objects high overhead, most adults will be able to forego the use
of a ladder when objects are closer to the horizon.
The GoTo version of the 18” Stargate Truss Tube Dobsonian uses
Skywatcher's tried-and-true SynScan computerized system. The
electronics and motors are built into the base, and the SkyScan hand
controller is your easy to use interface. You can choose from multiple
tracking rates (sidereal, solar or lunar) and the object database has
42,000+ celestial objects that include those from the Messier, NGC, IC,
SAO, Caldwell, Double Star, Variable Star and Named Star catalog as well
as, of course, the planets. The Freedom Find™ dual-encoder technology
from Sky-Watcher ensures precise tracking when manually moving the
telescope in both axes without sacrificing alignment. This gives users a
high level of convenience and flexibility not offered in telescopes
without dual encoders. For more information on pointing accuracy,
encoder resolution, and the motors see the specifications below.
The 18” fused conical parabolic primary mirror is exclusively
designed for the Skywatcher Stargate. It’s thinner construction is
lighter in weight than a traditional primary and allows the mirror to
cool down more quickly. Both the Stargate primary and the cast cellular
secondary are topped with 94% reflective coatings, for bright, sharp
views at a limiting magnitude of 15.9. The dual-speed 2” Crayford
focuser is sturdy and lets you make coarse and fine adjustments, and the
included 2” to 1.25” adapter allows you to use 1.25” eyepieces and
accessories as well as 2”.
Modular Components for Easy Transport
The Skywatcher Stargate Truss-Tube Dobsonian is quite striking to
look at and is designed to break down into several pieces for easy
transport and storage. When unassembled, it can look a bit daunting to
put together, but due to labeled truss anchor points, you can assemble
your Stargate Dob in short order! Each of the components is made of
metal, including the truss tubes, azimuth and altitude bearings, base,
mirror box, and secondary/focuser structure with a built-in light
shield. The six truss tubes each separate into two pieces that are only
36” long, making it easier to store and transport. You will love the
smooth, easy movements in both altitude and azimuth due to the steel
bearings and a Teflon surface. Three 2.3 pound counterweights
(included) allow you to adjust balance, and adjustable feet on the base
assist you in leveling the telescope.
Comes with Finder, Two Eyepieces, Shroud, and More!
The Skywatcher 18” GoTo Truss Tube Stargate Dob comes with several
accessories so that you can start observing right out of the box.
Sky-Watcher has included two eyepieces (28mm and 10mm) for low and
medium magnification options. A 9x50 optical finderscope is also part
of the package, and a collimation eyepiece will help you keep your
optics aligned. To increase your contrast and protect your mirror from
light bounce and dew, a ribbed fabric shroud is included. Finally, a 12V
DC power cord comes with this SynScan telescope package, but you will
need to provide your own power supply. See specifications and/or
instruction manual for more information.
Focal Length (mm)
(3) 2.3 lbs.
Yes - 2
Yes - 9 x 50
Power Adapter Included?
No - Sold
AC or DC
Height at Zenith (in.)
Base Weight (lb.)
Total Weight (lb.)
155 In the Box
Sky-Watcher 18" Stargate GoTo Truss-Tube Dobsonian
Cast Metal Rocker and Base with Teflon Bearings
SynScan Computerized Handbox with 42,000+ Object Database
2" Crayford Dual-Speed Focuser
28 mm LET Eyepiece
10 mm Eyepiece
(3) 2.3 lb. Counterweights