- All Products
- Shop by Brands
- BW Technologies
- BW Technologies
- BW Technologies Monitors
- Models
- BW Clip
- BW Clip4
- GasAlertClip Extreme
- GasAlert Extreme
- GasAlertMicroClip XT
- GasAlertMicroClip XL
- GasAlertMicroClip X3
- GasAlertQuattro
- GasAlertMax XT II
- GasAlertMicro 5 Series
- SamplerPak
- IntelliDox Docking System
- MicroDock II
- BW Ultra
- BW Solo
- Gas Monitors
- Gas Monitor Manufacturers
- BW Technologies
- Bacharach
- Biosystems
- Crowcon
- Draeger
- Gas Clip Technologies
- GfG Instruments
- GMI/Detcon
- Honeywell Analytics
- Industrial Scientific
- IGD
- mPower
- MSA
- RAE Instruments
- RKI Instruments
- WatchGas
- Calibration Gas
- Combustion Analyzers
- Water Quality
- Reliability Instruments
- Refractometers
- HVAC
- Weather
- Temperature
- Laboratory
- Sound
- IAQ
- Electrical
- All Categories
Sky-Watcher Stargate 450P SynScan Truss-Tube GoTo Dobsonian Telescope - S11920
Item #:
SW-S11920
Brand:
Sky-Watcher
Share this product:
S11920 Stargate 450P SynScan Truss-Tube GoTo Dobsonian Telescope by Sky-Watcher
Our superior optics just got better
Stargate's feature Sky-Watcher's exclusive fused conical parabolic mirrors. The fused design allows for thinner mirror construction that provides faster cooling and lighter weight.
Combined with the cast cellular secondary mirror and Sky-Watcher's exclusive 94% reflectivity coatings, Stargate delivers bright, detailed views of your favorite deep sky objects. The 18 inch model captures 27% more light than our 16 inch, while the 20 inch (a full half meter of aperture) boasts a monster 56% more light gathering power.
Solid foundations, easy assembly
The minimalist all-metal structure of the Stargate produces a sturdy and stable platform while maintaining a convenient and compact footprint. The truss-tubes break down to a very manageable 36 inch length for easy transport. Azimuth and altitude bearings are steel and Teflon for smooth, steady movement.
Setting up a Stargate is a simple procedure, taking only about 20 minutes. Spring loaded truss anchor points are clearly labeled to eliminate any frustration or confusion. Adjustable feet make leveling a snap.
- Fused conical primary mirror
- Cellular secondary mirror
- Dual speed 2" Crayford focuser
- Two section truss poles (compact transport)
- Minimalist, all metal construction
- Fast f/4.1 optics for short eyepiece heights
- 18" provides 27% more light than a 16" telescope
- 94% reflectivity coatings
- Freedom Find, dual encoders
- SynScan with 42,000+ object database
| SKU | S11920 |
| Optical Info | |
| Optical Design | Newtonian |
| Mirror Coatings | 94% Aluminum |
| Glass Type | Borosilicate |
| Primary Aperture (mm) | 458 | F/Ratio | 4.14 |
| Focal Length (mm) | 1900 |
| Secondary Diameter | 120mm |
| Secondary Obstruction (by diameter) | 26% |
| Secondary Obstruction by Area | 7% |
| Observational Info | |
| Dawes Limit | 0.25 |
| Rayleigh Limit | 0.31 |
| Limiting Mag. | 15.9 |
| Minimum Magnification | 65 |
| Maximum Magnification | 902 |
| Light Gathering (compared to next size down) | 27% |
| General Info | |
| GoTo | Yes |
| Object Database | 42,900+ |
| Dual Encoders | Yes |
| Focuser | 2" Dual Speed Crayford |
| Zenith Eyepiece Height | 74.5" |
| OTA Length (Retract/Ext.) | 78.75" |
| OTA Outer Diameter | 20.5" |
| Dob Base Weight | 66 lbs |
| Upper Cage Weight | 11 lbs |
| Truss Pole Weight | 2.6 lbs each. 16 lbs total |
| Mirror Box Weight | 62 lbs |
| Full Assembled Weight (with weights) | 155 lbs |
| Accessories | |
| Included Finder | 9x50 Finder |
| Included Diagonal | No |
| Included Eyepieces | 28 LET/10mm/Coll. |
| Other Included Accessories | 2.3lbs counter weights (3), Shroud, Truss clamps |




















