Sky-Watcher Stargate 450P SynScan GOTO 18″ Truss Dobsonian
| Article number: | S11920 |
| Availability: | More on the Way to us |
| Delivery time: | More on the Way to Us |
- 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
| Optical Design |
Dobsonian |
|---|---|
| Primary Aperture (mm) |
458mm (18”) |
| Secondary Diameter (mm) |
120mm minor axis |
| Secondary Obstruction by Area |
7% |
| Mirror Coatings |
94% Aluminum |
| Glass Type |
Borosilicate |
| Focal Length (mm) |
1900mm |
| Focal Ratio |
4.1 |
| Light Gathering (compared to next size down) |
Captures 27% more light than a 16” telescope |
| Zenith Eyepiece Height |
74.5” |
| Rayleigh Limit |
0.31 |
| Dawes Limit |
0.25 |
| Limiting Magnitude |
15.9 |
| Minimum Magnification |
65x |
| Maximum Magnification |
902x |
| GoTo |
Yes |
| Object Database |
42900+ |
| Dual Encoders |
Yes |
| Focuser |
2″ Dual Speed Crayford |
| Included Eyepieces |
28mm LET eyepiece and 10mm eyepiece |
| Included Finder |
9×50 |
| Other Included Items |
2.3lbs counter weights (3), Shroud, Truss clamps |
| Upper Cage Weight |
11lbs. |
| Truss Pole Weight |
2.6lbs each. 16lbs total |
| Mirror Box Weight |
62lbs. |
| Dobsonian Base Weight |
66lbs. |
| Fully Assembled Weight (with weights) |
155lbs. |
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