Sky-Watcher Stargate 500P 20″ Truss Dobsonian
| Article number: | S11910 |
| 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/3.95 optics for short eyepiece heights
- 20” provides 56% more light than a 16” telescope
- 94% reflectivity coatings
| Optical Design |
Dobsonian |
|---|---|
| Primary Aperture (mm) |
508mm (20”) |
| Secondary Diameter (mm) |
134mm minor axis |
| Secondary Obstruction by Area |
7% |
| Mirror Coatings |
94% Aluminum |
| Glass Type |
Borosilicate |
| Focal Length (mm) |
2000mm |
| Focal Ratio |
3.95 |
| Light Gathering (compared to next size down) |
Captures 56% more light than a 16” telescope |
| Zenith Eyepiece Height |
79” |
| Rayleigh Limit |
0.28 |
| Dawes Limit |
0.23 |
| Limiting Magnitude |
16 |
| Minimum Magnification |
72x |
| Maximum Magnification |
1000x |
| GoTo |
No |
| 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 |
12lbs. |
| Truss Pole Weight |
2.6lbs each. 16lbs total |
| Mirror Box Weight |
70lbs. |
| Dobsonian Base Weight |
40lbs. |
| Fully Assembled Weight (with weights) |
138lbs. |
Related products
