Sky-Watcher Stargate 450P Truss-Tube Dobsonian Telescope
Sky-Watcher SKU: S11900 | Helix SKU: CTS11900
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
Specifications:
| SKU | S11900 |
| UPC | 050234119009 |
| 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 | |
| Focuser | 2″ Dual Speed Crayford |
| Zenith Eyepiece Height | 74.5″ |
| OTA Length (Retract/Ext.) | 78.75″ |
| OTA Outer Diameter | 20.5″ |
| Dob Base Weight | 40 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) | 129 lbs |
| Accessories | |
| Included Finder | 9×50 Finder |
| Included Diagonal | No |
| Included Eyepieces | 28 LET/10mm/Coll. |
| Magnification w/ Included Eyepieces | 68x/190x |
| Included Case | No |
| Corrector | No |
| Other Included Accessories | 2.3lbs counter weights (3), Shroud, Truss clamps |
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Fast Shipping & Professional Packing
We have a range of shipping options due to our long-term partnership with UPS FedEx DHL. Our warehouse personnel will pack every item to our exacting specifications. Prior to shipping your items will be thoroughly examined and secured. Each day, we ship to thousands of clients in many countries. This demonstrates our dedication to become the biggest online retailer on earth. There are distribution centers and warehouses located in Europe and the USA.
Note: Orders that include more than one item are assigned a processing time depending on the item.
We will carefully examine all items ordered before shipping. Today, the majority of orders will be shipped within 48 hours. Delivery time ranges between 3-7 days.
Returns
Stock is dynamic, and cannot be fully controlled by us because of the involvement of many entities, including the factory as well as our warehouse. This means that the actual stock could alter at any time. It's possible that you may not receive your order once the order has been made.
Our policy runs for 30 days. If you have passed 30 days without a trace since the purchase however, we're unable to give you a refund or exchange.
In order to be eligible for a refund your product must be unopened and in the same condition as when you received it. It must also be returned in its original packaging.
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