Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
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You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we replace it. We make sure your product arrives exactly as you would expect it to; we promise.
We also ensure privacy protection. We never keep any of your credit card information on file and any of your personal data is stored according to our policies.
30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
Product Description
The Quattro imaging Newtonian is an affordable, large aperture astrograph, ideal for users searching for a fast imaging system that will work for both astrophotography and visual astronomy. Boasting a swift f/4 focal ratio, this astrograph is can produce an exposure 6x faster than the average 8-inch f/10 Schmidt Cassegrain telescope. Although designed as an imaging optical tube, these Newtonians also produce bright and detailed viewing for visual astronomy.
Like all Sky-Watcher reflectors, the Quattro imaging Newtonian features borosilicate mirrors coated with Sky-Watcher's proprietary Radiant Aluminum Quartz (RAQ), producing 94% reflectivity. The tube is constructed with rolled steel, then coated with Sky-Watcher's signature glossy metal-flake Black Diamond finish. The OTA uses an oversized secondary mirror providing greater illumination for DSLRs and CCDs using full-frame sensors, and an optional coma corrector is available for those who want to take their imaging to the next level.
Included with the Quattro imaging Newtonian is a 10:1 dual-speed 2-inch Crayford-style focuser, 1.25 and 2-inch eyepiece adapters, a 9x50 finderscope, tube rings, and a V-style dovetail plate.
What can I see with a Sky-Watcher Quattro 250P 10" Imaging Newtonian Telescope OTA (S11220)?
Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.
Jupiter with
25mm Eyepiece - 40x Magnification
(Sold Separately)
Jupiter with
10mm Eyepiece - 100x Magnification
Sold Separately
Jupiter with
5mm Eyepiece - 200x Magnification
Sold Separately
Moon with 25mm Eyepiece
40x Magnification
(Sold Separately)
Moon with 10mm Eyepiece
100x Magnification
Sold Separately
Moon with 5mm Eyepiece
200x Magnification
Sold Separately
Andromeda with 36mm Eyepiece
28x Magnification
Sold Separately
Andromeda with 25mm Eyepiece
40x Magnification
(Sold Separately)
Andromeda with 10mm Eyepiece
100x Magnification
Sold Separately
What's in the Box
Specifications
Optical Info | |
Optical Design | Newtonian |
Mirror Coatings | Radiant Aluminum Quartz (RAQ) coatings with 94% reflectivity |
Glass Type | Borosilicate |
True Aperture (mm) | 257 |
Primary Aperture (mm) | 254 |
F/Ratio | 4 |
Focal Length (mm) | 1000 |
Secondary Diameter | 89mm |
Secondary Obstruction (by diameter) | 35% |
Secondary Obstruction by Area | 12% |
Observational Info | |
Dawes Limit | 46% |
Rayleigh Limit | 0.55 |
Limiting Mag. | 14.5 |
Minimum Magnification | 36 |
Maximum Magnification | 500 |
Light Gathering (compared to next size down) | 57% |
General Info | |
Focuser | 2" Dual Speed Crayford |
OTA Length (Retract/Ext.) | 36.5" |
OTA Outer Diameter | 11.375" |
OTA Weight (with accessories) | 36.5 |
Accessories | |
Included Finder | 9x50 Finder |
Included Diagonal | No |
Mounting Accessories | Rings/V-Rail |
Included Eyepieces | None |
Included Case | No |
Corrector | No (optional) |