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SkyWatcher Flextube 250 SynScan Dobsonian 10-inch Collapsible Computerized GoTo Large Aperture Telescope, White, (S11810)

  • Based on 54 reviews
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Availability: Only 10 left in stock, order soon!
Fulfilled by Celestron Direct

Arrives Thursday, Mar 5
Order within 20 hours and 28 minutes
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Style: Collapsible 10" Dobsonian


Features

  • LARGE APERTURE: Get a bright, bold viewing experience at a fraction of the cost of other optical designs.
  • INNOVATIVE COLLAPSIBLE DESIGN: Unique strut design allows for optical tube to collapse for ease of portability while keeping collimation.
  • BUILT-IN WIFI: Control your telescope using a smartphone or tablet with Sky-Watchers proprietary built-in wifi signal.
  • ALL METAL GEARING: Using all-metal gearing on a pair of DC servo motors, the SynScan Dobsonian combines the precise automated tracking of a computerized GoTo telescope with the bright large-aperture viewing of a Dobsonian.
  • 94% REFLECTIVE MIRRORS: Fully multi-coated borosilicate primary and secondary mirrors deliver exceptional views.
  • 42,000 OBJECT DATABASE: SynScan hand controller with 42,000 plus object database will keep even the most experienced astronomer busy for countless observing nights.
  • COMES COMPLETE: All accessories such as, 2-inch Crayford-style focuser with 1 1/4-inch adapter, two super wide-angle eyepieces (25mm and 10mm), and 9x50 straight-through finder scope are included with purchase.
  • STURDY AND LIGHTWEIGHT DESIGN: When fully assembled, the Dobsonian weighs only 72 pounds fully assembled (33 pound tube, 39 pound base)
  • Max focal length: 1200

Description

Sky-Watcher’s GoTo Dobsonian epitomizes Sky-Watcher’s dedication to innovative ideas, combining our exclusive collapsible optical tube design with the convenience of a computerized GoTo mount. The SynScan hand controller allows users to point the telescope at specific objects, or tour the night sky with the touch of a button! Most astronomers crave the large aperture of a Dobsonian telescope, yet the lack of computerized GoTo features can be discouraging for some users. Sky-Watcher tackles this by adding motors to a traditional Dobsonian base, giving astronomers the benefits of a computerized GoTo system. Sky-Watcher’s signature SynScan hand controller uses two easy alignment methods, ‘Bright Star Alignment’ or ‘Two-Star Alignment’ for quick and easy setup. Once aligned, the SynScan hand controller can point to over 42,000 objects, including a full catalog of Messier, NGC and IC objects, providing you with a lifetime of celestial observing! While Dobsonian telescopes have a reputation for large apertures at a low cost, they often come at the expense of portability. The GoTo Dobsonian fixes this problem using our exclusive collapsible optical tube, featuring a strut system with three 1” steel poles and chrome locking screws. The strut system uses preset indentations which place the optics in the same position time after time, maintaining collimation. Unlike other Dobsonians using truss-tube systems, Sky-Watcher’s GoTo Dobsonian optical tube does not need to be disassembled before transporting from one location to another. With the ability to collapse up to 36%, these optical tubes can be easily transported in the backseat of most vehicles. At the heart of every Sky-Watcher telescope are professional- grade optics. The GoTo Dobsonian is no exception, using borosilicate mirrors coated in quartz, titanium and silicon dioxide. This yields an amazing 94% reflectivity, vivid contrast and minimal vignetting to deliver an exceptional viewing experience. Unlike other manufacturers, Sky-Watcher has a policy of providing you with all necessary accessories to get started. 8”, 10” and 12” GoTo Dobsonians include a 2” Crayford-style focuser, with a 1.25” adapter and two 1.25” eyepieces (10mm and 25mm). Whether this is your first telescope or not, there’s enough accessories for every kind of astronomer.

Brand: Sky-Watcher


Model Name: Sky-Watcher GoTo Collapsible Dobsonian 10" (254 mm)


Optical Tube Length: 70 Millimeters


Eye Piece Lens Description: Plossl


Telescope Mount Description: Altazimuth Mount


Product Dimensions: 37"D x 19"W x 19"H


Focus Type: Fixed Focus


Power Source: Battery Powered


Finderscope: Reflex


Item Weight: 76.2 Pounds


Product Dimensions: 37 x 19 x 19 inches


Item Weight: 76.2 pounds


Item model number: S11810


Is Discontinued By Manufacturer: No


Date First Available: May 21, 2015


Manufacturer: Sky-Watcher


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Mar 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Just get it... you won't regret it!
Style: Collapsible 8" Dobsonian
I had been thinking of upgrading to this scope for a year before I did it, and I wish I could get that time back and just buy the thing already! NO regrets! Previously I had a 4.5" manual dob; it was a great starter scope. What I love about this one: 1) The tracking! It's great to be able to keep observing without having to manually track an object, especially at higher magnifications. 2) The goto synscan system: setup is amazingly quick and easy (2-4 minutes!). 3) The ability to seamlessly switch between goto and manual moving; yes, you can at any moment just manually move the scope and then go right back to the goto system without resetting! 4) The collapsible tube; the scope can fit in my Prius when collapsed; a cloth light shroud keeps it as dark as if it was non-collapsible (this is NOT included, but is a highly recommended accessory. You can make one yourself or buy one for not too much.) The only thing I did not like was the focuser was in need of adjustment, but that only took me about 5 minutes with an allen wrench and now all's well! ... show more
Reviewed in the United States on April 12, 2018 by G. Spooner

  • What is not to love (first review)
Style: Collapsible 12" Dobsonian
Yes, it is big, yes it is awesome. Now for all you fans, something I did not know. Upon opening the box, the first piece of paper slipped out and indicated , "by the way your Sky-Watcher has built in Wi-Fi." I did not know they had started doing this. I almost bought the Wi-Fi dongle with the scope. I did not have a lot of time with the scope before skies stopped cooperating. I never even used the hand control, just my phone. Fantastic. The pic of the Orion Nebula was just with me trying to line up the phone with the eyepiece, we know that isn't easy, but time was an issue. In any case, the thing kicks butt and has its own Wi-Fi, not networkable, but just connect with phone. I love you Sky-watcher, you're my only scope. Edit. Many folks ask about tracking for astrophotography. Added last pic of Orion with my Pixel with 1:20 minutes exposure. So yes you can do some exposure, but probably not more than 30 sec. Re-edit. Has issues with the drive. Skywatcher support was quick and helpful and sent new base. Very hard to find that type of customer support. Good job! ... show more
Reviewed in the United States on January 15, 2020 by Jason Jason

  • dont waste your time
don't both you can't get all the parts to assemble telescope
Reviewed in the United States on October 28, 2025 by Jeff

  • SAVE ALL PACKING MATERIAL IN CASE YOU NEED TO RETURN IT!!!!!
Style: Collapsible 12" Dobsonian
I am very sorry to leave this rating, as I think it is somewhat unfair, but I can't see doing better just yet. I start by noting that I am a professional astronomer, with years of observing experience with Celestron and Meade scopes, and I even teach laboratory astronomy courses. I'm extremely familiar with the alignment and use of Go-To telescopes. I bought this scope because I wanted a good light-bucket, that could reach further than my 8" catadioptrics. I don't do astrophotography, but a Go-To drive was essential as I've long since gotten star-hopping out of my system. The telescope arrived, and was an easy assembly. Collimation of the secondary and preparation for observing was straightforward. Optical tests showed that it was perfectly consistent with my 2" Ethos eyepieces, with no vignetting, which was really sweet to see. Also, optical tests on bright stars and the moon showed that the image quality of the optics was really great. Then...came the final test...star alignment. Alignment was straightforward on paper, and not to dissimilar to the methods used for Celestron and Meade 8" cats. I opted for two-star alignment, used the hand paddle to move the scope easily from star #1 to star #2. Alignment was declared complete. I tasked the scope to see M27, a fave object, as my "first light" detection. And....nothing. I tasked the scope to go to Vega, and instead I found myself looking at epsilon Lyrae, about 100' off target. So....I realigned, using Altair as star #1 and Capella as star #2....alignment successful, so the paddle declared. I tasked the scope to look at Albireo...again, about 100' off. I tasked it for Capella, which it found, but then it could not refind Altair. I rebooted the scope from a cold start, tried a third time. Same failure. Then, I rebooted the scope, tried "bright star alignment," and got similar bad results. The next clear night, I tried again, after having messaged with customer service at Skywatcher (they got back within 24 hours). I carefully (using a bubble level and compass) made sure my initial configuration of the scope was as required by the manufacturer. I also checked to see if NPE and CE values were set to zero--they were. But still no success in aligning the scope. I wanted to try more tests, but my grace period to return the scope was running out (it's the rainy season in NorCal, and clear nights are rare), so I had to return the scope. I am thankful I fastidiously saved ALL PACKING MATERIAL, bags, etc, so I could avoid a charge from the seller (Adorama). I steeled myself for a battle, as I was afraid Adorama would argue that I somehow damaged the scope, but they did not provide pushback. I intend to repurchase this scope in the summer, when I have more time to check it out. The scope looks really good, and users of the scope on social media tell me that the behavior of the scope I get was abnormal. ... show more
Reviewed in the United States on December 9, 2025 by Barry Allan Rice

  • Great performance for such a simple scope
Style: Collapsible 12" Dobsonian
Awesome scope! We have the 14" version as well but wanted this as it's more portable. Tracks great, GoTo is great, images with ASI camera great.
Reviewed in the United States on April 2, 2025 by Amazon Customer Amazon Customer

  • Great company great telescope
Style: Collapsible 16" Dobsonian
Love the telescope built very well delivered much sooner than expected too
Reviewed in the United States on December 3, 2025 by Steve

  • Great Scope, Great Customer Service
Style: Collapsible 10" Dobsonian
Received my goto Dob and had a problem with the goto base. Tried resetting encoders, factory resets, but could not get it to get close to being accurate. Believing it had a bad encoder, I contacted Kevin at Skywatcher, and after explaining my problem he got a new base out to me quickly. That kind of customer service is rare these days. The telescope is an amazing light bucket, and comes with 2 Plossl eyepieces that are a good start for stargazing. The new goto base works amazingly well after a short two star alignment. All selected objects are nearly centered in the eyepieces after alignment. I have the Skywatcher wifi dongle and use Sky Safari 6 Pro as my goto software. It works great. I would highly recommend the 250p Goto for its cost, portability and light gathering capability. But the customer service is what will bring me back again for more Skywatcher equipment. ... show more
Reviewed in the United States on April 23, 2019 by Kindle Customer

  • Incomplete order
Style: Collapsible 8" Dobsonian
Second order. Second telescope that comes incomplete. Just 1 box missing the other one.
Reviewed in the United States on April 8, 2025 by Alejandro

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