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Sold by: Celestron Direct
Sold by: Celestron Direct
(125 ratings)
92% positive over last 12 months
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Sky-Watcher S11800 GoTo Collapsible Dobsonian 8-Inch (White)

3.5 3.5 out of 5 stars 39 ratings

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Collapsible 8" Dobsonian

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About this item

  • 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-Watcher’s 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+ 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.
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From the manufacturer

flextube synscan

Sky-Watcher's Flextube SynScan Dobsonian

Often referred to as a "light bucket", Sky-Watcher Flextube SynScan Dobsonians add innovative computerized GoTo technology and a collapsible optical tube, giving users the benefits of a large aperture in a portable design. Using Sky-Watcher's signature SynScan technology, users now have access to over 42,000+ objects in the sky, easily accessible with the press of button. If you're new to astronomy and want to experience bright and vivid planetary viewing, this is the scope for you.

synscan flextube skywatcher dobsonian skywatcher dobsonian
Flextube Synscan 200P Flextube Synscan 250P Flextube Synscan 300P
Customer Reviews
3.5 out of 5 stars
39
3.5 out of 5 stars
39
3.5 out of 5 stars
39
Aperture (mm) 203 254 305
F/ratio 5.9 4.7 4.9
Focal Length (mm) 1200 1200 1500
Secondary Diameter (mm) 48 64 70
Dawes Limit 0.57 0.46 0.38
Limiting Magnitude 14 14.5 14.9
Maximum Magnification 400 500 600
OTA Weight (lbs) 24.2 33 46.2
Base Weight (lbs) 33 39 53
Included Eyepieces 10mm & 25mm 10mm & 25mm 10mm & 25mm

skywatcher dobsonian

skywatcher dobsonian

skywatcher dobsonian

skywatcher dobsonian

42,000+ Object Database

Using Sky-Watcher's innovative SynScan hand controller, Flextube SynScan Dobsonians are capable of finding and tracking over 42,000 celestial objects to keep you entertained for countless hours of observing.

Collapsible Optical Tube

All Flextube SynScan Dobsonians feature a unique strut design, allowing the optical tube to collapse for easier transportation and storage. When you're ready to use, simply lift the struts and lock in place.

94% Reflectivity

Using a top of the line parabolic borosilicate mirror with a quartz overcoat, Flextube SynScan Dobsonians produce an incredible 94% reflectivity rating!

Comes Complete with Accessories

All Flextube SynScan Dobsonians come complete with a finderscope, two 1.25-inch eyepieces (10mm and 25mm), and a 2-inch to 1.25-inch adapter.

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This Item
Sky-Watcher S11800 GoTo Collapsible Dobsonian 8-Inch (White)
Sky-Watcher S11800 GoTo Collapsible Dobsonian 8-Inch (White)
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Price-17% $1,199.00
List:$1,450.00
$799.00$639.99-34% $144.99
List:$219.95
$1,599.00-13% $199.95
List:$229.95
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
For beginners
4.7
3.1
3.6
4.5
Easy to use
3.8
5.0
4.7
Portability
4.2
2.9
3.8
Sold By
Adorama
Adorama
Focus Camera LLC
Amazon.com
Amazon.com
Amazon.com
focus type
Manual Focus
Manual Focus
Manual Focus
Manual Focus
eye piece lens
Plossl
Galilean
Barlow
Plossl
Plossl
objective lens diameter
203 millimeters
8 inches
150 millimeters
127 millimeters
203 millimeters
0 millimeters
telescope mount
Altazimuth Mount
Altazimuth Mount
Altazimuth Mount
Equatorial Mount
Altazimuth Mount
lens coating
Fully multi-coated pyrex mirrors
Fully Coated
Fully Multi-Coated
weight
55 pounds
1 pounds
0.01 pounds
21.4 pounds
10.88 kilograms
0.5 pounds
finderscope
Reflex
Reflex
Reflex
Finderscope
Reflex
optical tube length
70 millimeters
39.37 inches
432 millimeters

Looking for specific info?

What's in the box

  • 9x50 Finder, 25/10 Plossl
  • Product information

    Warranty & Support

    Product Warranty: For warranty information about this product, please click here

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    Sky-Watcher

    Sky-Watcher S11800 GoTo Collapsible Dobsonian 8-Inch (White)


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    Product 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.

    Customer reviews

    3.5 out of 5 stars
    3.5 out of 5
    39 global ratings

    Customers say

    Customers like the quality, portability, and ease of use of the telescope. They mention that it's a great scope, with outstanding views. Some appreciate the collapsible tube, making it easy to move. That said, some complain about the mobility. They say that the base makes it difficult to move up and down the stairs, and the Flextube does not return to the exact same position after you collapse it and extend it again.

    AI-generated from the text of customer reviews

    10 customers mention10 positive0 negative

    Customers are satisfied with the quality of the telescope. They mention that it is a high-quality instrument, and the views it provides are outstanding. They also appreciate the resolution and the deep space options it provides. Customers say that they can see moons of Jupiter, Saturn's rings, and other objects in the sky with this telescope.

    "Yes, it is big, yes it is awesome. Now for all you fans, something I did not know...." Read more

    "The scope is amazing. For nearby planets you can see the bands of Jupiter pretty well and make the main ring features of Saturn out pretty well...." Read more

    "...When manually pointing, the views I was getting were outstanding. If the thing simply worked properly, I would have loved it." Read more

    "Great telescope, easy to use. Really delivers that wow factor you're looking for. Wifi included on motorized version...." Read more

    5 customers mention5 positive0 negative

    Customers find the telescope portable. They mention it's smaller and easier to move. Some appreciate the collapsible tube and the fact that it can fit in their Prius when collapsed.

    "Yes, it is big, yes it is awesome. Now for all you fans, something I did not know...." Read more

    "...It works great. I would highly recommend the 250p Goto for its cost, portability and light gathering capability...." Read more

    "...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..." Read more

    "...Also, while this is portable, the bulkiness of the base makes it quite difficult to move up and down the stairs (its about 30 - 35 lbs)...." Read more

    3 customers mention3 positive0 negative

    Customers find the telescope easy to use and setup is amazingly quick and easy.

    "...The goto synscan system: setup is amazingly quick and easy (2-4 minutes!)...." Read more

    "Great telescope, easy to use. Really delivers that wow factor you're looking for. Wifi included on motorized version...." Read more

    "...I'm still learning its easy to use" Read more

    3 customers mention0 positive3 negative

    Customers are dissatisfied with the mobility of the telescope. They mention that it is difficult to move up and down the stairs, and the base of the product is heavy. They also say that the Flextube does not return to the exact same position after it is collapsed and extended.

    "...Nothing would get them moving against except a hard reboot. The other big issue I had was with wi-fi connectivity just dropping constantly...." Read more

    "...The Flextube does not return to the exact same position after you collapse it and extend it again...." Read more

    "...portable, the bulkiness of the base makes it quite difficult to move up and down the stairs (its about 30 - 35 lbs)...." Read more

    What is not to love (first review)
    5 Stars
    What is not to love (first review)
    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!
    Thank you for your feedback
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    Top reviews from the United States

    Reviewed in the United States on January 15, 2020
    Style: Collapsible 12" DobsonianVerified Purchase
    Customer image
    5.0 out of 5 stars What is not to love (first review)
    Reviewed in the United States on January 15, 2020
    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!
    Images in this review
    Customer image Customer image Customer image
    Customer imageCustomer imageCustomer image
    36 people found this helpful
    Report
    Reviewed in the United States on October 5, 2023
    Style: Collapsible 12" DobsonianVerified Purchase
    3 people found this helpful
    Report
    Reviewed in the United States on April 23, 2019
    Style: Collapsible 10" DobsonianVerified Purchase
    13 people found this helpful
    Report
    Reviewed in the United States on September 9, 2020
    Style: Collapsible 8" DobsonianVerified Purchase
    19 people found this helpful
    Report
    Reviewed in the United States on July 29, 2023
    Style: Collapsible 10" DobsonianVerified Purchase
    5 people found this helpful
    Report
    Reviewed in the United States on April 12, 2018
    Style: Collapsible 8" DobsonianVerified Purchase
    65 people found this helpful
    Report
    Reviewed in the United States on November 20, 2021
    Style: Collapsible 12" DobsonianVerified Purchase
    3 people found this helpful
    Report
    Reviewed in the United States on September 24, 2019
    Style: Collapsible 10" DobsonianVerified Purchase
    Customer image
    5.0 out of 5 stars 10" of night time fun!
    Reviewed in the United States on September 24, 2019
    Great telescope, easy to use. Really delivers that wow factor you're looking for. Wifi included on motorized version. One guy on here mentioned having to collimate every time, but in my experience if I'm gentle moving the scope outside and setting it up, then the collimation holds fine from the last time I observed. Maybe he just needs to lock down the screws a little tighter after adjusting his mirrors. Can't wait to buy some nice Televue/Explore Scientific eyepieces (update: bought a Explore Scientific 120° 9mm, omg this eyepiece is awesome, worth every penny!) to really see the full potential of this scope. Highly recommend for anyone (beginner or pro) interested in astronomy. My pics were taken with just a cell phone, but a nice DSLR camera is on the horizon. Buy this scope, you won't be disappointed!
    Images in this review
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    26 people found this helpful
    Report

    Top reviews from other countries

    Takhell
    4.0 out of 5 stars Excellent so far - minus 1 star for type of 12v adapter provided
    Reviewed in Canada on September 29, 2020
    Style: Collapsible 10" DobsonianVerified Purchase
    4 people found this helpful
    Report