Sky-Watcher 10" Flextube SynScan GoTo Collapsible Dobsonian — image 1
Sky-Watcher

Sky-Watcher 10" Flextube SynScan GoTo Collapsible Dobsonian

Ten inches of light-grasp that finds and tracks for you, in a truss tube that still drops into a hatchback, the sweet-spot GoTo Dob for most deep-sky observers.

85/ 100
Polaris Score
#1 of 1 10" GoTo Dobsonian
See the breakdown ↓
Aperture
254mm
Focal Length
1200mm
Focal Ratio
f/4.7
Mount Type
Dobsonian (GoTo)
Optical Design
Dobsonian
Weight
32.7 kg
From$1,649

Lowest in 90 days

Price tracked by PolarisObserved 54 timesTracking since Aug 2026

Try in simulator →
What it's built forOpen these in the simulator →

This telescope was built to gather light.

254 mm of aperture pulls in the faint light that galaxies and clusters live or die on. Point it up under a dark sky and objects that are rumors in smaller scopes resolve into real structure.

Sweet spot 190–320×Rewards dark skies
The view people remember

The Sombrero, brim and all.

A bright edge-on galaxy crossed by a sharp dark dust lane — the brim of the hat — one of the most distinctive shapes in the entire deep sky.

See The Sombrero Galaxy through this telescope →
01What it's good at

What it's best at — and the trade-offs.

254mm gathers ~55% more light than an 8-inch, enough to turn faint galaxy smudges into shapes with structure
Best at
✓254mm gathers ~55% more light than an 8-inch, enough to turn faint galaxy smudges into shapes with structure
✓SynScan GoTo motorizes both axes: align on a few stars and it slews to and tracks any of 42,000+ objects, so a big Dob stops being a hunt and starts being a tour
✓The Flextube truss collapses the tube for transport, then extends and holds collimation, the only way a scope this size fits in a normal car
✓It keeps the Dobsonian payoff intact: aperture-per-dollar nothing else touches, on a stable, intuitive alt-az base
Trade-offs
!It's heavy and bulky: plan on a two-part carry and, at the larger sizes, help or a wheeled setup
!The GoTo base needs stable power (a battery pack or supply) that a manual Dob does not
!The open truss lets stray light and dust reach the mirror, so a shroud helps at real sites
!At f/4.7 it's demanding on eyepieces and shows edge coma without a corrector; alt-az tracking suits visual use, not imaging
02In plain English

What These Numbers Mean

254mm · f/4.7 · 1200mm FL · Dobsonian (GoTo)
Aperture
254 mm (10 inch)
Ten inches gathers roughly 1,300 times the light of your eye, which is enough to make faint galaxies genuinely rewarding rather than merely detectable. With GoTo attached, working through a list of a dozen of them in a night becomes realistic.
Focal length
1200 mm
Reaches 240x with a 5 mm eyepiece for planetary work and 40x with a 30 mm for wide sweeps. Long enough for detail, short enough to stay versatile.
Focal ratio
f/4.7
Fast, so wide, low-power fields come easily, but eyepiece quality and collimation both matter. A coma corrector is a real improvement rather than a refinement at this ratio.
Optical design
Collapsible truss Newtonian
The truss collapses for transport, halving the storage length of a 10 inch tube. The trade is a collimation check after every setup and a shroud to keep stray light and dew off the mirror.
Weight
36 kg total
About 79 lb once the motorised base is included, which is significantly heavier than the manual version. Two carries minimum, and the base alone is a solid lift.
Mount
SynScan GoTo Dobsonian base
Motors on both axes plus a 42,000 object database mean it slews to targets and tracks them, so faint objects stay centred while you study them. Alt-azimuth tracking is excellent visually but does not support long-exposure imaging.
03The Polaris Score

How it scores, and why.

85/100 · #1 of 1 10" GoTo Dobsonian
85/ 100
Sky-Watcher 10" Flextube SynScan GoTo Collapsible Dobsonian
#1 of 1 10" GoTo Dobsonian
Performance
85
Ease of use
85
Portability
60
Upgrade potential
60

Polaris weighs optical capability, how easy the scope is to live with, how portable it is, and how far it takes you before you outgrow it — not list price or brand.

04Who it's for

An honest fit check.

Deep-sky observers who want 10" of light-grasp and let the mount find and track objects for…
Buy it if you
✓Deep-sky observers who want 10" of light-grasp and let the mount find and track objects for them
✓Anyone chasing faint galaxies, globulars, and planetary nebulae that smaller scopes only hint at
✓Observers with the space and a way to move a large two-part scope who want maximum aperture without a permanent pier
Look elsewhere if you
!Anyone who needs a light, one-hand grab-and-go setup, this is a deliberate haul
!Deep-sky imagers, since an alt-az Dob base can't do long exposures
!Observers short on storage or without a way to transport a bulky base and tube
05Build your rig

What to buy next — and where it leads.

8 pieces of gear, ordered by what changes the view most
Recommended upgrades
See wider, brighter deep-sky views★ Top pickExplore Scientific 68deg 28mm 2-inch

Commonly paired with Sky-Watcher 10" Flextube SynScan GoTo Collapsible Dobsonian

Pinpoint stars across the whole fieldApertura 1x Photographic Coma Corrector

Sharpens stars to the very edge of the field at fast focal ratios

Make nebulae popOptolong UHC Filter 2″

Improves contrast on nebulae and planets with this setup

Observe better
Tame lunar glareGSO Moon Filter 13pct 1.25-inch

Improves contrast on nebulae and planets with this setup

Make nebulae popSVBony UHC 1.25-inch

Commonly paired with this telescope

Sharper planets & lunar detailCelestron X-Cel LX 7mm

Commonly paired with this telescope

A sharper everyday viewCelestron X-Cel LX 18mm

Commonly paired with this telescope

Show all compatible gear (5) →
Accessories
Double your magnificationTele Vue 2x Barlow 1.25-inch

Doubles magnification for closer planetary detail with this telescope

Lunar & planetary
Excellent
Deep-sky visual
Excellent
Astrophotography
Not its purpose, a visual scope
06The numbers

Full specifications.

6 measured and stated values
Optics
Optical DesignDobsonian
Aperture254mm
Focal Length1200mm
Focal Ratiof/4.7
Mount & drive
Mount TypeDobsonian (GoTo)
Physical
Weight32.7 kg
07Alternatives

For a different goal, start here.

3 alternatives, each mapped to the goal it wins at
Smaller & lighter

Sky-Watcher Flextube 200P SynScan GoTo Collapsible Dobsonian

The 8-inch GoTo version if you want an easier one-person carry for less money

→
More aperture

Sky-Watcher Flextube 300P SynScan GoTo Collapsible Dobsonian

The 12-inch reaches noticeably deeper if you can handle the extra bulk and weight

→
Manual & cheaper

Sky-Watcher Flextube 250P Collapsible Dobsonian

The same 10-inch aperture without motors if you'd rather star-hop and save

→
Also worth comparing
Celestron C9.25 Schmidt-Cassegrain OTA
Celestron
Celestron C9.25 Schmidt-Cassegrain OTA
Closest alternative at this size
Orion SkyQuest XT12 Dobsonian
Orion
Orion SkyQuest XT12 Dobsonian
More capability for deeper views
Celestron EdgeHD 8
Celestron
Celestron EdgeHD 8
Smaller and easier to handle