Sky-Watcher Skyliner-400P FlexTube SynScan GoTo: The 16-inch Observatory with Autopilot
This configuration pairs the 406 mm mirror (f/4.4) with SynScan GoTo: automatically locate and track 42,900 objects, with dual encoders for manual movement at any time. With a mirror that captures over two and a half times more light than a 10-inch, this isn't a gadget: the computer unlocks the faint objects for which this aperture is made.
What can you see through the 400P GoTo?
Dark matter tracks in Andromeda, filaments in Orion, subtle structure in globular clusters, and planetary detail that, on clear nights, borders on the visually impossible. With automatic tracking, any target remains steady at high magnification, ideal for long sessions and for guiding guests.
Ready for short recordings
The 2-inch focuser with T2 mount allows you to directly connect a camera for short lunar and planetary shots. For visual work, the included adapters accept any standard eyepiece.
This is how to get the most out of this telescope
- To them, in part: Disassemble the equatorial mount and motorized rocker box separately, preferably with two people. Plan the route to your observing location on it.
- Close the open section: A light shroud around the extended truss keeps stray light and dew out. The standard upgrade for FlexTube models.
- Allow for at least an hour to cool down For the large mirror, especially in winter.
- Collimation at f/4.4 is a fixed ritual on transport; our guide to collimation It takes two minutes.
- Use a power tank: The GoTo motors run on 12V and cold nights drain battery capacity. An external battery will keep it going all night.
For whom yes and for whom no
Hello The observer who wants the ultimate visual instrument and has the logistics in order: fixed location, help with lifting, power supply arranged.
Not When in doubt about size, any smaller Skyliner is the wiser choice. Long exposures belong with the smart telescopes; Short camera recordings via T2 are a strong side effect here.
Featured accessories
These accessories add the most after purchase:
- Moon Filter 13%: With this mirror size, the moon is blindingly bright. The Omegon Moon Filter 13% (1.25 inches) dims the light and increases the contrast. More explanation is in our Moon filter guide.
- Cheshire eyepiece the Sky-Watcher Cheshire Eyepiece Aligning the mirrors is more accurate than the included tools. With these fast opening ratios, it's not a luxury but a essential piece.
Technical specifications
| Feature | Value |
|---|---|
| Type | Reflector |
| Design | Newton |
| Aperture (mm) | 406 |
| Focal length (mm) | 1800 |
| Aperture ratio (f/) | 4,4 |
| Resolution | 0,28″ |
| Limit value (mag) | 14,8 |
| Light output | 3360× |
| Max. useful magnification | 812× |
| Tube weight (kg) | 38 |
| Construction | Open tube |
| Mirror | Parabolic |
Included in the box
- Sky-Watcher Skyliner-400P FlexTube Optical Tube with Motorized GoTo Rocker Box
- Eyepieces: 25 mm & 10 mm
- Searcher: 9x50
- Adapters: 2" / 1.25"
- SynScan GoTo Control
Honest advice from observers
We sell and use the Sky-Watcher line ourselves. In our Sky-Watcher merk Guide We'll explain which series are strong and which you'd rather skip. View the full range on our Sky-Watcher merk Page or compare all models in our Dobson assortment. If ordered before 11:59 PM, it will be delivered quickly, in the Netherlands and Belgium. Not sure about the size or version? Call or email us: these are purchases we're happy to help you think through.
Manufacturer's additional specifications
- Manufacturer Model Name: StarGate-400P SynScan FlexTube
- Focal length: 1650 mm (f/4.1)
- Mirror material: Low-Expansion Borosilicate Glass (primary and secondary)
- Mirror coating: RAQ (Radiant Aluminum Quartz), 94% reflectance
- Primary mirror with patented weight-saving design
- Mirror length: 120 mm
- Included eyepieces: 12.5 mm and 20 mm, 70-degree wide-angle (1.25 inch)
- Collimation eyepiece (1.25 inch) included
- 2 inch dual-speed Crayford focuser with 1.25 inch and 2 inch adapters
- Universal smartphone adapter (for devices 54 to 90 mm wide)
- Light shroud included
- Tube length extended: 1500 mm, retracted: 850 mm
- Drive: worm and timing belt, 256 microsteps/1.8 degree stepper motor
- Accuracy: 5 arcminutes (RMS)
- Transmission: azimuth 854.182 / altitude 1655.636
- Connections: USB-B, remote control, power supply
- Power supply: DC 11V/5A to 15V/3A
- Total weight: 50 kg
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