Eyepiece fitting
The 2-inch focuser accepts 2-inch eyepieces, or 1.25-inch eyepieces with the adaptor.
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TSA
Sky-Watcher Dobsonian 16 Inch Collapsible Telescope
$5,249.00
406 mm optics on a manual Dobsonian base.
The Sky-Watcher FlexTube 400P is a Newtonian telescope for visual astronomy. Its aperture suits lunar detail, planets, star clusters and deep-sky observing; darker skies make faint targets easier to see.
406 mmaperture
Collect light for visual observing
The parabolic primary mirror forms the image you view through an eyepiece. Sky conditions still set the detail you can resolve.
1800 mmfocal length
Choose magnification with the eyepiece
Magnification is telescope focal length divided by eyepiece focal length. Start at low power to find and centre a target, then increase it when the air is steady.
Manualmount
Point and follow by hand
Move the telescope up, down and around to find your target, then make small adjustments as it drifts through the field.
Collapse the tube for storage
Extend and lock the tube for observing, then retract it for storage. The collapsing structure reduces tube length; allow room for the base as well when planning storage or transport.
Using the FlexTube 400P
Visual observing
Use lower power for larger star fields and higher power for lunar or planetary detail when conditions allow.
Observing conditions
Let the optics approach the outdoor temperature. Steady air and a dark observing location help you make the most of the aperture.
Good to know
Allow room for the base
A Dobsonian base still needs floor and vehicle space. Plan where the tube and base will be stored and how you will carry them to your observing spot.
Prepare the optics
Allow cooling time before judging fine detail. Check reflector collimation, particularly after transport or assembly.
Keep the Sun out of the telescope
Never point the telescope or finder at the Sun. Unfiltered sunlight can cause permanent eye damage.
In the box
Optical tube and Dobsonian base
Two 1.25 inch eyepieces
Finder scope
2 inch to 1.25 inch adaptor
2 inch extension tube
User manual
Five-year Australian warranty
Sky-Watcher covers defects in materials and workmanship for five years from purchase. The warranty is non-transferable and requires proof of purchase in Australia or New Zealand.
Damage caused by misuse, improper handling or installation, or unauthorised servicing is excluded. Follow the model instructions for routine alignment and maintenance, and consult the full warranty terms for exclusions.
Australian warranty terms and claim formSpecifications
Optics
Aperture
406 mm
Optical design
Newtonian reflector with parabolic primary mirror
Focal length
1800 mm
Focal ratio
f/4.4
Mount and fittings
Mount and control
Manual alt-azimuth
Eyepiece fitting
2 inch with 1.25 inch adaptor
Telescope tube length
1071mm-1685mm
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406 mm optics on a manual Dobsonian base.
The Sky-Watcher FlexTube 400P is a Newtonian telescope for visual astronomy. Its aperture suits lunar detail, planets, star clusters and deep-sky observing; darker skies make faint targets easier to see.
406 mmaperture
Collect light for visual observing
The parabolic primary mirror forms the image you view through an eyepiece. Sky conditions still set the detail you can resolve.
1800 mmfocal length
Choose magnification with the eyepiece
Magnification is telescope focal length divided by eyepiece focal length. Start at low power to find and centre a target, then increase it when the air is steady.
Manualmount
Point and follow by hand
Move the telescope up, down and around to find your target, then make small adjustments as it drifts through the field.
Collapse the tube for storage
Extend and lock the tube for observing, then retract it for storage. The collapsing structure reduces tube length; allow room for the base as well when planning storage or transport.
Using the FlexTube 400P
Eyepiece fitting
The 2-inch focuser accepts 2-inch eyepieces, or 1.25-inch eyepieces with the adaptor.
Visual observing
Use lower power for larger star fields and higher power for lunar or planetary detail when conditions allow.
Observing conditions
Let the optics approach the outdoor temperature. Steady air and a dark observing location help you make the most of the aperture.
Good to know
Allow room for the base
A Dobsonian base still needs floor and vehicle space. Plan where the tube and base will be stored and how you will carry them to your observing spot.
Prepare the optics
Allow cooling time before judging fine detail. Check reflector collimation, particularly after transport or assembly.
Keep the Sun out of the telescope
Never point the telescope or finder at the Sun. Unfiltered sunlight can cause permanent eye damage.
In the box
Optical tube and Dobsonian base
Two 1.25 inch eyepieces
Finder scope
2 inch to 1.25 inch adaptor
2 inch extension tube
User manual
Five-year Australian warranty
Sky-Watcher covers defects in materials and workmanship for five years from purchase. The warranty is non-transferable and requires proof of purchase in Australia or New Zealand.
Damage caused by misuse, improper handling or installation, or unauthorised servicing is excluded. Follow the model instructions for routine alignment and maintenance, and consult the full warranty terms for exclusions.
Australian warranty terms and claim formSpecifications
Optics
Aperture
406 mm
Optical design
Newtonian reflector with parabolic primary mirror
Focal length
1800 mm
Focal ratio
f/4.4
Mount and fittings
Mount and control
Manual alt-azimuth
Eyepiece fitting
2 inch with 1.25 inch adaptor
Telescope tube length
1071mm-1685mm
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