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Skywatcher Dobson N 406/1800 Skyliner FlexTube BD DOB
With a 406mm parabolic mirror, Skywatcher Dobson N 406/1800 Skyliner FlexTube BD DOB provides 1800mm focal length, f/4.4 optics, a collapsible tube, manual wooden Dobsonian base, 2-inch focusing, finder, adapter, and eyepieces.
- 406mm parabolic Newtonian reflector
- 1800mm focal length, f/4.4 optics
- Collapsible FlexTube optical design
- Manual heavy-duty Dobsonian base
- Includes finder, adapter, and eyepieces
In Stock
Description
Featuring a massive 406mm (15.98 in) primary mirror and an 1800mm focal length at f/4.4, the Skywatcher Dobson N 406/1800 Skyliner FlexTube BD DOB 16-inch manual reflector telescope delivers 0.29 arcseconds Dawes resolving power. Built with low-expansion borosilicate glass, it reaches magnitude 15.8 for ultra-deep-sky visual exploration and extreme globular cluster resolution.
The Skywatcher Dobson N 406/1800 Skyliner FlexTube BD DOB features a 16-inch parabolic primary mirror coated with 94% reflective aluminum and a protective silicon dioxide (SiO2) layer. Its three-pole collapsible truss-tube assembly retracts to 1071mm for vehicle transport. Resting on a floor-standing wooden rocker box with heavy-duty Teflon and roller azimuth bearings and tension control knobs, the 38.00 kg (83.78 lbs) OTA ensures silky-smooth manual tracking.
Key Features of Skywatcher Dobson N 406/1800 Skyliner FlexTube BD DOB
Engineered for ultra-deep-sky visual exploration and resolving faint diffuse nebulae, this 16-inch Sky-Watcher Skyliner FlexTube Dobsonian pairs massive light grasp with a collapsible truss frame. Its 2-inch dual-speed Crayford focuser and heavy-duty altitude bearings provide exceptional manual tracking.
- 406mm (15.98 in) aperture with 1800mm focal length and fast f/4.4 optical speed
- Precision parabolic primary mirror made from low-expansion borosilicate optical glass
- 94% reflective aluminum optical coatings with protective silicon dioxide overcoat
- 24.6% secondary mirror obstruction by diameter (100mm minor axis, 6.1% by area)
- Collapsible FlexTube truss system retracting to 1071mm for manageable transport
- 2-inch dual-speed Crayford focuser with 1:10 micro-gear reduction and 1.25-inch adapter
- Floor-standing manual wooden Dobsonian base with heavy-duty Teflon and roller bearings
- High-aperture 9×50 optical finderscope and Super 25mm and 10mm eyepieces included
16-Inch Parabolic Optics & 1:10 Dual-Speed Focuser
The massive 406mm parabolic primary mirror gathers immense light, resolving globular clusters to their core and revealing intricate structures in faint planetary nebulae. Equipped with a 2-inch dual-speed Crayford focuser, this flagship Sky-Watcher Dobsonian supports visual magnifications from 58.0x up to 812x.
Collapsible Truss Frame & Heavy Wooden Rocker Box
Transporting a 16-inch telescope is made feasible by the collapsible FlexTube mechanism, which retracts into a compact form without requiring optical mirror disassembly. Supported by a heavy-duty wooden rocker box with Teflon bearings and tension control knobs, it provides smooth manual nudging and balanced altitude friction under dark skies.
- Collapsible three-pole FlexTube truss system extending rapidly to 1685mm length
- Heavy-duty side altitude bearings with tension control knobs for friction adjustment
- High-aperture 9×50 optical finderscope paired with Super 25mm and 10mm eyepieces
Sky-Watcher Skyliner FlexTube Series Warranty
The Skywatcher Dobson N 406/1800 Skyliner FlexTube BD DOB is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the collapsible 406mm FlexTube OTA, heavy wooden Dobsonian base, 9×50 optical finderscope, 2-inch to 1.25-inch adapter, and Super 25mm and 10mm eyepieces.
Sky-Watcher Dobson N 406/1800 Skyliner FlexTube BD DOB Specs
| Parameter | Specification |
|---|---|
| Brand | Sky-Watcher |
| Full Model Code / SKU / MPN | 10221 (SK-DOB-16-FLEX) |
| Country of Origin | China |
| Series / Product Line | Skyliner FlexTube Black Diamond |
| Optical Design | Newtonian Reflector (Parabolic Primary Mirror, Collapsible Truss-Tube Architecture) |
| Clear Aperture | 406 mm (15.98 in) |
| Focal Length | 1800 mm |
| Focal Ratio | f/4.4 |
| Optical Coatings / Substrate Treatment | Aluminized with Silicon Dioxide (SiO2) Protective Overcoat (94% Reflectivity) |
| Central Obstruction | 24.6% by diameter / 6.1% by area (100 mm secondary mirror minor axis) |
| Glass Substrate / ED Element Spec | Borosilicate Optical Glass (Low Thermal Expansion Parabolic Substrate) |
| Corrected Image Circle / Sensor Coverage | 28 mm (Visual Field) |
| Standard Back Focus / Flange Focal Distance | Not Disclosed by Manufacturer (Standard Visual Configuration) |
| Diffraction-Limited Theoretical Resolving Power | 0.29 arcseconds |
| Limiting Visual Stellar Magnitude | 15.8 mag |
| Highest Useful Magnification | 812x |
| Lowest Practical Magnification | 58.0x |
| Focuser Architecture & Reduction Ratio | 2-inch Dual-Speed Crayford Focuser 1:10 with 1.25-inch Adapter |
| Optical Tube Assembly (OTA) Dry Weight | 38.00 kg (83.78 lbs) |
| OTA Physical Dimensions | 1071 mm collapsed / 1685 mm extended length, 470 mm tube diameter |
| Included Mechanical Mounting Interface | Heavy-Duty Side Altitude Bearings with Tension Control Knobs |
| Mount & Drive Type Included | Floor-Standing Manual Wooden Dobsonian Base with Heavy-Duty Teflon/Roller Azimuth Bearings |
| Verified Factory In-Box Inclusions | Collapsible FlexTube OTA, Heavy Wooden Dobsonian Base, 9x50 Optical Finderscope, 2-inch to 1.25-inch Adapter, Super 25mm and 10mm Eyepieces |
| Factory Warranty Coverage | 2-Year Limited Warranty |
| Primary Optical Application & Astronomical Target Profile | Ultra-Deep-Sky Visual Exploration, Extreme Detail in Globular Clusters, Faint Planetary and Diffuse Nebulae |
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