Skywatcher Dobson N 254/1200 Skyliner FlexTube BD DOB
Transportable large-aperture viewing defines Skywatcher Dobson N 254/1200 Skyliner FlexTube BD DOB, using a 254mm parabolic mirror, 1200mm focal length, f/4.7 optics, collapsible truss-tube construction, manual Dobsonian base, finder, adapter, and eyepieces.
- 254mm parabolic Newtonian reflector
- 1200mm focal length, f/4.7 optics
- Collapsible FlexTube optical design
- Manual wooden Dobsonian base
- Includes finder, adapter, and eyepieces
In Stock
Description
Observe faint galaxy structures and resolve dense globular clusters with the Skywatcher Dobson N 254/1200 Skyliner FlexTube BD DOB manual parabolic reflector telescope. Designed with an f/4.7 focal ratio, this 254mm (10.00 in) aperture telescope features a 1200mm focal length, delivering 0.46 arcseconds Dawes resolving power and reaching magnitude 14.7 for deep-sky visual exploration.
The Skywatcher Dobson N 254/1200 Skyliner FlexTube BD DOB utilizes a parabolic primary mirror crafted from low-expansion borosilicate glass, coated with 94% reflective aluminum and a protective silicon dioxide (SiO2) layer. Its collapsible truss-tube assembly retracts to 800mm for convenient vehicle transport. Resting on a floor-standing wooden rocker box with heavy-duty azimuth bearings and patented altitude tension control handles, the 15.00 kg (33.07 lbs) OTA ensures silky-smooth manual tracking.
Key Features of Skywatcher Dobson N 254/1200 Skyliner FlexTube BD DOB
Engineered for transportable large-aperture deep-sky visual astronomy, this 10-inch Sky-Watcher Skyliner FlexTube Dobsonian pairs a fast parabolic mirror with an innovative collapsible truss tube. Its 2-inch dual-fit Crayford focuser and tension control handles deliver high-contrast views of faint galactic structures.
- 254mm (10.00 in) aperture with 1200mm focal length and fast f/4.7 optical speed
- Precision parabolic primary mirror made from low-expansion borosilicate optical glass
- 94% reflective aluminum optical coatings with protective silicon dioxide overcoat
- Small 22.8% secondary obstruction by diameter (58mm minor axis, 5.2% by area)
- Collapsible FlexTube truss system retracting to 800mm for easy vehicle transport
- 2-inch dual-fit Crayford focuser with step-down 1.25-inch reduction adapter
- Floor-standing manual wooden Dobsonian base with patented tension control handles
- High-aperture 9×50 optical finderscope and Super 25mm and 10mm eyepieces included
10-Inch Parabolic Optics & Collapsible FlexTube Frame
The 254mm parabolic primary mirror focuses light rays accurately without spherical aberration, revealing subtle details in planetary nebulae and galaxies. Its rigid three-pole collapsible truss design locks securely into place without requiring re-collimation, supporting magnifications from 36.3x up to 508x.
Floor-Standing Rocker Box & Tension Control Handles
Smooth manual nudging is critical when tracking deep-space objects at high magnification. The Skyliner 250P FlexTube features a floor-standing wooden rocker box with heavy-duty azimuth bearings for fluid horizontal rotation. Its patented side tension control handles allow observers to adjust altitude friction, preventing optical tube sag when using heavy eyepieces.
- Floor-standing wooden Dobsonian base with smooth altitude and azimuth bearing tracks
- Patented side tension control handles for customized altitude friction adjustment
- Included 9×50 optical finderscope paired with Super 25mm and 10mm eyepieces
Sky-Watcher Skyliner FlexTube Series Warranty
The Skywatcher Dobson N 254/1200 Skyliner FlexTube BD DOB is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the collapsible 254mm FlexTube OTA, wooden Dobsonian base with tension control, 9×50 finderscope, 2-inch to 1.25-inch adapter, and Super 25mm and 10mm eyepieces.
Sky-Watcher Dobson N 254/1200 Skyliner FlexTube BD DOB Specs
| Parameter | Specification |
|---|---|
| Brand | Sky-Watcher |
| Full Model Code / SKU / MPN | 10218 (SK-DOB-10-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 | 254 mm (10.00 in) |
| Focal Length | 1200 mm |
| Focal Ratio | f/4.7 |
| Optical Coatings / Substrate Treatment | Aluminized with Silicon Dioxide (SiO2) Protective Overcoat (94% Reflectivity) |
| Central Obstruction | 22.8% by diameter / 5.2% by area (58 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 | 0.46 arcseconds |
| Limiting Visual Stellar Magnitude | 14.7 mag |
| Highest Useful Magnification | 508x |
| Lowest Practical Magnification | 36.3x |
| Focuser Architecture & Reduction Ratio | 2-inch Dual-Fit Crayford Focuser with 1.25-inch Adapter (Single Speed) |
| Optical Tube Assembly (OTA) Dry Weight | 15.00 kg (33.07 lbs) |
| OTA Physical Dimensions | 800 mm collapsed / 1120 mm extended length, 288 mm tube diameter |
| Included Mechanical Mounting Interface | Side Altitude Bearings with Patented Tension Control Handles |
| Mount & Drive Type Included | Floor-Standing Manual Wooden Dobsonian Base with Heavy-Duty Azimuth Bearings |
| Verified Factory In-Box Inclusions | Collapsible FlexTube OTA, Wooden Dobsonian Base with Tension Control, 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 | Deep-Sky Visual Exploration, Compact Transportable Large Aperture Observation, Faint Galaxy Structures |


























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