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Skywatcher Dobson N 305/1500 Skyliner FlexTube BD DOB
Deep-sky aperture increases with Skywatcher Dobson N 305/1500 Skyliner FlexTube BD DOB, combining a 305mm parabolic mirror, 1500mm focal length, f/4.9 optics, collapsible construction, manual wooden mounting, finder, adapter, and eyepieces.
- 305mm parabolic Newtonian reflector
- 1500mm focal length, f/4.9 optics
- Collapsible FlexTube optical design
- Manual heavy-duty Dobsonian base
- Includes finder, adapter, and eyepieces
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Description
Explore distant galaxy clusters and resolve intricate nebulae filaments with the Skywatcher Dobson N 305/1500 Skyliner FlexTube BD DOB 12-inch parabolic reflector telescope system. Designed with an f/4.9 focal ratio, this 305mm (12.01 in) aperture telescope features a 1500mm focal length, attaining 0.38 arcseconds Dawes resolving power and reaching magnitude 15.1 for deep-sky visual astronomy.
The Skywatcher Dobson N 305/1500 Skyliner FlexTube BD DOB utilizes a parabolic primary mirror crafted from low-expansion borosilicate optical glass with 94% reflective aluminum and silicon dioxide (SiO2) coatings. Its collapsible truss structure retracts to 920mm for vehicle transport. Supported by a floor-standing wooden rocker box with heavy-duty azimuth bearings and patented tension control handles, the 21.00 kg (46.30 lbs) OTA delivers smooth, vibration-damped manual tracking across faint celestial coordinates.
Key Features of Skywatcher Dobson N 305/1500 Skyliner FlexTube BD DOB
Built for deep-sky galaxy clusters, faint nebulae, and resolving globular clusters to their cores, this 12-inch Sky-Watcher Skyliner FlexTube Dobsonian pairs massive light grasp with a collapsible truss frame. Its 2-inch dual-speed Crayford focuser ensures ultra-fine optical focusing.
- 305mm (12.01 in) aperture with 1500mm focal length and fast f/4.9 optical speed
- Precision parabolic primary mirror made from low-expansion borosilicate optical glass
- 94% reflective aluminum optical coatings with protective silicon dioxide overcoat
- 23% secondary mirror obstruction by diameter (70mm minor axis, 5.3% by area)
- Collapsible FlexTube truss system retracting to 920mm 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 patented tension control handles
- High-aperture 9×50 optical finderscope and Super 25mm and 10mm eyepieces included
12-Inch Parabolic Optics & 1:10 Dual-Speed Focuser
The massive 305mm parabolic primary mirror gathers abundant light to resolve individual stars in dense globular cores. Equipped with a 2-inch dual-speed Crayford focuser featuring 1:10 micro-reduction, this Sky-Watcher Dobsonian supports visual magnifications from 43.6x up to 610x.
Collapsible Truss Frame & Tension Control Handles
Handling a 12-inch optical tube is made simple by the collapsible FlexTube mechanism, which retracts into a compact form without requiring optical mirror disassembly. Supported by a wooden rocker box with Teflon bearings and patented tension control handles, it provides smooth manual nudging and customizable altitude friction control under dark skies.
- Collapsible three-pole FlexTube truss system extending rapidly to 1400mm length
- Patented side tension control handles for customized altitude balance adjustments
- High-aperture 9×50 optical finderscope paired with Super 25mm and 10mm eyepieces
Sky-Watcher Skyliner FlexTube Series Warranty
The Skywatcher Dobson N 305/1500 Skyliner FlexTube BD DOB is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the collapsible 305mm 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 305/1500 Skyliner FlexTube BD DOB Specs
| Parameter | Specification |
|---|---|
| Brand | Sky-Watcher |
| Full Model Code / SKU / MPN | 10219 (SK-DOB-12-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 | 305 mm (12.01 in) |
| Focal Length | 1500 mm |
| Focal Ratio | f/4.9 |
| Optical Coatings / Substrate Treatment | Aluminized with Silicon Dioxide (SiO2) Protective Overcoat (94% Reflectivity) |
| Central Obstruction | 23% by diameter / 5.3% by area (70 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 | 0.38 arcseconds |
| Limiting Visual Stellar Magnitude | 15.1 mag |
| Highest Useful Magnification | 610x |
| Lowest Practical Magnification | 43.6x |
| Focuser Architecture & Reduction Ratio | 2-inch Dual-Speed Crayford Focuser 1:10 with 1.25-inch Adapter |
| Optical Tube Assembly (OTA) Dry Weight | 21.00 kg (46.30 lbs) |
| OTA Physical Dimensions | 920 mm collapsed / 1400 mm extended length, 360 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 Galaxy Clusters and Faint Nebulae Detail Visual Observation, Resolving Globular Clusters to Core |
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