Skywatcher Dobson N 254/1200 Skyliner FlexTube BD DOB

SKU:

SKYWATCHER-2541200-2

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
$570.00

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SKU: SKYWATCHER-2541200-2 Category: Brand:
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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

ParameterSpecification
BrandSky-Watcher
Full Model Code / SKU / MPN10218 (SK-DOB-10-FLEX)
Country of OriginChina
Series / Product LineSkyliner FlexTube Black Diamond
Optical DesignNewtonian Reflector (Parabolic Primary Mirror, Collapsible Truss-Tube Architecture)
Clear Aperture254 mm (10.00 in)
Focal Length1200 mm
Focal Ratiof/4.7
Optical Coatings / Substrate TreatmentAluminized with Silicon Dioxide (SiO2) Protective Overcoat (94% Reflectivity)
Central Obstruction22.8% by diameter / 5.2% by area (58 mm secondary mirror minor axis)
Glass Substrate / ED Element SpecBorosilicate Optical Glass (Low Thermal Expansion Parabolic Substrate)
Corrected Image Circle / Sensor Coverage28 mm (Visual Field)
Standard Back Focus / Flange Focal DistanceNot Disclosed by Manufacturer (Standard Visual Configuration)
Diffraction-Limited Theoretical Resolving Power0.46 arcseconds
Limiting Visual Stellar Magnitude14.7 mag
Highest Useful Magnification508x
Lowest Practical Magnification36.3x
Focuser Architecture & Reduction Ratio2-inch Dual-Fit Crayford Focuser with 1.25-inch Adapter (Single Speed)
Optical Tube Assembly (OTA) Dry Weight15.00 kg (33.07 lbs)
OTA Physical Dimensions800 mm collapsed / 1120 mm extended length, 288 mm tube diameter
Included Mechanical Mounting InterfaceSide Altitude Bearings with Patented Tension Control Handles
Mount & Drive Type IncludedFloor-Standing Manual Wooden Dobsonian Base with Heavy-Duty Azimuth Bearings
Verified Factory In-Box InclusionsCollapsible 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 Coverage2-Year Limited Warranty
Primary Optical Application & Astronomical Target ProfileDeep-Sky Visual Exploration, Compact Transportable Large Aperture Observation, Faint Galaxy Structures

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