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Skywatcher Dobson N 305/1500 Skyliner FlexTube BD DOB Specs
| Brand | Sky-Watcher |
| Full Model Code | Sky-Watcher Skyliner-300P FlexTube Black Diamond Manual Collapsible Dobsonian Telescope |
| Country of Origin | China (Manufactured) |
| Optical Design | Newtonian Reflector (Parabolic Primary Mirror Layout with Planar Secondary Mirror) |
| Aperture | 305 mm (12.01 inches) |
| Focal Length | 1500 mm |
| Focal Ratio | f/4.92 |
| Optical Coatings | Aluminized Mirror Coating Surface Matrix with Protective Silicon Dioxide Overcoat Shield |
| Glass Material | Standard Borosilicate Glass Substrate with stable thermal response parameters |
| Secondary Mirror Obstruction | 70 mm |
| Secondary Mirror Obstruction by Diameter | 22.95% |
| Secondary Mirror Obstruction by Area | 5.27% |
| Resolving Power | 0.38 Arcseconds (Dawes), 0.45 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 14.5 |
| Highest Useful Magnification | 610x |
| Lowest Useful Magnification | 43x |
| Optical Tube Material | Patented Collapsible Truss FlexTube Multi-Rod Slideway Frame with Sheet Steel Lower Core |
| Focuser Style & Mechanism | 2-inch Crayford Focuser with built-in adjustable tension knobs and 1.25-inch adaptor sleeve |
| Mirror Lock Mechanism | No (Equipped with standard manual spring-tensioned cell adjustment bolts) |
| Optical Tube Dimensions | 340 mm x 920 mm (Truss collapsed layout) / 340 mm x 1440 mm (Extended configuration) |
| Optical Tube Weight | 21.00 kg (46.30 lbs) (OTA Only) / 39.50 kg (87.08 lbs) (Complete Mount Setup Weight) |
| Mount Attachment Type | Heavy-Duty Side Pivot Plates secured into a Manual Alt-Azimuth Wood Rocker Box Plate |
| Finder Scope Specification | 9x50 Optical Straight-Through Finder Scope Kit Complete with O-Ring Alignment Bracket |
| Included Accessories | 305mm Collapsible Newtonian OTA, Wooden Rocker Box Floor Base, Side Tension Grips, 9x50 Finder, 25mm Eyepiece, 10mm Eyepiece |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Deep-space structure analysis loops, employing a large 12-inch aperture surface to isolate light filaments within dim planetary nebulae from a packable field platform. |
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