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Orion CT10l 250/1575 Carbon Newtonian OTA Specs
| Brand | Orion (Orion Optics UK) |
| Full Model Code | Orion Optics UK CT10L 250/1575 Long Focal Precision Carbon Newtonian Optical Tube Assembly |
| Country of Origin | United Kingdom (Designed and Manufactured) |
| Optical Design | Newtonian Reflector (Parabolic Primary Mirror Layout with Planar Secondary Mirror) |
| Aperture | 250 mm (9.84 inches) |
| Focal Length | 1575 mm |
| Focal Ratio | f/6.3 |
| Optical Coatings | Hilux Multi-Layer Reflective Coating Matrix Delivering 97% Total Reflectivity Levels |
| Glass Material | Premium Precision-Annealed Suprax Glass Substrate with Ultra-Low Expansion Index |
| Secondary Mirror Obstruction | 50 mm |
| Secondary Mirror Obstruction by Diameter | 20.00% |
| Secondary Mirror Obstruction by Area | 4.00% |
| Resolving Power | 0.46 Arcseconds (Dawes), 0.55 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 13.8 |
| Highest Useful Magnification | 500x |
| Lowest Useful Magnification | 36x |
| Optical Tube Material | Genuine Multi-Layer Twill Carbon Fiber Structural Shell with Matte Internal Anti-Reflective Coating |
| Focuser Style & Mechanism | 2-inch Dual-Speed Octoplus Crayford Focuser with 10:1 Planetary Precision Micro-Gear Reduction |
| Mirror Lock Mechanism | Yes (Equipped with CNC-Machined 9-Point Cells featuring Micro-Adjusting Collimation Bolts) |
| Optical Tube Dimensions | 280 mm x 1510 mm |
| Optical Tube Weight | 13.00 kg (28.66 lbs) |
| Mount Attachment Type | CNC-Machined Aluminum Support Ring Set Fastened to Heavy Losmandy-Style Dovetail Bar |
| Finder Scope Specification | Not Included / Pre-drilled for Standard Finder Bracket Base Plates |
| Included Accessories | 254mm Suprax Newtonian OTA, CNC Tube Rings, Heavy Losmandy-Style Mounting Rail, 2-inch Octoplus Focuser, 1/10 PV Wavefront Surface Test Report |
| Standard Warranty | 1-Year Limited Warranty |
| Application | High-definition lunar and planetary surface analysis loops, utilizing an ultra-small 20% central linear obstruction to squeeze maximum contrast and definition from target zones. |
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