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Orion CT8 200/900 Carbon Newtonian OTA Specs
| Brand | Orion (Orion Optics UK) |
| Full Model Code | Orion Optics UK CT8 200/900 Precision Carbon Fiber Newtonian Reflector Optical Tube Assembly |
| Country of Origin | United Kingdom (Designed and Manufactured) |
| Optical Design | Newtonian Reflector (Parabolic Primary Mirror Layout with Planar Secondary Mirror) |
| Aperture | 200 mm (7.87 inches) |
| Focal Length | 900 mm |
| Focal Ratio | f/4.5 |
| 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 | 25.00% |
| Secondary Mirror Obstruction by Area | 6.25% |
| Resolving Power | 0.58 Arcseconds (Dawes), 0.69 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 13.3 |
| Highest Useful Magnification | 400x |
| Lowest Useful Magnification | 29x |
| 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 | 230 mm x 840 mm |
| Optical Tube Weight | 7.00 kg (15.43 lbs) |
| Mount Attachment Type | CNC-Machined Aluminum Support Ring Set Fastened to Heavy Vixen or Losmandy-Style Dovetail Bar |
| Finder Scope Specification | Not Included / Pre-drilled for Standard Finder Bracket Base Plates |
| Included Accessories | 200mm Suprax Ultra-Precision Newtonian OTA, CNC Tube Rings, Dovetail Rail, 2-inch Octoplus Focuser, 1/10 PV Zygo Interferometer Wavefront Verification Report |
| Standard Warranty | 1-Year Limited Warranty |
| Application | Elite high-contrast planetary screening loops and deep-sky imaging, deploying a certified 1/10 PV wavefront mirror matrix to eliminate wavefront scatter tracks. |
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