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Officina Stellare RC 500/4000 Pro RC CGA Ritchey-Chretien OTA Specs
| Brand | Officina Stellare |
| Full Model Code | Officina Stellare ProRC 500 Low Expansion Glass Core Carbon Truss Astrophotography Optical Tube Assembly - CGA Edition |
| Country of Origin | Italy |
| Optical Design | True Ritchey-Chretien (Coma-Free Two-Mirror Reflecting System with Hyperbolic Primary and Secondary Elements) |
| Aperture | 500 mm (19.69 inches) |
| Focal Length | 4000 mm |
| Focal Ratio | f/8 |
| Optical Coatings | High-Reflectivity Multi-Layer Aluminum Coating Matrix with 96% Protected Reflectance Efficiency |
| Glass Material | Premium Low-Expansion Borosilicate Glass Primary and Secondary Mirror Substrates |
| Secondary Mirror Obstruction | 235 mm |
| Secondary Mirror Obstruction by Diameter | 47.0% |
| Secondary Mirror Obstruction by Area | 22.09% |
| Resolving Power | 0.23 Arcseconds (Dawes), 0.28 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 16.2 |
| Highest Useful Magnification | 1000x |
| Lowest Useful Magnification | 71x |
| Optical Tube Material | Open-Frame High-Modulus Carbon Fiber Truss Layout with Machined Clear Anodized Aerospace Aluminum Alloy Component Structural Rings (CGA) |
| Focuser Style & Mechanism | Electronic Secondary Mirror Focus Adjustment Drive Array with Internal Temperature Compensation Mechanics |
| Mirror Lock Mechanism | Yes (Fixed Multi-Point Fixed Optical Array Substrate Cell with Integrated Rear Axial Restraint Brackets) |
| Optical Tube Dimensions | 690 mm x 1480 mm |
| Optical Tube Weight | 75.00 kg (165.35 lbs) |
| Mount Attachment Type | Dual Heavy-Duty Losmandy-Style D-Plate Platform Rails Installed Top and Bottom |
| Finder Scope Specification | Not Included / Pre-drilled for Professional Auxiliary Target Tracker Brackets |
| Included Accessories | 500mm ProRC Hyperbolic OTA, Clear Anodized Components Framework, Integrated Multi-Fan Secondary Boundary Layer Thermal Extraction System, Electronic Focus Controller Interface Hub, Protective Fabric Truss Shroud Blanket |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Research-grade deep-space imaging and high-resolution digital telemetry collection, leveraging an open carbon frame structure to prevent structural drift during long-exposure capture cycles. |
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