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Officina Stellare RiFast 500/1900 CGC OTA Specs
| Brand | Officina Stellare |
| Full Model Code | Officina Stellare RiFast 500 Fast Newtonian-Derived Sub-Aperture Corrector Astrograph Optical Tube Assembly - CGC Edition |
| Country of Origin | Italy |
| Optical Design | Fast Riccardi-Fast Astrograph (Aspherical Primary Mirror Layout with Multi-Element Sub-Aperture Lens Corrector Cluster) |
| Aperture | 500 mm (19.69 inches) |
| Focal Length | 1900 mm |
| Focal Ratio | f/3.8 |
| Optical Coatings | High-Reflectivity Multi-Layer Aluminum Coating Matrix with 96% Protected Reflectance Efficiency |
| Glass Material | Premium Low-Expansion Borosilicate Glass Mirror Substrates paired with Premium Low-Dispersion Flattener Corrector Elements |
| Secondary Mirror Obstruction | 230 mm |
| Secondary Mirror Obstruction by Diameter | 46.7% |
| Secondary Mirror Obstruction by Area | 21.81% |
| 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 Dark Carbon Matrix Coated Component Rings and Core Couplers (CGC) |
| 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 | 710 mm x 1500 mm |
| Optical Tube Weight | 71.00 kg (156.53 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 RiFast Hyperbolic OTA, All-Carbon Structural Rings, 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 | Observatory-grade scientific field research mapping distant astronomical signals, combining a wide, high-speed f/3.8 field framework with a complete carbon composite design to deliver ultra-sharp imaging over large sensors. |
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