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Officina Stellare RiFast 400/1520 CGC OTA Specs
| Brand | Officina Stellare |
| Full Model Code | Officina Stellare RiFast 400 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 | 400 mm (15.75 inches) |
| Focal Length | 1520 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 | 190 mm |
| Secondary Mirror Obstruction by Diameter | 47.5% |
| Secondary Mirror Obstruction by Area | 22.56% |
| Resolving Power | 0.29 Arcseconds (Dawes), 0.35 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 15.7 |
| Highest Useful Magnification | 800x |
| Lowest Useful Magnification | 57x |
| 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 | 560 mm x 1230 mm |
| Optical Tube Weight | 39.50 kg (87.08 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 | 400mm 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 | Large-format professional deep-sky imaging setups seeking total mass optimization across tracking mounts, utilizing specialized lightweight composite structural components to lower payload weight while safeguarding optical field alignment. |
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