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Officina Stellare RH 300/900 Veloce AT f/3 Riccardi-Honders OTA Specs
| Brand | Officina Stellare |
| Full Model Code | Officina Stellare Veloce RH 300 AT Ultra-Fast Large Aperture Athermal Riccardi-Honders Astrograph Optical Tube Assembly |
| Country of Origin | Italy |
| Optical Design | Riccardi-Honders Astrograph (Catadioptric Configuration with Primary Meniscus Corrector Element and Rear Doublet Corrector Array) |
| Aperture | 300 mm (11.81 inches) |
| Focal Length | 900 mm |
| Focal Ratio | f/3 |
| Optical Coatings | Broadband Multi-Layer Anti-Reflective Optical Window Matrix with Multi-Layer Internal Reflective Mirror Enhanced Treatments |
| Glass Material | Premium Low-Expansion Optical Substrates with Thermo-Compensated Lens Element Separation Mounting Rings |
| Secondary Mirror Obstruction | 165 mm |
| Secondary Mirror Obstruction by Diameter | 55.0% |
| Secondary Mirror Obstruction by Area | 30.25% |
| Resolving Power | 0.39 Arcseconds (Dawes), 0.46 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 15.1 |
| Highest Useful Magnification | 600x |
| Lowest Useful Magnification | 43x |
| Optical Tube Material | Fully Enclosed Carbon Fiber Tube Assembly with Hard Anodized Internal Baffled Aerospace Aluminum Rings (Athermal AT Framework) |
| Focuser Style & Mechanism | Heavy-Duty External RCOS or Starlight Instruments Feathertouch Precision Interface Layout Compatibility Nodes |
| Mirror Lock Mechanism | Yes (Fixed Primary Layout Frame Form Factor Encased in Internal Solid-State Cells) |
| Optical Tube Dimensions | 365 mm x 790 mm |
| Optical Tube Weight | 24.50 kg (54.01 lbs) |
| Mount Attachment Type | Integrated Losmandy-Style D-Plate Platform Rail Attached Directly to Main Shell Base |
| Finder Scope Specification | Not Included / Pre-machined and Tapped Dual Auxiliary Anchor Blocks Fitted |
| Included Accessories | 300mm Veloce RH OTA, Integrated Thermo-Compensating Machined Stabilization Components, Multi-Point Heavy Duty Losmandy Base Plate, Protective Soft Core Transportation Wrap Bag |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Elite wide-field astrophotography networks tracking faint targets, deploying a large 12-inch aperture surface paired with a flat focal frame layout to secure edge-to-edge pinpoint clarity across large sensors. |
























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