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Officina Stellare RH 250/1400 Ultra Veloce AT f/5.6 Riccardi-Honders OTA Specs
| Brand | Officina Stellare |
| Full Model Code | Officina Stellare Ultra Veloce RH 250 AT Extended Focal 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 | 250 mm (9.84 inches) |
| Focal Length | 1400 mm |
| Focal Ratio | f/5.6 |
| 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 | 125 mm |
| Secondary Mirror Obstruction by Diameter | 50.0% |
| Secondary Mirror Obstruction by Area | 25.00% |
| Resolving Power | 0.46 Arcseconds (Dawes), 0.55 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 14.7 |
| Highest Useful Magnification | 500x |
| Lowest Useful Magnification | 36x |
| 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 | 300 mm x 720 mm |
| Optical Tube Weight | 14.80 kg (32.63 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 | 250mm Ultra 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 | High-resolution deep-sky imaging tasks across medium-sized visual fields, combining a larger aperture grid to map intricate filament detail across distant clusters. |
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