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Geoptik Dobson N 404/1815 Nadirus 16" Kit No Optics Specs
| Brand | Geoptik |
| Full Model Code | Geoptik Nadirus 16-inch Wood Structural Kit without Optical Elements (40A180K) |
| Country of Origin | Italy |
| Optical Design | Newtonian Dobsonian (Mechanical Framework Only; Requires 404mm Primary and Secondary Glass) |
| Aperture | 404 mm (15.9 inches) - Target Specification |
| Focal Length | 1815 mm - Target Specification |
| Focal Ratio | f/4.5 - Target Specification |
| Optical Coatings | None (Dependent on User-Supplied Optics) |
| Secondary Mirror Obstruction | Configurable (82 mm Support Spider Profile Pre-installed) |
| Secondary Mirror Obstruction by Diameter | Dependent on Final Secondary Selection |
| Secondary Mirror Obstruction by Area | Dependent on Final Secondary Selection |
| Resolving Power | 0.29 Arcseconds (Dawes; Achievable upon installation of premium matching diffraction limits) |
| Optical Tube Material | Premium Hand-Selected CNC-Machined Multi-Layer Beech Wood Structure with Carbon Fiber Truss Columns |
| Focuser Style & Mechanism | Pre-Drilled Base Plate to accept standard 2.0-inch Crayford or Feather Touch Focuser Assemblies |
| Mirror Lock Mechanism | No (Integrated 18-Point Flotation Mirror Cell with Delrin Radial Support Pads) |
| Optical Tube Dimensions | Truss Construction (Mirror Box Footprint: 580 mm x 580 mm x 420 mm) |
| Optical Tube Weight | 26.50 kg (58.4 lbs) - Bare Structural Assembly without Primary or Secondary Mirrors |
| Mount Attachment Type | Heavy-Duty Laminated Wooden Rocker Box Base with Oversized Altitude Arcs and Virgin Teflon Bearings |
| Finder Scope Specification | Optional Accessory Slot Configuration |
| Included Accessories | Handcrafted Wooden Mirror Box with Cell, Secondary Cage Ring with Spider, 8x Carbon Fiber Truss Rods, Left and Right Altitude Hubs, Ground Rocker Base Assembly |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Custom observatory-grade telescope integration and personalized deep-sky instrument tailoring, leveraging a low-expansion timber framework to damp structural vibrations during fine field adjustments. |
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