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National Geographic N 114/900 AZ Telescope Specs
| Brand | National Geographic |
| Full Model Code | National Geographic 114/900 Alt-Azimuth Newtonian Reflector Telescope (9011200) |
| Country of Origin | China |
| Optical Design | Newtonian Reflector (Spherical Primary Mirror Layout) |
| Aperture | 114 mm (4.5 inches) |
| Focal Length | 900 mm |
| Focal Ratio | f/7.9 |
| Optical Coatings | Aluminum Multi-Layer Vacuum Coating Matrix with Protective Silicon Dioxide Layer |
| Glass Material | Standard Plate Glass Optical Mirror Substrate with Molded Structural Cell Core |
| Secondary Mirror Obstruction | 32 mm |
| Secondary Mirror Obstruction by Diameter | 28.1% |
| Secondary Mirror Obstruction by Area | 7.88% |
| Resolving Power | 1.02 Arcseconds (Dawes), 1.22 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 12.8 |
| Highest Useful Magnification | 228x |
| Lowest Useful Magnification | 16x |
| Optical Tube Material | Roll-Formed Steel Cylindrical Shell with Protective Composite Edge Trim |
| Focuser Style & Mechanism | 1.25-inch Standard Drawtube Focus Housing with Polymer Rack & Pinion Track Gears |
| Mirror Lock Mechanism | No |
| Optical Tube Dimensions | 142 mm x 860 mm |
| Optical Tube Weight | 2.60 kg (5.73 lbs) - OTA Only / 4.90 kg (10.80 lbs) - Total System with Mount |
| Mount Attachment Type | Direct Yoke Mount Frame Cradle Threaded Clamping Joint Assembly |
| Finder Scope Specification | 6x25 Optical Finder Scope with Crosshair Ring Frame Alignment Fitting |
| Included Accessories | 114mm Reflector OTA, Alt-Azimuth Yoke Mount with Altitude Fine-Adjustment Rod, Aluminum Tripod with Accessory Tray, Three Eyepieces (H 20mm - 45x, H 12.5mm - 72x, SR 4mm - 225x), 1.5x Erecting Lens, 3x Barlow Lens, 6x25 Finder |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Amateur high-magnification manual tracking of moon surfaces and Saturnian rings, deploying a long focal frame to isolate structural target features without distortion. |
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