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Bresser AC 102/460 Messier Hexafoc Refractor OTA Specs
| Brand | Bresser |
| Full Model Code | Bresser Messier AC 102/460 OTA |
| Country of Origin | Germany |
| Optical Design | Achromatic Refractor (Rich-Field Configuration) |
| Aperture | 102 mm (4.01 inches) |
| Focal Length | 460 mm |
| Focal Ratio | f/4.5 |
| Optical Coatings | Multi-Coated Optics |
| Secondary Mirror Obstruction | 0 mm (0%) |
| Secondary Mirror Obstruction by Area | 0% |
| Backfocus Distance | 110 mm |
| Rear Cell Thread Type | M42x0.75 Male T-thread via integrated adapter |
| Image Circle Diameter | 38 mm |
| Resolving Power | 1.14 Arcseconds |
| Limiting Visual Magnitude | 11.8 |
| Highest Useful Magnification | 200x |
| Lowest Useful Magnification | 15x |
| Optical Tube Material | Aluminum |
| Focuser Style & Mechanism | 2.5-inch Hexafoc Heavy-Duty Rack and Pinion Focuser |
| Mirror Lock Mechanism | No (Refractor Tube Configuration) |
| Optical Tube Dimensions | 103 mm x 460 mm |
| Optical Tube Weight | 2.8 kg (6.17 lbs) |
| Mount Attachment Type | Universal Vixen-Style Dovetail Bar with Stainless Steel Rail Protection |
| Finder Scope Specification | 6x30 Optical Finder Scope |
| Included Accessories | 26mm Super Plossl Eyepiece (18x), 2-inch Zenith Mirror (90-degree), 1.25-inch Reducer Adapter, Tube Rings with Carrying Handle and Integrated Piggyback Camera Mount |
| Power Requirements | None |
| Standard Warranty | 2-Year Factory Warranty |
| Application | Custom configuration standalone tube assembly for rich-field deep-sky observation or secondary wide-field tracking, requiring an independent alt-azimuth or equatorial mount with a minimum payload capacity of 5 kg. |
























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