Expanded Specifications Celestron SkyMaster Pro ED 20x80mm Porro Binocular
| Magnification: | 20x |
| Objective Lens Diameter: | 80mm (3.15") |
| Focal Length of Objective Lens: | TBD |
| Angular Field of View: | 3.4° |
| Linear Field of View (@1000 yds) / @1000 m): | 178 ft (59 m) |
| Exit Pupil: | 4.0mm (.16") |
| Eye Relief: | 15.4mm (.61") |
| Close Focus: | 98.4 ft (30 m) |
| Interpupillary Distance (max): | 72mm (2.83") |
| Interpupillary Distance (min): | 56mm (2.20") |
| Diopter Adjustment Range: | ±3 |
| Twilight Factor | 40 |
| Relative Brightness: | 16 |
| Limiting Stellar Magnitude: | Ideal:12.02 |Moderate:11.02 |Poor:10.02 |
| Lens Coatings: | Fully Multi-Coated - XLT Coatings |
| Prism Glass (Type): | BaK-4 |
| Prism Coatings: | N/A |
| Weight: | 123.2 oz (3,492g) |
| Environmental Protection: | Waterproof (IPX7) |
| Nitrogen Filled: | Yes |
| Tripod Adaptable: | Yes |
| Carrying Case: | Deluxe Nylon |
| Dimensions: | 335mm x 230mm x 94mm (13.2" x 9.1" x 3.7") |
| Included Items: | Binoculars Objective lens caps Eyepiece Covers Rainguard Neck strap Lens cloth Non-Silica Dessicant Case Instruction manual |
