Celestron SkyMaster 25×70
Model 71008
The Celestron SkyMaster 25×70 is designed for observing distant wildlife, landscapes, and celestial objects where high magnification and a stable view matter. Its 25× magnification, 70 mm objective lenses, BaK-4 Porro prisms, and multi-coated optics support detailed viewing across long distances. The included tripod adapter helps reduce hand shake during extended observation, while the water-resistant construction adds protection for outdoor use. Weighing approximately 1,474 g, this full-size binocular is best suited to stationary viewing rather than casual handheld use.
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Key Features
The Celestron SkyMaster 25×70 combines powerful magnification, large objective lenses, and tripod compatibility for detailed long-distance and astronomical observation.
25x
Magnification
70 mm
Objective Lens
BaK-4
Porro Prisms
Water-Resistant
Outdoor Use
Tripod-Ready
Adapter Included
Multi-Coated
Optics
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Quick Specifications
| Magnification | 25× |
|---|---|
| Objective Lens Diameter | 70 mm |
| Prism System | Porro, BaK-4 glass |
| Angular Field of View | 2.7° |
| Exit Pupil | 2.8 mm |
| Eye Relief | 13 mm |
| Weight | 1,474 g (52 oz) |
About This Model
The Celestron SkyMaster 25×70 is designed for long-distance terrestrial viewing and astronomical observation. Its 25× magnification brings distant subjects closer, while the 70 mm objective lenses gather light for viewing in suitable low-light conditions. The BaK-4 Porro prism system and multi-coated optics support image contrast, making this full-size binocular a practical option for observing the night sky and distant landscapes.
The SkyMaster 25×70 has a 2.7° angular field of view, a 2.8 mm exit pupil, and 13 mm eye relief. Its minimum focusing distance is approximately 23 m, so it is intended for distant subjects rather than close-up viewing. The center-focus system and adjustable interpupillary distance help users set up the binocular for their viewing needs. At approximately 1,474 g, it is relatively heavy for extended handheld use.
A tripod adapter is included to help stabilize the image at 25× magnification, particularly during prolonged astronomical sessions. The binocular has a rubber-covered body and water-resistant construction, but it is not nitrogen-filled and should not be described as waterproof or fogproof. The package includes a carrying case, neck strap, lens caps, rainguard, lens cloth, and instruction manual. These features make the SkyMaster 25×70 best suited to stationary observation with a tripod available when needed.
Full Specifications
The Celestron SkyMaster 25×70 is a full-size binocular designed for long-distance terrestrial observation and astronomy. Its 25× magnification, 70 mm objective lenses, BaK-4 Porro prisms, and multi-coated optics define its optical configuration, while the included tripod adapter supports more stable viewing. The full specifications below cover its optical performance, focusing system, physical dimensions, construction, and included accessories.
| Brand | Celestron |
|---|---|
| Model | SkyMaster 25×70 |
| Manufacturer Item Number | 71008 |
| Binocular Type | Full-Size Porro Prism Binoculars |
| Magnification | 25× |
| Objective Lens Diameter | 70 mm (2.75 in) |
| Objective Lens Focal Length | 279.63 mm (11 in) |
| Prism System | Porro |
| Prism Glass | BaK-4 |
| Prism Coatings | N/A |
| Lens Coatings | Multi-Coated |
| Angular Field of View | 2.7° |
| Linear Field of View | 47 m at 1,000 m (141 ft at 1,000 yd) |
| Exit Pupil Diameter | 2.8 mm (0.11 in) |
| Relative Brightness | 7.84 |
| Twilight Factor | 41.83 |
| Limiting Stellar Magnitude | Ideal: 11.73; Moderate: 10.73; Poor: 9.73 |
| Eye Relief | 13 mm (0.51 in) |
| Minimum Focusing Distance | 23 m (75 ft) |
| Focusing System | Center Focus |
| Interpupillary Distance | 56–72 mm (2.20–2.83 in) |
| Diopter Adjustment Range | −4 to +8 |
| Tripod Adaptable | Yes |
| Tripod Adapter | Included |
| Body Construction | Protective Rubber Covering |
| Environmental Protection | Water-Resistant |
| Nitrogen-Filled | No |
| Weight | 1,474 g (52 oz) |
| Dimensions | 220 × 110 × 280 mm (8.7 × 4.3 × 11.0 in) |
| Carrying Case | Nylon |
| Included Accessories | Objective Lens Caps; Tripod Adapter; Rainguard; Carrying Case; Neck Strap; Lens Cloth; Instruction Manual |
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