Celestron SkyMaster Pro 15x70 Porro Prism Binoculars — A premium large-aperture 15×70 Porro binocular for astronomy and long-range viewing, combining Celestron XLT fully multi-coated optics, BaK-4 prisms, waterproof nitrogen-filled construction and a supplied tripod adapter.
Premium 70mm Astronomy Binoculars
The 70mm objectives provide strong light gathering for star clusters, the Moon, brighter nebulae and low-light terrestrial subjects. At 15×, the binocular delivers noticeably more detail than standard handheld models while retaining a useful 4.4° field.
XLT Fully Multi-Coated Optics
Every air-to-glass surface uses Celestron’s proprietary XLT multi-coating system. Combined with BaK-4 Porro prisms, these coatings are designed to increase light transmission and deliver crisp, high-contrast views.
Centre focusing adjusts both barrels, while the right-eyepiece dioptre compensates for differences between the user’s eyes. The supplied standard eyecups can be exchanged for winged eyecups when additional protection from stray light is helpful.
Waterproof and Nitrogen Filled
The rubber-armoured polycarbonate and aluminium housing is waterproof and filled with dry nitrogen gas to reduce internal fogging when the binocular moves between temperature extremes or is used in damp conditions.
Waterproof construction improves protection during normal outdoor use but does not make the binocular suitable for immersion or careless storage while wet.
Tripod Mounting and Reflex Sight Ready Rail
The supplied tripod adapter attaches beneath the front logo plate and supports stable viewing on a suitable photographic or astronomical tripod. A tripod is strongly recommended for prolonged 15× observing and is sold separately.
The included detachable Reflex Sight Ready rail accepts a compatible optional red-dot finderscope, helping the user locate and centre distant objects more quickly. The red-dot finder is not included.
What Is Included?
- SkyMaster Pro 15x70 binoculars
- Removable binocular tripod adapter
- Detachable Reflex Sight Ready rail
- Standard fold-down eyecups
- Interchangeable winged eyecups
- Objective lens caps
- Eyepiece rainguard
- Neck strap
- Deluxe nylon carrying case
- Lens-cleaning cloth
- Five-language instruction manual
Please note: A tripod, red-dot finderscope, solar filters and any item not listed above are not stated as included.
Specifications
Optics
| Optical design | Porro prism binocular |
|---|---|
| Magnification | 15× |
| Objective diameter | 70mm |
| Objective focal length | 279.68mm |
| Angular field of view | 4.4° |
| Linear field of view | 77m at 1,000m |
| Exit pupil | 4.6mm |
| Eye relief | 17mm |
| Close focus | 15m (49.2ft) |
| Interpupillary distance | 56–72mm |
| Dioptre adjustment | ±4 |
| Focusing system | Centre focus with right-eyepiece dioptre |
| Lens coatings | Fully multi-coated with Celestron XLT coatings |
| Prism glass | BaK-4 |
| Twilight factor | 32.4 |
| Relative brightness | 21.16 |
| Limiting stellar magnitude | 11.73 ideal; 10.73 moderate; 9.73 poor conditions |
Construction and Size
| Environmental protection | Waterproof |
|---|---|
| Nitrogen filled | Yes |
| Tripod mounting | Tripod adaptable; removable tripod adapter included |
| Reflex-sight rail | Detachable Reflex Sight Ready rail included; red-dot finderscope sold separately |
| Carrying case | Deluxe nylon carrying case |
| Dimensions | 276.9 × 221 × 86.4mm (10.9 × 8.7 × 3.4 inches) |
| Binocular weight | 1.450kg (51oz) |
Solar Safety
Warning: Never look at or near the Sun through these binoculars.
These are not solar binoculars and do not include certified solar filters. Direct or nearby views of the Sun can cause immediate and permanent eye injury.
Do not attempt solar projection and do not attach improvised or eyepiece-mounted filters.
Instruction Manual
The official SkyMaster Pro instruction manual covers both models and is provided in English, French, Spanish, German and Italian.