Description

 

Original SkyMaster 25x70mm Porro Binoculars with Large Aperture for Celestron Astronomical Viewing

Description:
SkyMaster Series of large aperture binoculars are a phenomenal value for high performance binoculars ideal for astronomical viewing or for terrestrial (land) use - especially over long distances. Each SkyMaster model features high quality BaK-4 prisms and multi-coated optics for enhanced contrast. We have designed and engineered the larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions.

The 25x70mm version is one of the most popular models in the series. It offers serious large aperture light gathering in an affordable and reasonably lightweight configuration.

Features:
* 25x magnification porro prism binocular
* Large 70 mm objective lens offers maximum image brightness in low-light and long-range conditions
* Ultra sharp focus across the field of view
* Multi-coated optics for sharp, clear views
* Suitable for terrestrial or astronomical viewing
* Protective rubber covering for ultra-firm grip
* Large center focus knob for easy focusing
* Tripod adapter included
* Long eye relief ideal for eyeglass wearers
* Carrying case included for travel and safe storage

Specifications:
* Magnification: 25x
* Objective Lens Diameter: 70mm (2.75")
* Focal Length of Objective Lens: 279.63mm (11")
* Angular Field of View: 2.7°
* Linear Field of View (at 1000 yds / at 1000 m): 141 ft (47 m)
* Exit Pupil: 2.8mm (0.11")
* Eye Relief: 13mm (0.51")
* Close Focus: 75 ft (23 m)
* Interpupillary Distance (Max): 72mm (2.83")
* Interpupillary Distance (Min): 56mm (2.20")
* Diopter Adjustment Range: -4 to +8
* Twilight Factor: 41.83
* Relative Brightness: 7.84
* Limiting Stellar Magnitude: Ideal: 11.73; Moderate: 10.73; Poor: 9.73
* Lens Coatings: Multi-Coated
* Prism Glass (Type): BaK-4
* Prism Coatings: N/A
* Weight: 52 oz (1474 g)
* Environmental Protection: Water Resistant
* Nitrogen Filled: No
* Tripod Adaptable: Yes
* Carrying Case: Nylon
* Dimensions: 220mm × 110mm × 280mm (8.7" × 4.3" × 11.0")

Packing List:
* 1 x Portable backpack
* 1 x Telescope
* 1 x Tripod mounting bracket
* 1 x Shoulder strap
* 1 x Lens cleaning cloth
* 1 x Eyepiece cover
* 2 x Objective lens covers

Packaging Details:
* Weight: 3kg

Solar Warning:
* Never look directly at the Sun with the naked eye or with this optic. Permanent and irreversible eye damage may result.
* Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.
* Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.