Celestron SkyMaster 25×70 - Giant binoculars

Celestron SkyMaster 25×70 - Giant binoculars for astronomical and long-distance observation

Visit Celestron SkyMaster 25×70 are giant binoculars specially designed for the’long-distance observation and first steps in astronomy. With a 25x magnification and large 70 mm lenses, They collect a large amount of light and offer detailed views of the Moon, star clusters, certain deep sky objects, as well as distant terrestrial subjects (ships, landforms, animals, etc.).

Sturdy, easy to handle and supplied with tripod adapter, case, strap and protectors, SkyMaster 25×70 binoculars are the ideal choice for those seeking powerful binoculars for both night sky and long-range daytime observation.

Luminous 70 mm optics with 25x magnification

The SkyMaster 25×70 combines a 25x magnification with large 70 mm lenses :

• 25x magnification Magnifies the target, ideal for the Moon, craters, mountains, details on distant objects, or bright star clusters.
• 70 mm lenses : large opening offering good brightness, especially in low-light conditions or at dusk.
• Lens focal length: 279.6 mm, This means an optical ratio of around f/4, which contributes to the image's brightness.

This combination retains a high level of detail while remaining bright enough for leisure astronomy and long-distance terrestrial observation.

Field of vision and ease of use

Despite the high magnification, these binoculars retain a usable field of view and comfortable to use:

• Angular field of view : 2,7°.
• Linear field 141 ft at 1000 yds (approx. 47 m at 1000 m).
• Output pupil 2.8 mm.
• Minimum focusing distance 75 ft (approx. 23 m).

The field of view remains sufficient to follow a subject or scan an area of the sky. The 2.8 mm exit pupil is well suited to observation at night or in low light, while limiting the impact of eye aberrations.

Comfort for spectacle wearers

The Celestron SkyMaster 25×70 are designed to be comfortable to use, even with glasses:

• Eye relief 13 mm, suitable for many spectacle wearers.
• Diopter adjustment from -4 to +8 on one eyepiece to compensate for differences between the two eyes.
• Adjustable interpupillary distance from 56 to 72 mm, covering most morphologies.

These features make it easy to find a comfortable position and a clear setting, even during long observation sessions.

Optical quality and BaK-4 prisms

SkyMaster 25×70s use high-quality optics to deliver sharp, high-contrast images:

• Porro-type prisms in glass BaK-4, ensuring good light transmission and well-defined pupil edges.
• Multi-Coated Optics multi-layer lens coatings improve contrast, sharpness and color fidelity.
• Image ultra-clear over the entire field of vision, suitable for both astronomy and terrestrial observation.

The result is a bright image, with more focused stars and better-defined details on distant subjects.

Sturdy construction and secure grip

SkyMaster 25×70 are designed to withstand regular outdoor use:

• Rubber coating over the entire surface, offering firm grip and limiting the risk of slipping.
• Moisture protection : binoculars water resistant, suitable for slightly damp or dewy ground conditions.
• Sturdy construction, ready for night-time outings, coastal walks or mountain observation.

Note: these binoculars are not nitrogen-filled, so they are not completely waterproof or purged against internal fogging, but they nevertheless offer a good level of protection for normal use.

Tripod use recommended

With a magnification of 25x and a weight of around 1.47 kg (52 oz), freehand use quickly becomes tiring and stability difficult to maintain. Celestron therefore supplies :

• a tripod adapter included,
• a fully compatible with most photo/video tripods.

To take full advantage of the potential of these binoculars - especially in astronomy - a sturdy tripod is highly recommended. It allows you to enjoy the field of view without shaking, and to make prolonged observations in excellent conditions of comfort.

Supplied accessories and transport

SkyMaster 25×70 are supplied with everything needed for easy use and transport:

• Lens caps.
• Tripod adapter.
• Rainguard (eye protection).
• Nylon carrying case for storage and transportation.
• Neck strap to carry them safely.
• Cleaning cloth for lenses.
• Instruction manual.

Dimensions: approx. 220 mm x 110 mm x 280 mm (8.7″ x 4.3″ x 11.0″), making them imposing binoculars but still easily transportable in a suitable bag.

Astronomy performance

Thanks to their aperture and magnification, the SkyMaster 25×70 provide access to a large number of objects in the night sky:

• Magnitude limit (under good skies) to around 11,7 (ideal), making it possible to see many open clusters, globular clusters and some bright nebulae.
• In more modest conditions, we stay around 10,7 (moderate sky) and 9,7 (polluted sky).
• Visit Moon reveals a multitude of craters, reliefs, lunar seas and shadows.
• Visit star cluster such as the Pleiades, the Double Perseus Cluster or certain Messier objects (M13, M11, etc.) are great fun to observe.

These binoculars are an excellent compromise for those who want to explore the sky without immediately investing in a telescope.

Detailed technical specifications

Solar safety warning

Warning: never use these binoculars to observe the sun without special protection.

• Never look directly at the Sun with the naked eye or through these binoculars. You risk permanent and irreversible eye damage.
• Never project the image of the Sun on a surface with the aid of binoculars: concentrated heat can irreversibly damage optics and accessories.
• Never leave binoculars pointed at the sun unattended, especially in the presence of children.

For solar observation, use only certified and adapted filters placed to objectives and scrupulously observe safety instructions.

Who are Celestron SkyMaster 25×70 for?

Celestron SkyMaster 25×70 are designed for curious about the night sky, to lovers of distant landscapes and all those who want a powerful pair of binoculars for exploring the world at great distances. They are a a highly attractive gateway to astronomy, All this with a full range of equipment and excellent optical quality for their class.