Celestron SkyMaster 25×100 - Astronomy binoculars

Celestron SkyMaster 25×100 - Giant binoculars for astronomy

Visit Celestron SkyMaster 25×100 represent the pinnacle of the SkyMaster range giant 100 mm binoculars with a 25x magnification, designed to offer performance comparable to that of a small telescope, while retaining the visual comfort of a pair of binoculars.
They are ideal for astronomy, long-distance observation, tracking deep-sky objects, studying distant landscapes or marine observation.

Thanks to their enormous light-gathering BaK-4 prisms and their multi-layer lenses, These binoculars deliver bright, high-contrast, highly detailed images. Their robust design and tripod mountability make them ideal for the discerning astronomer.

Giant 100 mm lenses: exceptional luminous power

SkyMaster 25×100 models are equipped with massive 100 mm, which are capable of collecting an enormous amount of light. This enables :

• greater visibility in the dark conditions and under the night sky; ;
• access to deep sky objects than 70 or 80 mm models; ;
• detailed observation of complex stellar regions ;
• excellent brightness for long distances over land; ;
• a very high twilight factor 50, perfect for low light.

With a lens focal length of 417 mm, These binoculars feature a brightness ratio of around f/4.2, which is highly effective in maximizing the clarity of night-time images.

25x magnification: lunar detail and brilliant stellar objects

Magnification 25x provides a remarkable level of detail:

• well-defined lunar craters, mountain ranges, rimae and lunar seas ;
• rich star clusters such as the Pleiades, the Double Perseus Cluster, M7, M11 ;
• globular clusters such as M13 or M3 appear granular ;
• some bright nebulae ;
• details of extremely remote terrestrial subjects.

This magnification is powerful but still usable, provided you use a stable tripod.

Wide field of vision despite power

SkyMaster 25×100 offer a generous field of view for their class:

• 3° angular field ;
• 156 ft to 1000 yds (≈ 52 m to 1000 m) ;
• Output pupil 4 mm, ideal for night vision ;
• Eye relief comfortable 15 mm.

The combination of field of view and aperture makes for a highly immersive experience, especially when observing the deep sky.

High-performance optics: BaK-4 and Multi-Coated

For maximum contrast and sharpness, Celestron equips these binoculars with high-quality optical components:

• Porro prisms in BaK-4 glass : well-rounded pupil, bright image, clean field edge.
• Multi-Coated lenses : reduced glare, improved contrast, natural colors.
• Ultra sharp focus all over the field.

This combination makes for spectacular viewing, especially of the Moon and dense stellar regions.

Robust, ergonomic construction

Celestron SkyMaster 25×100 are built to last and to withstand outdoor conditions:

• Rubber coating ensuring firm grip and good protection.
• Water resistance (water-resistant) for outdoor use.
• Reinforced structure adapted to their imposing size.

Note: these binoculars are not nitrogen-purged and are therefore not fully protected against internal fogging in extreme conditions.

Tripod essential: stability for 4 kg of optics

With a weight of almost 4 kg (3969 g), these binoculars absolutely require a sturdy mount or tripod.

• A integrated tripod stage for fast, secure fastening.
• Compatible with most rugged photo and video tripods.

When mounted on a tripod, the SkyMaster 25×100 becomes a true wide-field astronomical instrument.

Accessories included

The binoculars are supplied with all essential accessories:

• Lens caps
• Rainguard
• Nylon carrying case
• Neck strap
• Cleaning cloth
• Instruction manual

Astronomy performance

Thanks to their massive 100 mm aperture, SkyMaster 25×100 offer spectacular access to the sky:

• Magnitude limit up to 12,5 under excellent skies ;
• ≈ 11,5 en ciel modéré ;
• ≈ 10,5 en ciel médiocre.

They are particularly impressive on :

• the Moon ;
• visit open clusters ;
• visit bright globular clusters ;
• visit nebulous regions ;
• visit double stars shiny ;
• the Milky Way in wide field.

Detailed technical specifications

Solar safety warning

Never observe the Sun through these binoculars without a suitable solar filter.

• Never look directly at the Sun: risk of irreversible eye damage.
• Never project an image of the Sun through the binoculars: risk of ’sunburn".’fire or internal destruction.
• Never leave the instrument unattended.

Who are Celestron SkyMaster 25×100 for?

These binoculars are designed for passionate astronomers looking for a powerful, bright and immersive instrument, capable of rivaling a small-diameter telescope while offering a wide field of view and incomparable binocular vision.
They are also suitable for long-distance terrestrial observation for demanding users with a sturdy tripod.