Celestron SkyMaster 20×80 - Astronomy binoculars

Celestron SkyMaster 20×80 - Giant high-luminosity binoculars for long-distance observation and astronomy

Visit Celestron SkyMaster 20×80 are among the most popular giant binoculars for astronomers and long-distance terrestrial observers. With a 20x magnification and huge 80 mm lenses, They are designed for maximum brightness in low-light conditions, as well as impressive detail on distant subjects.

Thanks to their Porro BaK-4 prisms, their multi-layer lenses and their very precise focus, SkyMaster 20×80 lenses offer a bright, high-contrast field of view perfectly suited to observing the night sky, landscapes, mountainous terrain or distant subjects. They also feature a integrated tripod adapter rod, particularly useful given their weight and power.

Giant 80 mm lenses: maximum brightness

The objectives of 80 mm collect much more light than standard binoculars, enabling :

• a excellent visibility at dusk and in dark conditions ;
• easy observation of the brilliant deep-sky objects (clusters, nebulae, multiple stars) ;
• the ability to distinguish between details of far-flung terrestrial subjects ;
• a high twilight factor 40, a guarantee of low-light performance.

The focal length of the lenses (328.6 mm) gives a light ratio of around f/4.1 - very effective for maximizing the brilliance of the objects observed.

20x magnification: perfect for astronomy and long-distance work

Magnification 20x is an excellent compromise between power and ease of use:

• powerful enough to reveal lunar details, star clusters or distant landscape features; ;
• more stable than 25x or 30x while remaining highly immersive ;
• suitable for both astronomy and daytime observation.

Combined with a 4 mm, These binoculars offer far superior low-light viewing comfort compared with smaller-pupil models.

Wide field of vision for comfortable viewing

Despite their power, the SkyMaster 20×80 offer a pleasant field of view:

• Angular field : 3,7°
• Linear field Dimensions : 195 ft to 1000 yds (≈ 65 m to 1000 m)
• Minimum focusing distance : 33 m
• Exceptional eye relief 18 mm - ideal for spectacle wearers

Viewing is therefore immersive, bright and comfortable, even during long sessions.

BaK-4 prisms and Multi-Coated optics

Optical quality is one of the SkyMaster 20×80's strong points. They include :

• Porro prisms in BaK-4 glass for high light transmission and a perfectly clear pupil.
• Multi-Coated treatments on lenses for a enhanced contrast and reduced glare.
• Very sharp focus across the entire field, thanks to the optimized internal focusing system.

The result: luminous images, more punctual stars and a visual quality adapted to the demands of amateur astronomy.

Robust construction and secure grip

The SkyMaster 20×80 offers solid, reliable construction:

• Rubber coating for a optimal grip and good protection against light shocks.
• Water resistance (water-resistant) for outdoor use.
• Durable structure ideal for the mountains, seaside or overnights.

Please note: the binoculars are not nitrogen-filled, so they are not totally impervious to internal fogging.

Integrated tripod mount for maximum stability

Given their considerable weight (2.126 kg) and their magnification, comfortable observation requires the use of a tripod. Celestron makes this easy with :

• a integrated tripod adapter rod, more stable than a simple screw adapter; ;
• a universal compatibility with most photo and video tripods.

With a tripod, SkyMaster 20×80s reveal all their optical quality and become a formidable instrument for scrutinizing the sky or distant landscapes.

Accessories included

The binoculars are delivered ready to use, with all the essential accessories:

• Lens caps
• Rainguard (eye protection)
• Nylon carrying case
• Neck strap
• Cleaning cloth
• Instruction manual

Astronomy performance

With their large lenses and comfortable exit pupil, SkyMaster 20×80s are an excellent choice for the night sky:

• Magnitude limit up to 12,0 under excellent skies.
• Moderate sky : 11,0 about.
• In poor skies : 10,0.
• Beautiful views of the Moon, open clusters (Pleiades, Hyades), globular clusters (M13, M3), bright nebulae and more.

For a motivated beginner or an amateur looking for a simple yet powerful solution, these binoculars offer a real gateway to astronomy.

Detailed technical specifications

Solar safety warning

Never observe the sun with these binoculars without a certified sun filter.

• Never look directly at the Sun, with or without optics: risk of irreversible eye damage.
• Never project an image of the Sun through binoculars: risk of internal heat damage.
• Do not leave the instrument unattended, especially in the presence of children.

Who are Celestron SkyMaster 20×80 for?

These binoculars are designed for amateur astronomers, to nature observers and long-distance enthusiasts who want a bright, powerful and immersive lens. They offer an excellent compromise between performance, price, versatility and ease of use.