Celestron SkyMaster Pro ED 20x80mm Porro Binoculars

Celestron SkyMaster Pro ED binoculars are the ideal choice for amateur astronomers or anyone who observes at great distances.

The SkyMaster Pro ED uses superior optics, coatings, internal parts, and housing materials. With large objective lenses, BaK-4 prisms, ED glass, and fully multi-coated optics utilizing Celestron’s proprietary XLT coating technology, the view through a SkyMaster Pro ED sets the standard for astronomy binoculars.

Celestron’s legendary SkyMaster binoculars get an upgrade with ED objective lenses for superior images virtually free of chromatic aberration with lifelike colour, increased resolution, and improved contrast
Large, 80mm objective lenses offer excellent light-gathering ability - perfect for astronomy
Threaded eyepieces accept all standard 1.25” astronomical eyepiece filters to bring out details or reduce the effects of light pollution
BaK-4 prisms and fully multi-coated optics with XLT coatings boost light transmission through the optical path for brighter, more detailed images
The widely spaced objective lenses of the Porro prism optical design provide an enhanced 3-D view
Eyeglass-friendly with generous eye relief and padded twist-up eyecups
Durable rubber-armored housing with improved ergonomics for comfortable use in the field
Tripod-adaptable for extended viewing sessions
ED Objective Lenses
Extra-Low Dispersion (ED) glass virtually eliminates chromatic aberration, also known as color fringing, a visual phenomenon common in magnified optical systems. SkyMaster Pro ED delivers edge-to-edge sharpness with excellent color correction and razor-sharp images.

Not all ED glass is created equal. Celestron’s high-quality ED glass delivers brighter, sharper images than non-ED binoculars. The difference is especially apparent in low-light conditions.

Coatings and Prisms
All of Celestron SkyMaster Pro ED’s lens surfaces are fully multi-coated and feature Celestron’s proprietary XLT optical coating technology. These powerful coatings, similar to the ones you’ll find on our observatory-grade telescopes, decrease reflectivity for higher optical throughput across a broad range of the visible light spectrum. What’s more, the prisms inside the binocular are made of high-quality BaK-4 glass, further boosting light transmission. Working together, the fully multi-coated lenses and BaK-4 prisms deliver more light from your target to your eye for brighter, more detailed views.

Objective Lenses
The large objective lenses offer plenty of light-gathering ability for superior low-light performance. The objective diameter-to-magnification ratio is ideal for scanning the skies, observing the Moon and planets, and exploring all the best deep-sky objects.

Celestron SkyMaster Pro ED also makes an excellent choice for long-distance land-based viewing - especially at dawn or dusk.

Ways to Observe
The Celestron SkyMaster Pro ED binocular is tripod-adaptable. You can use a binocular tripod adapter (not included) to mount it on any standard photographic tripod or monopod for extended viewing or digiscoping (photography through the eyepiece).

SkyMaster Pro ED’s eyepieces are threaded to accept standard 1.25” astronomical eyepiece filters. Adding the right filter can deliver game-changing views for terrestrial and celestial observing. For terrestrial observation, filters can reduce the brightness of sand, snow, and water. For nighttime viewing, filters can cut glare, minimize eye strain, increase contrast, and even combat the effects of light pollution. Remember, the binocular needs a set of two filters.

Specifications:
Magnification: 20x
Objective Lens Diameter: 80mm (3.15")
Focal Length of Objective Lens: TBD
Angular Field of View: 3.4°
Linear Field of View (@1000 yds) / @1000 m): 178 ft (59 m)
Exit Pupil: 4.0mm (.16")
Eye Relief: 15.4mm (.61")
Interpupillary Distance (max): 72mm (2.83")
Interpupillary Distance (min): 56mm (2.20")
Dioptre Adjustment Range: ±3
Twilight Factor: 40
Relative Brightness: 16
Limiting Stellar Magnitude: Ideal: 12.02 | Moderate: 11.02 | Poor: 10.02
Lens Coatings: Fully Multi-Coated - XLT Coatings
Prism Glass (Type): BaK-4
Prism Coatings: N/A
Environmental Protection: Waterproof (IPX7)
Nitrogen Filled: Yes
Tripod Adaptable: Yes
Carrying Case: Deluxe Nylon
Close Focus: 30 m
Dimensions: 33.5 x 23 x 9.4 cm
Weight: 3,492 g

What’s in the Box:
Celestron SkyMaster Pro ED 20x80mm Porro Binoculars
Case
Neck Strap
Objective lens caps
Eyepiece Covers
Rainguard
Lens cloth
Instruction manual