Celestron Skymaster 18-40x80mm Zoom Porro Binoculars

The Celestron Skymaster 18-40x80mm Zoom Porro Binoculars are a phenomenal value for high-performance binoculars. Ideal for astronomical viewing or for terrestrial (land) use, especially over long distances.

SkyMaster models feature high-quality BaK-4 prisms and multi-coated optics for enhanced contrast. Celestron has designed and engineered the larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions.

FEATURES

• Lower magnification allows the user to locate a subject more easily and then zoom in for a close-up view
• Multi-coated optics enhances sharpness of detail and crispness of color
• High quality BaK-4 prisms provide higher light transmission for better viewing in low light conditions
• Large objective diameter provides a comfortable viewing aperture at high magnification levels
• Long eye relief for more comfortable for all users; essential for those wearing eyeglasses while viewing
• Diopter adjustment allows for refinement of image to correct for any differences in strength between the users own eyes
• Tripod adapter included to mount the binocular on a tripod for prolonged viewing sessions or simply for increased stability while observing
• Limited Lifetime Warranty

SPECIFICATIONS

• Magnification: 18-40x
• Objective Lens Diameter: 80mm (3.15″)
• Focal Length of Objective Lens: 328.6mm (12.94″)
• Angular Field of View: 18: 1.9°
• Linear Field of View (@1000 yds) / @1000 m): 96 ft (33.2 m) @18x
• Exit Pupil: 4.4 @18x / 2.0 @40x
• Eye Relief: 20.3 @18x
• Close Focus: 106.2 ft (32.4 m) @18x
• Interpupillary Distance (max): 72mm (2.83″)
• Interpupillary Distance (min): 56mm (2.20″)
• Diopter Adjustment Range: -4 to +10
• Twilight Factor: 44.72
• Relative Brightness: 10.24