40X Zoom Astronomy Binoculars

• High-quality, long-distance binoculars

• Zooms from 18X to 40X

• 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

• Includes lens caps, carrying case, rain guard, lens cloth and neck strap

• Attaches to any standard tripod for extra stability (tripod not included)

• Objective lens diameter: 3.15"

• 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. @18x

• Interpupillary distance (max): 2.83"

• Interpupillary distance (min): 2.2"

• Diopter adjustment range: -4 to +10

• Twilight factor: 44.72

• Relative brightness: 10.24

• Water resistant

WARNING: Never look directly at the sun with the naked eye or with this product, as permanent and irreversible eye damage may result.