Celestron–Nature DX ED 10x42 Premium Binoculars

Extra-Low Dispersion (ED) objective lenses provide high resolution, high contrast images that are virtually free of optical defects like chromatic aberration (color fringing)
Fully multi-coated optics deliver maximum light transmission through the optical path
Phase coated BaK-4 prisms produce vivid, true-to-life colors
Eyeglass friendly - generous eye relief and sturdy, twist-up eyecups with multiple stops
6.5' close focus
 
GENERAL
 
Magnification:
10x
Objective Lens Diameter:
42mm (1.65")
Angular Field of View:
5.9°
Linear Field of View (@1000 yds) / @1000 m):
309 ft (103 m)
Exit Pupil:
4.1mm (0.16")
Eye Relief:
14.3mm (0.56")
Close Focus:
6.5 ft (2 m)
Interpupillary Distance (max):
74mm (2.91")
Interpupillary Distance (min):
56mm (2.20")
Diopter Adjustment Range:
±3
Twilight Factor:
20.49
Relative Brightness:
16.81
Limiting Stellar Magnitude:
Ideal: 10.62 
Moderate: 9.62 
Poor: 8.62
Lens Coatings:
Fully Multi-Coated
Prism Glass (Type):
Bak-4
Prism Coatings:
Phase Coated
Weight:
24.9 oz (705 g)
Environmental Protection:
Waterproof
Nitrogen Filled:
Yes
Tripod Adaptable:
Yes
Carrying Case:
Padded nylon canvas
Dimensions:
142mm x 128mm x 56mm (5.6" x 5" x 2.2")
Included Items:
Neck strap 
Objective lens caps 
Rainguard 
Carrying case 
Lens cloth 
Instruction manual
Solar Warning
Never look directly at the Sun with the naked eye or with this optic. Permanent and irreversible eye damage may result.
Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.
Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.