Celestron Skymaster 18 – 40X40 binoculars

Description

Magnification: 18-40x

Objective Lens Diameter:¬†¬†¬†¬†¬†¬† 80mm (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 (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

Limiting Stellar Magnitude:    Ideal: 12.01

Moderate: 11.01

Poor: 10.01

Lens Coatings:            Multi-Coated

Prism Glass (Type):     BaK-4

Prism Coatings:           N/A

Weight:           76 oz (2155 g)

Environmental Protection:      Water Resistant

Nitrogen Filled:           No

Tripod Adaptable:       Yes

Carrying Case:            Nylon

Dimensions:¬†¬†¬† 228mm x 120mm x 355mm (9.0″ x 4.7″x 14.0″)

Included Items:           Objective lens caps, Rainguard, Carrying case, Neck strap, 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.