Pentax 9x28 A-Series AD WP Binoculars

Pentax's 9x28 A-Series AD WP Binoculars feature an exciting transitional magnification that produces an enhanced viewing experience over a lower power without the visible hand-shake often associated with higher magnifications The BAK4 roof prisms are phase-corrected to improve image contrast and enhance color rendition All of the optics are anti-reflection fully multicoated to maximize light transmission to produce the brightest views possibleTo help cut weight - the housing is made of corrosion and impact-resistant fiberglass reinforced polycarbonate polymer They are also temperature-resistant allowing for their use in extreme climates while reducing expansion and contraction wide temperature swings can cause which can make the optical components move out of collimation over time Their optical tubes are nitrogen-filled and O-ring sealed so they can are submersible to 33' - as well as fogproof in all weather conditions

Features: Phase-Corrected BAK4 Roof Prisms, Fully Multicoated Optics, Angle of View: 50°, Nitrogen-Filled, Water and Fogproof, Closed Bridge Configuration, Reinforced Polycarbonate Housing, Center Focusing, Twist-Up Eyecups

Prism Type: Roof

Magnification: 9x

Objective Lens Diameter: 28 mm

Angle of View: 5.6 degrees (Actual)

Field of View: 294' @ 1000 yd / 98 m @ 1000 m

Minimum Focus Distance: 9.8' / 3 m

Exit Pupil Diameter: 3.1 mm

Eye Relief: 18 mm

Diopter Adjustment: Yes

Focus Type: Center

Fogproof: Yes - Nitrogen Filled

Environmental Resistance: Water-Resistant (Unrated)

Dimensions: 4.6 x 4.5 x 1.7-inch / 11.7 x 11.4 x 4.3 cm

Weight: 12.8 oz / 362.9 g