Vortex 8x42 Diamondback HD Binoculars
Optical Performance
* Roof prism design
* 8x magnification
* 42mm objective lenses
* Fully multicoated lenses increase transmission, clarity, and brightness
* Dielectric-coated, phase-correcting roof prisms improve true color, contrast, and transmission
* 7.5° angle of view
* 393' linear field of view at 1000 yards
* Birding-friendly 5' close focus distance
* Exit Pupil: 5.3mm
* Eye Relief: 17mm
Use and Handling
* Short-hinge bridge cuts weight and exposes more surface for handling
* Adjustable interpupillary distance: 55-73mm
* Oversized knurled center focusing wheel
* Textured diopter ring on right eyepiece
* Twist-up soft tapered rubber eyecups
Construction Details
* GlassPak binoculars harness with zippered accessory pocket
* Protective rubber armor provides a slip-resistant grip
* O-ring sealed and argon filled to be waterproof and resistant to internal fogging when moving through extreme temperature and environmental conditions
* Scratch-resistant ArmorTek exterior lens coatings repel oils and corrosive materials from lenses

Prism Type    Roof
Magnification    8x
Objective Lens Diameter    42 mm
Angle of View    7.5° (Actual)
Field of View    393' @ 1000 yd / 130.48 m @ 1000 m
Exit Pupil Diameter    5.3 mm
Prism Type    Roof
* Performance
Magnification    8x
Objective Lens Diameter    42 mm
Angle of View    7.5° (Actual)
Field of View    393' @ 1000 yd / 130.48 m @ 1000 m
Minimum Focus Distance    5' / 1.52 m
Exit Pupil Diameter    5.3 mm
Eye Relief    17 mm
Interpupillary Adjustment    55 to 73 mm / 2.2 to 2.9"
Diopter Adjustment    Yes
Focus Type    Center
Features
Fogproof    Yes: Argon Filled
Environmental Resistance    Water-Resistant (Unrated)
General
Dimensions    5.7 x 5.1" / 14.48 x 12.95 cm
Weight    21.8 oz / 618 g