Nikon Aculon A211 7x35 bak-4 porro prism binocular
 
Product Highlights
 
Aspheric Lens Design
Lead- and Arsenic-Free Eco-Glass
BAK4 Traditional Porro Prisms
Anti-Reflection Multi-Coated Optics
Large Center Fast-Focus Knob
Tripod Mountable with Optional Adapter
Twist-Up Rubber Eyecups
Long Eye Relief and Wide Exit Pupil
Optical Performance 
 
7x power provides moderate magnification while helping to produce a comfortable exit pupil, despite the relatively small objectives, for easier low-light use
35mm objective lenses provide improved low-light performance versus compact models, without the bulk and weight of larger-objective models
Traditional Porro prism design makes it comfortable to hold and presents a rich depth of field
High-index BAK4 prisms deliver a round exit pupil and a crisp and clear image with limited edge distortion
Aspherical eyepiece lenses correct spherical aberrations to produce clear and crisp images, with reduced edge distortion and astigmatism
Anti-reflection multi-coated optics produce neutral and accurate color fidelity and improve contrast and image brightness
59° apparent angle of view approaches wide-angle to minimize the appearance of visible hand shake and present an immersive viewing experience
488-foot field of view at 1000 yards
Performance
Magnification 7x
Objective Lens Diameter 35 mm
Angle of View 9.3° (Actual)
Field of View 488' @ 1000 yd / 162 m @ 1000 m
Minimum Focus Distance 16.4' / 5 m
Exit Pupil Diameter 5 mm
Eye Relief 11.8 mm
Diopter Adjustment Yes
Focus Type Center
General
Dimensions 7.3 x 4.6" / 18.5 x 11.7 cm
Weight 24.2 oz / 686.1 g