Nikon Monarch HG 8x30mm Roof Prism Binoculars Rubber Black. First of all these Binoculars by Athlon Optics feature magnesium alloy bodies that are lightweight yet durable and these Athlon Optics Monarch High Grade 8x30mm Binoculars feature a locking diopter that ensures your field-of-view stays constant and accurate after lots of use. Athlon Optics also built these binoculars with extra-low dispersion (ED) glass that greatly reduces chromatic aberration a huge boon when you're trying to observe the night sky or focus in on a blood relative. Also the long eye relief is remarkably comfortable for users with glasses and the Turn & Slide eyecups let you seamlessly adjust the binocular for use with or without glasses. Grab these waterproof 8x30mm High Grade Monarch HG Binoculars to get the crispest view of your surroundings. Specifications for Nikon Monarch HG 8x30mm Roof Prism Binocular: Manufacturer: Nikon Color: Black Magnification: 8 x Objective Lens Diameter: 30 mm Prism System: Roof Prism Material: BAK-4 Eye Relief: 16.2 mm Exit Pupil: 3.8 mm Field of View Angle: 8.3 degrees Binoculars Focus System: Center Focus Close Focus: 6.6 ft Length: 4.7 in Weight: 15.9 oz Finish: Rubber Magnification Type: Fixed Lens Material: ED Glass Features of Nikon Monarch HG 8x30 Binocular: SPECIFICATIONS MODEL MONARCH HG 8x30 MONARCH HG 10x30 MAGNIFICATION ( x ) 8 10 OBJECTIVE DIAMETER (MM) 30 30 ANGULAR FIELD OF VIEW (REAL/DEGREE) 8.3 6.9 ANGULAR FIELD OF VIEW (ANGULAR/DEGREE) 60.3 62.2 FIELD OF VIEW AT 1000 YDS (FT) 435 362 EXIT PUPIL (MM) 3.8 3.0 RELATIVE BRIGHTNESS 14.4 9.0 EYE RELIEF (MM) 16.2 15.2 CLOSE FOCUSING DISTANCE (FT) 6.6 6.6 LENGTH (IN.) 4.7 4.7 WIDTH (IN.) 5.0 5.0 DEPTH (IN.) 1.9 1.9 WEIGHT (OZ.) 15.9 15.9 INTERPUPILLARY DISTANCE ADJUSTMENT (MM/IN.) 56-47/2.2-2.9 56-47/2.2-2.9 PRISM TYPE ROOF ROOF Included Accessories: Binocular made in Japan Neoprene neck strap for increased comfort and reduced neck strain Semi-hard case protects binocular during travel or storage Includes both Integral flip-down objective lens covers and rubber trim rings without covers Package Contents: Nikon Monarch HG 8x30 Binocular Nikon 16575: Monarch HG 8x30 Binocular Black