Konus Basic 10x25mm Roof Prism Binoculars Black Black. Designed with high quality rubber armoring to absorb shocks and ruby coated optics Specifications for Konus Basic 10x25mm Roof Prism Binoculars: Manufacturer: Konus Color: Black Magnification: 10 x Objective Lens Diameter: 25 mm Prism System: Roof Prism Material: BAK4 Exit Pupil: 2.5 mm Field of View Linear: 300 ft at 1000 yds Weight: 8.12 oz Finish: Black Package Type: Box Magnification Type: Fixed Package Contents: Konus Binoculars 2008 The Konus Binoculars 2008 is a quality addition to the Konus lineup. For more great deals on Binoculars by Konus please browse our Konus Binoculars page.