Konus Silver Bridge Ruby Coated Binoculars 8x21 168361. These Binoculars from the craftsmen at Konus feature a ruby coated lens that allows for a field of view at 1000m/1000yds. With a central focus knob the Konus Ruby Coated Binoculars are easy to adjust on the field without losing quality. Affordable and efficient with Konus Compact 8x21 Millimeter Binoculars you don't have to sacrifice quality for convenience. Specifications for Konus Compact 8x21 Binoculars w/ Ruby Coating: Manufacturer: Konus Color: Black Magnification: 8 x Objective Lens Diameter: 21 mm Prism System: Roof Binoculars Focus System: Center Focus Package Type: Box Magnification Type: Fixed Features of Konus Compact 8x21mm Roof Prism Binoculars Center Focus KO-BI-2007: Central focus Ruby Coated Optics Rubber Covering Field of view at 1000m/1000yds: 122m - 366ft. Exit pupil diameter: 2.7mm. Package Contents: Konus 8x21mm Compact Basic Binoculars w/Ruby Coating KO-BI-2007 Konus 168361: Silver Bridge Ruby Coated Binoculars 8x21