TSO Turbine 10x42 Roof Binocular Black. Ergonomic design and slip-resistance rubber armor reduces hand fatigue during extended viewing sessions. Specifications for TSO Turbine 10x42mm Roof Prism Binocular: Manufacturer: TSO Color: Black Magnification: 10 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BK-7 Eye Relief: 15.5 mm Exit Pupil: 4.2 in Field of View Linear: 294 ft at 1000 yds Field of View Angle: 5.6 degrees Binoculars Focus System: Manually Adjustable Interpupillary Distance: 57 - 72 mm Close Focus: 26 ft Weight: 19 oz Fabric/Material: Rubber Width: 5.1 in Package Contents: TSO Turbine 10x42 Roof Binocular TSO T112001: Turbine 10x42 Roof Binocular Black