Fujinon Stabiscope S1240 12x40mm Gryo Stabilized Roof Prism Binoculars Black 210mm x 200mm x 90mm. Pilot looking out the window of helicopter cockpit and sun shining bright in distance over horizon. The gyro effect created by the flywheel absorbs vibration upto 5deg like that of moving vehicles helicopters and boats and maintains a steady view. Three flat glass discs fanned out on top of each other in a straight line on a dark flat surface. All lenses and the prisms have a high-quality EBC multi-coating increasing light permeability for bright natural color reproduction. White helicopter flying in blue sky with sparse clouds. Specifications for Fujinon Stabiscope S1240 12x40mm Gryo Stabilized Roof Prism Binoculars: Manufacturer: Fujinon Color: Black Magnification: 12 x Objective Lens Diameter: 40 mm Prism System: Roof Eye Relief: 17 mm Exit Pupil: 3.3 mm Field of View Linear: 82 m at 1000 m Optical Coating: Electron Beam Coating Binoculars Focus System: Individual Eyepiece Focus Interpupillary Distance: 59 - 71 mm Close Focus: 28.8 m Diopter Adjustment Range: 5 dpt Water Resistance Level: Waterproof Length: 21 cm Weight: 1.8 g Finish: EBC Multicoating Magnification Type: Fixed Width: 200 mm Features of Fujinon Stabiscope S1240 12x40mm Gryo Stabilized Roof Prism Binoculars The gyro effect created by the flywheel absorbs the vibration up to 5 like that of moving vehicles helicopters and boats and maintains a steady view. All lenses and the prisms have a high-quality EBC multi-coating increasing light permeability for bright natural color reproduction. Strong and corrosion resistant for use in harsh conditions from -20? to +50?. Airtight waterproof structure is filled with dry nitrogen gas to prevent fogging inside. Can be used upside down allowing the binoculars to be held in either hand. Package Contents: Fujinon Stabiscope S1240 12x40mm Gryo Stabilized Roof Prism Binoculars Neck Strap Wristband Dc Regulator Input / Output Cords (For Dc Regulator) 4 AA Batteries Fujinon 16330316: Stabiscope S1240 12x40mm Gryo Stabilized Roof Prism Binoculars Black 210mm x 200mm x 90mm