400M Infrared Digital Night Vision Goggles Recorder Binoculars Device 7×31 Zoom
400M Infrared Digital Night Vision Goggles Recorder Binoculars Device 7×31 Zoom. (1)Magnification power: 3.5×31(MAX 7x)? (2)Digital Zoom: 2 steps magnification, Max 2x? (3)Angle Of View: 9°? (4)Objective Aperture: 31mm? (5)Exit Pupil Distance: 30mm? (6)F# for Objective lens: 1.2? (7)Viewing Distance in Day time: 3m?? (8)Viewing Distance in Darkness: up to 400m(monochrome)? (9)Eyepiece magnification: 2x? (10)Video… Read more 400M Infrared Digital Night Vision Goggles Recorder Binoculars Device 7×31 Zoom