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The F4949 series night vision goggles are the standard night vision support system used by the US Air Force and Navy.
The PHOTONIS third-generation image intensifier tube provides high resolution and amplification of the photo signal in the near-infrared region of the spectrum and exceptional reliability.
Spectral characteristic: located in the visible part of the spectrum up to 0.90 μm (IR)
Field of view: 40 ° (nominal)
Magnification factor: single
Resolution: 1.3 cycles / mrad, minimum (1.36 is typical)
Luminance Gain: 5000 ft-lambert / ft-lambert (minimum value)
Adjustment: convergence <1 °, divergence / divergence <0.3 °
Interpupillary distance adjustment: independent, from 51 to 72 mm
Vertical adjustment: in the range of 25 mm
Longitudinal adjustment: in the range of 27 mm
Tilt adjustment: in the range of 10 °
Lens type: EFL 27mm f / 1.23, T / 1.35
Lens filter classes: available classes A, B, C, UK 645
Lens focal length: 41 cm to infinity
Lens eyepiece: EFL 27mm
The exit pupil of the optical system/distance between eye and optical device:
on the axis - 14 mm at 25 mm distance
full field - 6 mm at a distance of 25 mm
Eyepiece adjustment: +2.0 to minus 6.0 diopters
Flip-up / Flip-down: release button
Automatic separation (stall): 11 to 15 g
Battery type: 4 AA alkaline cells
Operating temperature range: from minus 32 to 52 ° C
Package as pictured