The AimpointA(R) 3XMag-1 can be used in conjunction with all AimpointA(R) sights for long-range aiming or observation. A variable (-3 to +3) dioptric setting allows this magnifier to be adapted to the individual operator's eye. The 3XMag-1 can also be used as a handheld 3X monocular. Aimpoint magnifiers utilize the red dot in Aimpoint sights as the aiming reticle, eliminating the need for re-zeroing when shifting between non-magnified and magnified aiming. The 3XMag-1 is encased in a shock-absorbing protective rubber cover that also creates an ideal ergonomic grip. Internal optical adjustments make aligning the magnifier and sight quick and easy. Optical specifications Optical magnification: 3x NVD compatible: Yes Field of view (FoV): 7deg Exit pupil: 6.5 mm (0.3 in) Eye relief: 70 mm (2.8 in) Transmission: 75 % (photopic, integral transmission) Dioptric adjustment: 3.0 D Physical specifications Length sight only: 117 mm (4.6 in) Width sight only: 46 mm (1.8 in) Height sight only: 43 mm (1.7 in) Weight sight only (incl battery): 230 grams (8.1 oz) including rubber cover Housing material: Hard-anodized aluminum Housing finish and color: Matte dark grey to black Surface treatment: Hard anodized, matte, with protective rubber armor cover Environmental specifications Temperature range operation: -45degC to +71degC (-49degF to +160degF) Temperature range storage: -45degC to +71degC (-49degF to +160degF) Temperature shock: Operable after a temperature shock between -40C and +55C (-40degF and +131degF) Humidity: Operable during and after Humidity. Limits: RH: 95%, Temp: +20degC to +50degC (+68degF to +122degF), cyclic Submersible: To a depth of 25 m (80 ft.) Shock: Withstands shock. Limits: X-axis: 500 g, 0.7 - 1.1 ms (3 shocks), Y-axis: 40g 4g, 11 1ms (2 shocks in each direction, Z-axis: 40g 4g, 11 1ms (2 shocks in each direction). Vibration: Withstands Vibration. Limits: Vibration, sinusoidal in a frequency range of 10-150 Hz. Frequency: 10-30 Hz, 1.587 mm, Frequency: 30-150 Hz. 5.75 g, 1 octave/min. Direction: X, Y and Z, Time: 30 min/direction. Other information for Environmental Specifications: Salt fog: 5 % NaCl solution at a temperature of 35 degC