Night Optics Iris, Gen 3 Gated, Dual-Tube Night Vision Binocular, 3.6X


Please select an option.

The D-221 (Generation 2+) or D-321 (Generation 3) high performance, modular, hand-held night vision binocular uses dual image intensifier tubes to provide crisp, clear images in the darkest conditions.

The binocular includes advanced features of automatic brightness and gain control. Each image tube operates independently, providing excellent redundancy. The unique patented design eliminates any need for interpupillary adjustment and reduces the size and weight of the unit. An integrated near IR illuminator enhances the ability to operate the goggle in confined spaces.

The powerful 3.6x D-221B/321B Binocular converts easily into the D-221G/321G 1x night vision Goggle with a 40° wide field of view by simple replacement of front objective lenses. The goggle attaches quickly to an ambidextrous headgear assembly for hands-free use.

The D-221/321 is the most affordable stereoscopic night vision goggle/binocular currently available on the market.


  • D-321B Night Vision Binocular (helmet & headgear not included)
  • 3.6x 80mm f1.6 objective lenses
  • Hard case
  • 1 3v CR123 battery
  • Operating Manual

D-321B | Gen 3 Autogated US Dual-Tube Binocular

Night Optics Part # NB-321-3G
Resolution 64-72 lp/mm
Power Supply Gated
Film Type Thin
Magnification 3.6x or (1x optional)
Lens System 80 mm f1.6
FOV 15°
FOV @ 1000 yards 790 ft
FOV @ 1000 meters 263 m
Range of Focus 10 ft to ∞
25 cm to ∞
Detection Range 1230 ft
375 m
Recognition Range 984 ft
300 m
Diopter Adjustment +4 to -4
Weather Resistant Yes
Camera/Camcorder Adaptable No
IR Illuminator Yes
Battery Type/Life 3v CR123 / 30 hours
Dimensions 7" x 5" x 2.5"
178 mm x 127 mm x 64 mm
Weight 35 oz
992 g
Operating Temperature -4°F to 113°F
-20°C to +45°C
Warranty 2 Years