Night Optics USA Observer 320 (50mm) product image

Night Optics USA Observer 320 (50mm)

The OBSERVER 320 (50MM) is a thermal monocular made by Night Optics USA and is part of the Observer 320 series.


The Observer 320 (50mm) comes equipped with a clear 50mm lens to capture thermal signatures. The FOV on this thermal monocular measures 9 x 6 degrees. It comes with a 2x digital zoom to get additional details.

Inside the housing of the Observer 320 (50mm) you'll find the (uncooled, 25µm) 384 by 288 pixel thermal sensor with a refresh rate of 60Hz. It's operating between the 8µm - 14µm infrared wavelengths.

The measurements of this thermal monocular are 182 x 97 x 68mm (l/w/h) and weighs 470g. It's protected against dust and shocks. It handles temperatures between -20°C and 50°C.

The Observer 320 (50mm) is built for surveillance, hunting trips, law enforcement (police, border patrol etc.) and SAR (Search and Rescue) operations.


  • 50mm High Grade Germanium Optics
  • Works Day & Night
  • Image & Video Capture
  • Image & Video Outputs to 320x240
  • Real time Object Tracking
  • SD Card Storage
  • 2x Digital Zoom
  • USB & Video Out
  • Battery or External Power
  • 9 Selectable Color Palette Options
  • 3 Selectable Crosshair Options
Lens50 mm
Optical zoom1 x
Digital zoom2 x
FOV (h/v)9 ° / 6 °
Focus range5m to infinity
Thermal typeUncooled
Sensor resolution (h/v)384 pixels / 288 pixels
Pixel pitch25 µm
Spectral range8 µm / 14 µm
Display resolution (h/v)640 pixels / 480 pixels
Refresh rate60 Hz
Image polarityBlack Hot / White Hot / Multi-color
Output screen colorFull color
Video formatsNTSC & PAL
Package contentsObserver 320 Thermal Camera, Interface Cable (USB; Power; Video), (1) Set of Rechargeable Batteries & Charger, 12v DC Car Power Adaptor, External Power Adaptor 4gb SD Card, Lens Cover, Lens Cloth Hand Strap, Carrying Case w/ Shoulder Strap, Operator Manual
Dimensions (l/w/h)182 mm / 97 mm / 68 mm
Weight470 g
Number of batteries4
Battery life3 hours
Law enforcement
Search & rescue
Fire fighting
Operating temperature-20 °C / 50 °C


Night Optics Observer 320 (50mm)


Part of Observer 320 series