Bering Optics BEAST-R product image

Bering Optics BEAST-R

The BEAST-R is a thermal weapon sight made by Bering Optics.


The BEAST-R features a crisp 50mm f/1.2 objective lens focusing the available thermal radiation. The field of view on this thermal scope is 7.4 by 5.6 degrees. It features a 4 times digital zoom to enlarge your subject. The eye relief distance is measured at 50mm.

Behind the lens of the BEAST-R you can find the (uncooled, 17 micrometer) 336 x 256 pixels thermal core refreshing the image at 30Hz. The thermal contrast (NETD) of this thermal scope is <50mK.

The physical dimensions of this thermal scope read 250 x 70 x 75mm (lwh) weighing in at 654 grams. This device is rated IPX67. It handles dust, shocks and water (splashes). It's rated for operating in temperatures between -40°C and 50°C.

The BEAST-R is built to be used in hunting adventures and police operations.



  • FLIR High Resolution Core
  • SVGA AMOLED Display
  • Automatic/manual shutter image calibration
  • Quick-Release Weaver Mount
  • Digital zoom: 2X, 4X
  • Precise internal lens focusing mechanism


Lens50 mm
Diopter adjustment-4 +3
Eye relief distance50 mm
Optical zoom2 x
Digital zoom4 x
FOV (h/v)7.4 ° / 5.6 °
Thermal typeUncooled
Sensor resolution (h/v)336 pixels / 256 pixels
Pixel pitch17 µm
Sensitivity50 mK
Display resolution (h/v)800 pixels / 600 pixels
Refresh rate30 Hz
Output screen colorFull color
Startup time5 seconds
Reticle detailsMil-Dot or crosshair with 5 color options
Rail detailsWeaver
Package contentsQuick release Weaver Mount, Front lens flip-up protective cap, Tactical hard case, Batteries, Lens Cleaning Cloth, Instruction manual, Video cable, Rubber eye guard
Dimensions (l/w/h)250 mm / 70 mm / 75 mm
Weight654 g
Number of batteries2
Battery life4 hours
Operating temperature-40 °C / 50 °C
Environmental ratingIPX67
Law enforcement
Search & rescue
Fire fighting

DRI Ranges

DRI stands for Detection, Recognition and Identification and is based on the widely used Johnson's criteria.

  • Detection Detect if an object is present
  • Recognition See what type of object it is (i.e. person, vehicle, airplane)
  • Identification For example see if someone is a friend or foe
Detection Recognition Identification
Rabbit 529 meters 132 meters 66 meters
Person 1862 meters 465 meters 232 meters
Vehicle 4509 meters 1127 meters 563 meters

Please note that these values are calculated, always consult the manufacturer for official range numbers.