burri, a leading company in the production of optical systems, presents its products on the market thermal viewers. The range includes three different types, all available in two versions with 35mm or 50mm lens, manual focus, zoom and 400 × 300 resolution. The first model is the BTS, a thermal scope to be mounted on the rifle in place of the scope.
The second is the model clip on, a thermal system to be applied frontally to the optics already present on the rifle, allows you to pass from day to night by simply applying the viewer via a ring without correcting the calibration of the weapon. The third model is the BTH, the monocular viewer to be used at night in place of the binoculars, which I tested and used in this test.
It immediately presents itself as a compact and easy to use tool, in the package, in addition to USB cables for charging, HDMI to connect a monitor and the instruction booklet, we find a practical neoprene case, very protective and useful for carrying in the backpack . The viewer is rechargeable via the USB-C cable and the battery life is about 4,30 hours, test done personally, if more time is needed, you can always connect an external Powerbank.
For the visualization we can choose among 5 color palettes the one we prefer, "Black", "White", "Iron", "Red Hot" and "Blue". Among the main functions I point out the possibility of taking photos and recording videos; the PIP, “Picture in Picture” which consists of a box on the display with the central area enlarged by 200%; Zoom up to 4x; the Stadiometric Bars to determine the distance of the observed animal; “The Hot track”, a cross that is automatically positioned in the hottest point of the display; the "WiFi", with this function it is possible to interface a smartphone and see the same image on the display, also from the phone it will be possible to access the viewer menu to make the various adjustments, again from the phone app it is possible to record videos and take pictures , as well as download what has been recorded directly in the viewer memory.
The high speed of the sensor allows the tracking of moving animals while remaining in focus, the difference between the 35 and the 50 lens consists in a better detection of heat, especially over long distances and in a faster focusing.
The viewer has proved to be particularly useful even during the day, it helps in identifying animals in the woods and killed animals, it immediately highlights the heat emitted by a body, very different from that generated by plants. Further technical information can be found on the Burris website.