Thermal imaging camera KEILER-13 PRO Ceramic (2019)

The second specification in a night vision device’s model number is the front lens diameter. The larger it is, the more light the night vision device collects.

For transfer to a TV device or a grabber.

This allows the device to be mounted onto a standard photographic tripod with a 1/4" camera screw.

The visible field in meters, that can be seen from a distance of 100 meters. This information is often more easily visualised as an angular specification.