The Bolt TH50C V2 runs a 640×512 core at 12 µm behind a 50 mm lens; the HALO-LR runs 640×480 at 12 µm behind 50 mm. The Bolt TH50C V2 has 1.1× the pixels. On the Johnson yardstick they detect a person at 1,042 m and 1,042 m and recognize one at 260 m and 260 m; the boxes say 2,190 m and 1,850 m. The HALO-LR is lighter by 5.0 oz. Approximate prices are ~$5,499 and ~$7,695.
Estimated range, standing human, clear air
IdentifyRecognizeDetectBox claim
iRayUSA Bolt TH50C V2640×512 · 12 µm · 50 mm
160 m identify260 m recognize1,042 m detectbox says 2,190 m (unspecified)
N-Vision HALO-LR640×480 · 12 µm · 50 mm
160 m identify260 m recognize1,042 m detectbox says 1,850 m (man-sized target)
501002005001k2k5k m
Estimated from pixel pitch and lens focal length using the Johnson criteria (2, 8 and 13 pixels across a 0.5 m human critical dimension), clear air, 50 % probability. A model of the optics, not a measurement — real range depends on temperature contrast, humidity and the animal.