The BTC35 v3 runs a 400×300 core at 12 µm behind a 35 mm lens; the BTH35 v3 runs 400×300 at 12 µm behind 35 mm. On the Johnson yardstick they detect a person at 729 m and 729 m and recognize one at 182 m and 182 m; the boxes say 1,000 m and 1,000 m. The BTC35 v3 is lighter by 5.8 oz. Approximate prices are ~$3,000 and ~$2,160.
Estimated range, standing human, clear air
IdentifyRecognizeDetectBox claim
Burris BTC35 v3400×300 · 12 µm · 35 mm
112 m identify182 m recognize729 m detectbox says 1,000 m (deer)
Burris BTH35 v3400×300 · 12 µm · 35 mm
112 m identify182 m recognize729 m detectbox says 1,000 m (deer)
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.