The OTS LT 160 3-6x runs a 160×120 core at 17 µm behind a 19 mm lens; the ThOR LTV 320 3-9x runs 320×240 at 12 µm behind 19 mm. The ThOR LTV 320 3-9x has 4.0× the pixels. On the Johnson yardstick they detect a person at 279 m and 396 m and recognize one at 70 m and 99 m; the boxes say 430 m and 1,280 m. The OTS LT 160 3-6x is lighter by 3.1 oz. Approximate prices are ~$799 and ~$1,495.
Estimated range, standing human, clear air
IdentifyRecognizeDetectBox claim
ATN OTS LT 160 3-6x160×120 · 17 µm · 19 mm
43 m identify70 m recognize279 m detectbox says 430 m (human (ATN 'Human Detection Range', 475 yd))
ATN ThOR LTV 320 3-9x320×240 · 12 µm · 19 mm
61 m identify99 m recognize396 m detectbox says 1,280 m (human (ATN product page 1400 yd; ATN manual lists 715))
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.