Trijicon IR-HUNTER 35mm vs Trijicon IR-PATROL IRMO-250
The IR-HUNTER 35mm runs a 640×480 core at 12 µm behind a 35 mm lens; the IR-PATROL IRMO-250 runs 640×480 at 12 µm behind 19 mm. On the Johnson yardstick they detect a person at 729 m and 396 m and recognize one at 182 m and 99 m. The IR-PATROL IRMO-250 is lighter by 14.7 oz. Approximate prices are ~$8,239 and ~$6,895.
Estimated range, standing human, clear air
IdentifyRecognizeDetectBox claim
Trijicon IR-HUNTER 35mm640×480 · 12 µm · 35 mm
112 m identify182 m recognize729 m detect
Trijicon IR-PATROL IRMO-250640×480 · 12 µm · 19 mm
61 m identify99 m recognize396 m detect
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.