Leica Calonox 2 Sight LRF vs Steiner Nighthunter C35 Gen II
The Calonox 2 Sight LRF runs a 640×480 core at 12 µm behind a 42 mm lens; the Nighthunter C35 Gen II runs 640×512 at 12 µm behind 35 mm. The Nighthunter C35 Gen II has 1.1× the pixels. On the Johnson yardstick they detect a person at 875 m and 729 m and recognize one at 219 m and 182 m. The Nighthunter C35 Gen II is lighter by 6.9 oz. Approximate prices are ~$5,899 and ~$3,450.
Estimated range, standing human, clear air
IdentifyRecognizeDetectBox claim
Leica Calonox 2 Sight LRF640×480 · 12 µm · 42 mm
135 m identify219 m recognize875 m detectbox says 2,210 m (1.7 m x 0.5 m subject, Leica 'acquisition' at 2 px (Leica 'detection' 770 m at 6 px))
Steiner Nighthunter C35 Gen II640×512 · 12 µm · 35 mm
112 m identify182 m recognize729 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.