The ACE H50R runs a 640×512 core at 12 µm behind a 50 mm lens; the Thermion 2 XP50 Pro runs 640×480 at 17 µm behind 50 mm. The ACE H50R has 1.1× the pixels. The Thermion 2 XP50 Pro is lighter by 7.8 oz. Approximate prices are ~$4,599 and ~$4,500.
How far you can see a person
Make out detailTell what it isSpot itMaker’s claim
Nocpix ACE H50R640×512 · 12 µm · 50 mm
160 m make out detail260 m tell what it is1,042 m spot itmaker claims 2,610 m
Pulsar Thermion 2 XP50 Pro640×480 · 17 µm · 50 mm
113 m make out detail184 m tell what it is735 m spot itmaker claims 1,800 m
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Calculated from the sensor's pixel pitch and the lens focal length, for clear air.