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Range Calculator

Estimate how far you can detect, recognize, and identify a target with any thermal scope. Based on the Johnson criteria with a standard 12μm sensor pixel pitch.

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Target

Sensor Resolution

Objective Lens: 35mm

NETD (sensitivity): ≤40 mK

Lower NETD = better image clarity in fog, rain, and low-temperature-delta conditions. Does not change geometric range but improves practical image quality at distance.

Estimated Ranges — Hog / Wild Pig

Field of view

7.5°

Angular res.

0.34 mrad

Sensor

384 px wide

DetectionCan see something is there

778m(851 yd)

RecognitionCan tell what class of target

292m(319 yd)

IdentificationCan see fine detail / ID the target

146m(160 yd)

Estimates based on Johnson criteria with 12μm pixel pitch and ideal atmospheric conditions. Sensor resolution sets the field of view and image detail — the ranges are governed by lens focal length and pixel pitch. Actual field performance varies with atmospheric conditions, target temperature contrast, and operator experience. Use as a comparison tool, not a guarantee of field performance.