July 2026 - Written by the HeatSight Optics Team
HeatSight TPM C18-384 54mm Review - The C18-384 54mm points the 384 sensor down a longer barrel of glass: a 54 mm objective at 2.5x base magnification pushes identification to roughly 900 m and detection to 3.6 km - while the tight 4.9° field of view makes it a deliberate, long-look instrument rather than a scanner.
A compact tube-style thermal with a 54 mm manual-focus objective at 2.5x base magnification (1-8x electronic zoom), weighing 580 g. Standard day-optic mounting, IP66 housing, 1000G recoil rating.
The C18 series runs a 384×288 VOx core at 12 μm - the same fine pixel pitch as our 640 scopes, just fewer of them - with ≤40 mK NETD, ≤50 Hz refresh, and the same sharp 1440×1080 OLED display used across the C-series. You get the full feature stack: six palettes, picture-in-picture, hotspot tracking, five menu languages, 16 GB of onboard recording (JPG/MP4), and USB charge/export.
A 384 sensor at 12 μm is no consolation prize: pixel-for-pixel it resolves the same detail as a 640, in a narrower window. For hunting inside 200 yards - which is most hunting - it's the smart-money choice. Power is 2×18350 (1,400 mAh) for 5+ hours; housing is IP66, 1000G recoil rated, -20°C to +60°C.
The 54mm lens narrows the window and stretches the reach, and in open country that trade works. Mine gets used across big fields where heat shows up a long way out and the extra native magnification saves me from living on digital zoom. It scans slower than a 35mm, so I work it from a position rather than on the move. For pasture edges and long fence lines on a 384 budget, this is the configuration I reach for.
12 μm pixel pitch: Same per-pixel detail as our 640 line - many budget 384 scopes still run coarser 17 μm cores.
1440×1080 OLED display: A C-series display on an entry-tier sensor.
Long identification range on a 384 budget: ~900 m ID stretches the sensor further than any other C18 configuration.
A niche configuration done right: maximum reach per 384 dollar for static, long-range observation and shooting. Most hunters are better served by the 35mm; the 54mm is for those who know exactly why they want it. 2-Year Limited Warranty included.
Specifications: 384×288 VOx, 12μm, NETD ≤40mK | 54mm | 2.5x base, 1-8x e-zoom | OLED 1440×1080 | ≤50Hz | 6 palettes, PiP, hot tracking | 16GB, JPG/MP4 | 2×18350, ≥5h | IP66, 1000G | 580 g
The HeatSight Optics TPM C18-384 54mm is available at heatsightoptics.com for $1,900. Check the product page for current stock - this model sells through quickly; contact us to get on the list for the next batch. Questions about which HeatSight scope fits your hunting or property-security setup? Call us at (313) 338-8168 - you'll talk to the people who actually build and flash these units, not a call center.
This review was written by the HeatSight Optics team based on our own design, bench, and field testing of production units. We build these scopes, so consider the source - and consider that we also publish the cons, because we'd rather you buy the right scope than return the wrong one.