July 2026 - Written by the HeatSight Optics Team
HeatSight TPM C18-384 35mm Review - The C18-384 35mm is the straightforward workhorse of the C18 line: a 12 μm 384 core, 35 mm objective, 2x base magnification, and the full C-series feature stack with no rangefinder and no fuss. It's the scope for the hunter whose shots live inside 200 yards and who'd rather spend the difference on ammunition.
A compact tube-style thermal with a 35 mm manual-focus objective at 2x base magnification (1-8x electronic zoom). 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.
This scope splits its life between the rifle and the windowsill. Hunting, it does the classic 384 job: hogs and coyotes inside 200 yards, clean enough contrast to count animals and pick the shot. On property watch, it answers the 2 a.m. question of what just set the dogs off without me stepping outside. Simple controls, batteries that behave, zero that stays put. Not the flashiest unit in the lineup, just the one that gets used the most.
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.
Proven platform simplicity: Fewer systems drawing power, nothing you don't use.
Honest tools do honest work. If you want ranging with the same sensor, the C18-384 35mm LRF at its current sale price is the obvious cross-shop. 2-Year Limited Warranty included.
Specifications: 384×288 VOx, 12μm, NETD ≤40mK | 35mm | 2x base, 1-8x e-zoom | OLED 1440×1080 | ≤50Hz | 6 palettes, PiP, hot tracking | 16GB, JPG/MP4 | 2×18350, ≥5h | IP66, 1000G
The HeatSight Optics TPM C18-384 35mm is available at heatsightoptics.com for $899 (regularly $1,199). 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.