July 2026 - Written by the HeatSight Optics Team
HeatSight TPM C18-384 35mm LRF Review - The C18-384 35mm LRF is the price-to-capability outlier of our lineup: a laser-rangefinding thermal rifle scope for $999. Rewind a few years and LRF thermals started north of $5,000 - the AGM Varmint LRF was celebrated for bringing one in 'under $5,500.' This scope does the job for under a grand.
A compact tube-style thermal with a 35 mm manual-focus objective at 2x base magnification (1-8x electronic zoom), weighing 700 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 onboard LRF ranges 10 m to 1,500 m, ±1 m inside 400 m. A rangefinder on a 384 scope is an underrated combination: the sensor tells you something's there, the LRF tells you exactly how far, and together they cover the practical hunting envelope at a fraction of flagship money.
Ranging in the field is where this scope stops being a budget option and starts being unfair. Heat on a field edge could be 180 yards or 320 in the dark, and your eyes cannot tell you which. The button can. Readings come back instantly and repeat within a couple meters on things I can verify, and having the number changes the shot from a guess to a decision.
Between hunts, mine does property duty, and a 384 with ranging covers that job completely: checking heat in the tree line, confirming the far shape is a deer and not a trespasser, knowing how far away it is standing. On hogs inside 200, which is most of the hog hunting anyone does, the C18 image is all the scope you need, and the price difference against a 640 LRF buys a lot of ammunition.
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.
A rangefinding thermal under $1,000: Nothing else needs to be said - this was flagship-only territory very recently.
If your budget is $1,000 and you hunt real distances, this is the most scope for the money we sell. Outgrow the 384 sensor later and the C19-640 35mm LRF is a familiar upgrade - same platform, same controls, same batteries. 2-Year Limited Warranty included.
Specifications: 384×288 VOx, 12μm, NETD ≤40mK | 35mm | 2x base, 1-8x e-zoom | LRF 10-1,500m | OLED 1440×1080 | ≤50Hz | 6 palettes, PiP, hot tracking | 16GB, JPG/MP4 | 2×18350, ≥5h | IP66, 1000G | 700 g
The HeatSight Optics TPM C18-384 35mm LRF is available at heatsightoptics.com for $999 (regularly $1,299). It's in stock and ships from our Michigan facility. 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.