Five of the Best Thermal Optics

The HikMicro Lynx 3.0 LH25 builds on the compact LH15 but adds greater range and sensitivity. It is designed for open-country scanning.

It uses a 384×288 VOx detector with an impressive NETD below 15mK. As a result, thermal contrast remains excellent, even with subtle heat signatures. The 25mm f/1.0 lens delivers detection ranges up to 1,200m. This makes it ideal for farmland, woodland edges and wider landscapes.

Image Pro 3.0 and Zoom Pro algorithms sharpen detail. Meanwhile, the HSIS shutterless system ensures smooth viewing without frequent freezes. Weighing just 328.5g with battery, it is highly portable. It is also IP67-rated for tough UK conditions. Battery life reaches around 4.5 hours using a standard 18650 cell. The high-resolution 1920×1080 AMOLED display is crisp and easy on the eye.

This is an excellent choice for shooters who prioritise lightweight performance and image quality over integrated rangefinding.

RRP from £1,049.99

The Pulsar Oryx LRF XG35 is a compact thermal monocular with a built-in laser rangefinder. It is optimised for long sessions in the field. Its rugged magnesium-alloy housing is IP67-rated. Inside, a 640×480, 12µm sensor delivers strong performance with sNETD under 20mK.

The 35mm f/1.0 lens offers detection ranges of up to 1,800m. This suits estate work and open-ground scanning. The integrated laser rangefinder measures accurately to 1,500m. In addition, digital image stabilisation reduces shake while walking or glassing.

A dual-battery system provides up to 12 hours of use. This is a major advantage during long nights out. Wi-Fi, video and audio recording are included. Media is stored on 64GB internal memory and managed via the Stream Vision 2 app.

Overall, the Oryx LRF XG35 combines clarity, ranging accuracy and durability in a compact package.

RRP £2,189

The ThermTec Wild 650L blends performance, ergonomics and value. It is designed specifically for hunters and stalkers.

A 640×512 sensor with NETD ≤18mK delivers clear images in difficult conditions. Detection remains reliable in damp or cold weather. Its built-in laser rangefinder measures targets to around 1,000m. AI distance measurement further improves real-world usability.

Forest and target outline modes help tailor the image to terrain. As a result, spotting quarry becomes faster and easier. The 50mm f/0.9 lens captures more thermal radiation than standard optics. Digital zoom from 1–4x adds flexibility. A replaceable 18650 battery provides up to eight hours of use. The IP67-rated body is well suited to British weather.

For shooters seeking high performance without a premium price tag, the Wild 650L stands out.

RRP £2,199.95

The Swarovski tM35+ thermal add-on brings premium design and flexibility. It can be used handheld or as a clip-on.

It features a 640×512 sensor with 12µm pixels and dual colour palettes. White Hot and Black Hot adapt easily to conditions. Swarolight technology powers the unit on or off based on orientation. This helps conserve battery during use in the field.

Automatic brightness control ensures smooth transitions between environments. Viewing remains comfortable and consistent. The removable RB TM35 battery offers around 6.5 hours of runtime. Weight is kept to a manageable 495g. As a clip-on, it integrates seamlessly with compatible Swarovski riflescopes. Re-zeroing is minimal when switching from day optics.

For shooters who value premium optics and brand cohesion, the tM35+ is a refined solution.

RRP from £3,240

The Nocpix Lumi H35R is a compact thermal monocular that delivers strong performance for its size.

It uses a 640×512, 12µm sensor with NETD ≤18mK. Image clarity is impressive across varied conditions. An integrated laser rangefinder measures distances up to 800m. This is ideal for stalking and real-world distance estimation.

The 35mm f/0.9 lens improves sensitivity by capturing more thermal radiation. Smaller heat sources are easier to identify. Magnification ranges from 2.5x to 20x. This offers flexibility for scanning or detailed observation. The AMOLED display is crisp and colour-rich. Electronic image stabilisation helps reduce fatigue during long sessions.

With IP67 protection, 32GB storage and silent controls, it is a capable all-rounder for UK fieldsports.

RRP £1,699