• Hunters and land managers who need clearer target identification at medium distances
• Wildlife observers and search‑and‑rescue teams wanting an integrated rangefinder without sacrificing field of view
• Users who appreciate high‑resolution imaging but don’t want the weight or narrow FOV of a 50 mm lens

• Extreme long‑range scanning beyond about 1,200 yards – that’s where the 50‑mm model shines
• All‑night surveillance – runtime is still limited to roughly 4.5 hours per battery
• Buyers looking for the lowest price point – the 25‑mm model is more affordable

The 35‑640 sits squarely between the 25‑384 and 50‑640 ReachIRs. It uses a 640×512 sensor for sharper images and retains a wide field of view. Compared with the entry‑level 25‑mm unit, you gain more detail and detection distance at the cost of added price. Compared with the 50‑mm model, you sacrifice a bit of maximum range but benefit from a wider view and lighter weight.

The 35‑640 offers higher resolution than the 25‑384 and a wider field of view than the 50‑640. Detection range (≈1,800 m) sits between the two, providing a balanced option in the ReachIR lineup.

In practice, the 35‑640 provides a noticeably cleaner image than the 384‑resolution model, allowing you to distinguish individual animals at mid‑range. The 2× optical magnification works well for scanning large fields, and digital zoom up to 8× helps you study details without completely sacrificing clarity. The laser rangefinder is accurate to within a yard up to ~1,000 m, making it easy to range targets for ballistic computations.

Battery life mirrors the rest of the ReachIR line, so we always carry a spare 18650. Overall the unit strikes a sweet spot between size, resolution and performance for most handheld applications.

• 640×512 12 µm VOx sensor with <20 mK NETD
• 35 mm f/1.0 germanium lens; 2× optical magnification with 1×/2×/4×/8× digital zoom
• Integrated 1,000‑m laser rangefinder
• 50 Hz refresh rate; 1024×768 OLED display
• 64 GB internal memory for video/audio recording
• Removable 18650 battery delivers ~4.5 h runtime
• Wi‑Fi hotspot for remote viewing and file transfer
• Rugged magnesium alloy housing, IP67 waterproof
• Backed by AGM’s 5‑year transferable warranty

Designed for those who need crisp thermal imagery without sacrificing field of view, the ReachIR LRF 35‑640 pairs a high‑resolution 640×512 thermal core with a 35 mm f/1.0 germanium objective. The resulting 2× optical magnification and 12.5° × 10.0° field of view provide enough zoom to pick out coyotes at 500 yards yet remain wide enough for scanning large pastures or wooded ridges. Advanced image‑processing algorithms and a fast 50 Hz refresh rate make panning and tracking smooth.

The integrated laser rangefinder measures distances to 1,000 m with ±1 m accuracy and is invaluable for estimating holdovers. Internally, 64 GB of memory records hours of video with audio, and a Wi‑Fi hotspot allows you to share footage or live‑stream to the AGM Connect app. Power is supplied via a replaceable 18650 battery for roughly 4.5 hours; spare cells or an external power bank can extend runtime.

With its magnesium‑alloy chassis sealed to IP67, the 35‑640 is built to handle harsh environments and comes with a 5‑year warranty.

• Detector: 12 µm VOx uncooled FPA, 640×512 resolution, NETD <20 mK
• Lens system: 35 mm f/1.0; field of view 12.5° × 10.0°
• Optical magnification: 2× (digital zoom 1–8×)
• Detection range (6‑ft target): ≈1,800 m; laser rangefinder range: 1,000 m
• Display: 0.39‑inch OLED, 1024×768 resolution, 50 Hz
• Memory: 64 GB internal storage for photos and video with audio
• Power: one removable 18650 battery; ≈4.5 h runtime; USB‑C external power
• Dimensions/weight: ~7.3 × 3.4 × 2 in; ~14 oz
• Environmental: IP67 waterproof; operating temp –22 °F to +131 °F
• Warranty: 5 years transferable on the optic and sensor