Guide TD650S

• 640×512 High-Sensitivity Detector (15 mK NETD): The 12 μm pixel pitch detector delivers a low Noise Equivalent Temperature Difference of 15 mK, producing sharp, low-noise thermal images with fine detail even in complete darkness.
• 50 mm, F1.0 Lens for Long-Range Detection: The largest objective lens in the TD Gen3 lineup extends the detection range to 2600 m / 2800 yd, useful for glassing open fields, tree lines, or ridgelines at long distance.
• Ambidextrous, One-Handed Operation: The symmetrical housing and ergonomically placed controls allow comfortable use with either hand, while the mini focusing roller lets the user fine-tune focus with a single finger without breaking observation.
• 0.49" AMOLED Display (1440×1080): The enlarged, high-resolution display renders more detail and contrast than earlier-generation screens, making it easier to identify targets during long observation sessions.
• 10-Hour Runtime on a Replaceable 18650 Battery: The battery can be swapped blindly in the dark, without needing to check polarity, keeping the monocular running through a full day of glassing or observation.

ABOUT THE TD GEN3 SERIES

The TD Gen3 Series is Guide's current generation of handheld thermal imaging monoculars, designed as a compact, easy-to-carry option for hunters, outdoor enthusiasts, and field observers. The series spans several models, from entry-level detectors up to high-sensitivity 640×512 sensors, paired with 35 mm or 50 mm lens options to suit different detection-range requirements.

Every model in the series shares the same core design: a 12 μm uncooled VOx infrared detector, a 0.49" AMOLED display with 1440×1080 resolution, and a symmetrical, ambidextrous housing that supports genuine one-handed use. A mini focusing roller allows fast, precise focus adjustment with a single finger, while a replaceable 18650 battery provides roughly 10 hours of continuous runtime and can be installed in the dark without needing to identify the terminals.

Connectivity across the series is built around dual-band Wi-Fi (2.4 GHz/5 GHz) and Bluetooth, allowing users to pair the device with a companion app for image transfer and remote control. Smart recording with audio, combined with up to 64 GB of internal storage, lets users document observations without carrying separate recording equipment. An IP67-rated housing and an operating range of -20°C to 50°C keep the series usable across a wide range of seasonal and climate conditions, while seven selectable color palettes (White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, and Sepia) give users flexibility in adapting the thermal image to different backgrounds and lighting conditions.

ABOUT THE MODEL (GUIDE TD650S)

The Guide TD650S is the top-of-line model in the TD Gen3 lineup, pairing the series' 640×512 uncooled VOx infrared detector with a 50 mm, F1.0 objective lens — the largest lens offered in the series. This combination pushes the detection range to 2600 m / 2800 yd, the longest of any TD Gen3 model, at the cost of a larger and heavier housing than the compact 35 mm-lens models.

The 50 mm lens narrows the field of view to 8.8° × 6.6° (15×12 m at 100 m) and provides a 2.91x–23.28x magnification range, which suits long-range glassing of open terrain, agricultural fields, or distant ridgelines where identifying a target further away matters more than a wide scanning angle. Manual focus allows precise adjustment as the target distance changes.

Images are shown on a 0.49" AMOLED display with 1440×1080 resolution and a 20 mm eye relief, with seven selectable color palettes (White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, and Sepia). Photo and video capture with synchronized audio is supported, backed by 64 GB of internal storage, and dual-band Wi-Fi (2.4 GHz/5 GHz) connects the device to the companion app, while a built-in microphone and Bluetooth support additional connectivity.

Weighing 461 g and measuring 189.5×67.5×88 mm, the TD650S is noticeably larger than the compact TD435S and TD635S, reflecting its larger objective lens. Power comes from a single, replaceable 18650 battery, providing up to 10 hours of operating time, while the IP67-rated housing and an operating range of -20°C to 50°C make the TD650S a dependable choice for hunters and outdoor users who prioritize maximum detection range over compact size.

ABOUT GUIDE

Guide (Guide Sensmart Tech Co.) is a Chinese manufacturer specializing in infrared and thermal imaging technology, operating as a subsidiary of Wuhan Guide Infrared Co. Founded in 2016, the company focuses on the design and production of commercial infrared sensors and thermal imaging devices. More information about the manufacturer is available on the Guide brand page.

Guide's product range spans thermal monoculars, thermal binoculars, digital night vision devices, riflescopes, and thermal clip-on attachments developed for hunting, outdoor observation, search and rescue, and security applications. The company applies its own infrared detector and imaging processing technology across its product lines, aiming to make thermal imaging accessible to a broad range of outdoor and professional users.

MAIN FEATURES

• Core Technology: ApexVision S1 system architecture (ApexCore S1 detector + Platform Nexus 1.0 + Algorithm Hyper-Light 2.0)
• Sensor Type: Uncooled VOx Infrared Detector, 8–14 μm
• Resolution: 640×512 px
• Pixel Pitch: 12 μm
• NETD: 15 mK
• Frame Rate: 50 Hz
• Objective Lens: 50 mm, F1.0
• Magnification: 2.91x–23.28x
• Field of View: 8.8° × 6.6°
• Field of View at 100 m: 15 × 12 m
• Detection Range: 2600 m / 2800 yd
• Focus: Manual
• Display: 0.49" AMOLED, 1440×1080 px
• Color Palettes: White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia
• Eye Relief: 20 mm
• Diopter Adjustment: -6 to +6
• Wi-Fi: 2.4 GHz / 5 GHz
• Interface: USB-C
• Additional Connectivity: Microphone, Bluetooth
• Recording: Photo/Video with audio
• Internal Storage: 64 GB
• Battery: Single, replaceable 18650 battery, up to 10 hours
• Operating Temperature: -20°C to 50°C
• Waterproof Rating: IP67
• Weight: 461 g
• Dimensions: 189.5 × 67.5 × 88 mm

WARRANTY

The Guide TD650S thermal imaging monocular is covered by a 2-year warranty.

IN THE BOX

• Guide TD650S Thermal Imaging Monocular
• Hand Strap
• Neck Strap
• Carry Bag
• Lint-Free Cloth
• Battery Charger
• 18650 Battery ×2
• 5V 2A Adapter
• USB-A to USB-C Cable
• Quick Start Guide
• Warranty Card