The thermal clip-on market keeps evolving, and GUIDE has brought out the updated TB650P-2. Designed to be used both as a clip-on in front of your day scope or as a handheld monocular with the Rusan eyepiece, it’s a versatile solution for hunters who want one device for multiple roles. After several hunts, here’s our detailed review.
First Impressions
The TB650P-2 feels solid but not heavy. The compact body and well-placed buttons make it easy to use in the field. A major plus is that it runs on standard 18650 batteries – affordable and easy to replace. With the Smartclip DS adapter, mounting is fast and secure, and with the Rusan eyepiece it quickly becomes a handheld scanner.
Image Quality & Calibration
Compared to the older TB650P, the image is sharper with improved NETD sensitivity. Animals stand out clearly at night, even in humid weather. During the day, background details can sometimes fade, but with proper contrast settings it remains usable.
One advertised feature is “True Shutterless” calibration. In practice, the unit still performs short shutter corrections with a brief image freeze. It’s quick and not disruptive, but worth noting.
What’s New Compared to TB650P
The 2.0 version brings a cleaner image, faster and more accurate rangefinder, and a simplified menu. The quick menu gives hunters fast access to color palettes, Wi-Fi, AI tracking, and range settings. The full menu handles zeroing, image adjustments, and recording. Buttons and housing also feel more user-friendly than before.
Rangefinder in Use
The built-in rangefinder is a real advantage in night hunting. With single or continuous ranging modes, it gives instant distance readings without carrying extra gear. You can adjust cursor color to match your preferred palette. In our experience, it’s faster and more precise than in the older version.
Battery & Durability
Running on standard 18650 batteries, the TB650P-2 offers around five hours per cell. With spares, a full night hunt is covered. The housing is waterproof, dustproof, and recoil-proof, holding zero even on a .300 WSM. It’s clearly built for tough field conditions.
Zeroing & Alignment
As a clip-on, you align the thermal image with your day scope’s reticle through the zeroing menu. Using the one-shot method, alignment is quick and repeatable, provided the adapter is solid. Once set, zero stays consistent even after removing and remounting the device.
Hunting Performance
In real hunts, the TB650P-2 shows its strength in flexibility. Mounted as a clip-on, it’s reliable for shots at night; with the eyepiece, it serves as a scanning monocular. Warm bodies like deer and boar stand out clearly, and the integrated rangefinder adds confidence in shot placement.
Pros & Cons
Pros:
- Sharper image than previous model
- Fast, accurate built-in rangefinder
- Works as both clip-on and monocular
- Uses standard 18650 batteries
- Solid, weatherproof build
Cons:
- Premium price
- Smaller image quality jump than expected
- Still does shutter calibration freezes
- Requires quality adapter (extra cost)
Conclusion
The GUIDE TB650P-2 is a practical, reliable thermal clip-on that has been improved in key areas: sharper image, better sensitivity, faster rangefinder, and easier menus. It may not revolutionize thermal imaging, but it polishes an already solid device. For hunters wanting flexibility and dependability in one unit, it’s a strong choice.
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