Although the two models share the same compact platform, their detector resolutions and fields of view differ. In practice, the higher-resolution D-C19L provides more image detail, while the 35 mm lens narrows the field for more concentrated long-range observation.

The performance chart also identifies manual focus, electronic zoom, environmental ratings, and physical controls. The structure diagram shows a compact monocular body with a rugged exterior, a large front adjustment control for focus, and a ribbed diopter ring positioned ahead of the eyecup.

Long-range performance is a central advantage of this thermal telescope. According to the product data, the 25 mm lens supports human detection to 2361 meters, while the 35 mm lens extends that listed distance to 3306 meters. Vehicle detection reaches 6250 meters with the 25 mm lens and 8750 meters with the 35 mm configuration.

The integrated rangefinder uses separate 6 mm transmitting and 17 mm receiving apertures. Its listed building measurement range is 10 to 1500 meters. Below 400 meters, the stated accuracy is ±1 meter. Above 400 meters, accuracy is specified as ±0.4%. The D-C18L performance table also identifies a 905 nm laser wavelength.

The outdoor thermal camera offers six palettes for interpreting thermal scenes: White hot, Black hot, Fire hot, Rainbow, Iron red, and Cold color. Hot-point tracking and picture-in-picture viewing add useful observation tools, and electronic magnification includes 1×, 2×, 4×, and 8× settings.

Raised controls are positioned for operation while viewing through the eyepiece. The labeled keys include Power, Camera, Menu, Pseudocolor, Zoom In, and Brightness. The dedicated diopter adjustment supports a listed range of ±5 SD, allowing users to match the eyepiece to their vision before adjusting scene focus.

Two detachable 18350 rechargeable lithium batteries power the device. Each battery has a listed capacity of 1400 mAh, while overall power consumption is rated at no more than 1.8 W. The specified operating endurance is at least five hours, supporting extended observation sessions in the field.

The Type-C connection supports charging and computer access to stored photographs and videos. The D-C18L table lists 16 GB of built-in eMMC storage, with approximately 13.8 GB available after system files. Images are saved as JPG files, while recordings use MP4 format.

For difficult environments, the D-C18L/D-C19L Outdoor Thermographic Telescope carries an IP66 protection grade. Its operating temperature extends from -20°C to +60°C, and the storage range extends from -30°C to +70°C. The housing also has a listed impact rating of up to 1000 G.

• Dimensions: 196.5 × 96 × 66 mm
• Weight: 700 g
• Protection: IP66
• Languages: Simplified Chinese, Traditional Chinese, English, Russian, and German

This outdoor thermal camera is designed for applications that demand observation beyond visible-light limits. Security personnel can scan large perimeters and estimate building distances, wildlife teams can observe heat signatures without conventional illumination, and search personnel can inspect open terrain during darkness or reduced visibility. JPG photography and MP4 recording also let teams preserve thermal evidence and transfer it to a computer.

Overall, the D-C18L/D-C19L Outdoor Thermographic Telescope combines long-range thermal observation, laser measurement, recording, and field-ready controls. The D-C18L offers a practical 384 × 288 detector, while the D-C19L provides 640 × 512 resolution for greater thermal detail. Buyers can select the model and lens combination that best matches their required field of view and observation distance.