Is 640 × 512 always better than 384 × 288?

A 640 × 512 detector provides more native thermal pixels than a 384 × 288 detector, but that does not automatically make every 640 × 512 product better for every use. Lens design, field of view, NETD, focus, processing, size, power, weight, and price also matter.

Does lower NETD always mean better image quality?

No. A lower NETD indicates greater thermal sensitivity under the stated test conditions, but image quality also depends on the detector, lens, focus, processing, display, environment, and subject/background temperature difference.

Is a longer focal length always better for long-range observation?

No. A longer focal length generally provides greater image scale and a narrower field of view for the same detector format. Whether that is useful depends on observation distance, terrain, target size, and how much surrounding context the user needs.

Does digital zoom increase thermal resolution?

No. Digital zoom enlarges information already captured by the detector. It can make a subject appear larger on the display but does not create additional native thermal pixels.

Does IP67 mean a thermal scope can be submerged indefinitely?

No. An IP rating applies to defined test conditions. Users should follow the exact water-exposure limits and operating instructions specified for the product.

What should I verify before buying a high-end thermal scope?

Confirm the exact detector, pixel pitch, NETD, lens, field of view, magnification, focus system, refresh rate, display, LRF capability, software functions, battery system, dimensions, weight, environmental ratings, shock specification, warranty, and support terms for the exact model.

What Defines a High-End Thermal Scope?