What if the hotel has a camera?

First of all, many methods circulating on the Internet to find pinhole cameras are only effective for low-end infrared pinhole cameras, such as using a mobile phone camera to detect the infrared fill light of pinhole cameras, turning on the mobile phone camera when it is dark indoors, and turning around indoors, where the screen shows bright spots is the camera.

With the development of imaging technology, some pinhole cameras can still take clear photos without the supplementary function of infrared light. This method is useless for this kind of camera. Although professional testing equipment can detect any hidden pinhole camera, it is obviously unrealistic for everyone to take it on business trips and stay in hotels.

Secondly, although the lens of pinhole camera is not as exaggerated as the name says, the aperture is really small. The following two pictures are conventional pinhole lenses, not the smallest. Compare it with the nearby 1 dime. Can you find this kind of aperture in a strange room?

Finally, when we go out to stay in hotels, we should be vigilant, try to choose regular hotels, and don't expose our privacy too much. After entering the room, visually inspect the places where pinhole cameras are easy to install, such as ceiling, TV, computer, bookshelf, bedside lamp, clothes rack, socket, ornaments, smoke detectors, fire detectors, etc.

Of course, you can also use the method of mobile phone detection. If you find suspicious lights, lines, sounds, etc. , you can simply cover them with items or consult the service personnel.