1. Pinhole type
In fact, what people usually call a pinhole camera does not use a pinhole lens. Pinhole lens refers to a lens that uses the principle of small hole imaging to obtain images. It is inexpensive and simple in principle, but its fatal weakness is that too little light passes through the small hole, resulting in too long exposure time. Taking photos with a pinhole lens in sunlight can take anywhere from a few minutes to a dozen minutes, especially when shooting at night with exposure times of up to several hours. Obviously, for a camera that shoots dozens to dozens of frames per second, it cannot meet the requirements. Pinhole lenses cannot be applied to cameras, Hidden Spy Mini Camera so there is no "pinhole" camera in the strict sense. As is customary, a miniature 4G Camera PTZ WiFi small camera using a fisheye lens, a flat lens or a conical lens is called a pinhole camera.

According to the lens, Mini DV CCTV Camera the lens of the pinhole camera can be divided into three types: fisheye lens, flat lens and conical lens; according to the photosensitive element used, it can be divided into charge coupled device (CCD) and complementary Complementary Metal-Oxide Semiconductor (CMOS); and according to the data transmission method, it can be divided into two categories: wireless cameras and wired cameras.

2. Wireless
The wireless device is used stably in the domestic wireless environment. Micro wireless surveillance camera features high stability, high speed, long distance, and multi-point testing. It can play a huge role in the fields of environment, energy, construction, transportation, medical treatment, industrial machine condition monitoring, etc., especially when the wiring is complex, the wiring cost is high, the long-distance and large-scale data transmission and mobility requirements are high. obvious.

3. Appearance classification
1. Indoor device shape: such as speakers, sockets, chargers, lamps, picture frames. The miniature cameras are cleverly placed in these objects, so as to achieve the purpose of monitoring the home environment and protecting the personal and property safety of the home.

2. Personal accessories: watches, glasses, ties, lighters, badges. The camera is made into the shape of an ornament, which can easily conduct unannounced interviews and recordings.

3. Shape of daily necessities: tissue boxes, beverage cans, car keys, light switches, power strips, alarm clocks, flashlights. Cameras of this shape can be freely placed in the position to be monitored for monitoring.