Tips For Using A Pinhole Camera
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1. Partition
Generally, it is better to divide into 3-4 zones (zone 1, zone 2, zone 3, zone 4). For those who are particularly unskilled, they can even be divided into more zones. Operating by area is convenient for the photographer to grasp the orientation, and narrowing the location is an effective way to ensure that no missed shots are taken.
2. The choice of resolution
The index for evaluating the resolution of a pinhole camera is the horizontal resolution, whose unit is line pair, that is, the number of black and white line pairs that can be distinguished after imaging. The resolution of commonly used black and white pinhole cameras is generally 380-600, and the color is 380-480. The larger the value, the clearer the image. In general surveillance situations, black and white cameras with about 400 lines can meet the requirements. For special occasions such as medical treatment and image processing, a 600-line camera can get clearer images.
3. Imaging Sensitivity
Usually, the sensitivity of the pinhole camera is indicated by the minimum ambient illumination requirement. The sensitivity of the black and white camera is about 0.02-0.5Lux (lux), and the color pinhole camera is mostly above 1Lux. 0.1Lux cameras are used for ordinary surveillance situations; 0.02Lux cameras are recommended for use at night or when the ambient light is weak. When used with near-infrared lamps, a low-light pinhole camera must also be used.
4. The right way to move
The correct way to move the camera (camera) in use should be to move up and down against the hand, and move left and right against the chest. Generally, the scale of moving left and right is 1 cm to solve the problem.
5. Master the movement speed
The camera should be slow and not fast when shooting. A4 size paper is best for about 1 minute. In fact, it can solve the problem in 15 seconds for a particularly skilled person, but for more than 95% of the operators, this is a certain technical difficulty. Yes, it is more appropriate to master it in about 1 minute.
