What do you think of the aperture of the driving recorder?

The bigger the aperture, the better. For example, the portrait fixed-focus lens we use in SLR has an aperture up to F 1.2 F 1.4, and the amount of light entering is particularly large, but at the same time, it also creates a problem. The larger the aperture, the shorter the effective focal length. Just like the photos we take with a fixed-focus portrait lens, it usually produces a great depth of field. One side of human nature and the rear are blurred, but people are particularly clear. When this effect is applied to the driving recorder, the five-meter license plate can be seen clearly, while the three-meter and ten-meter license plates are particularly blurred. Therefore, while paying attention to the large aperture, we should also strengthen the effective focal length. According to the report of the Research Department of Shenyou Driving Recorder, the aperture F2.0 is the most suitable aperture value. In fact, among many parameters that affect the night vision of driving recorder, the aperture size should account for a large proportion. Now some driving recorders make a fuss about infrared fill lights, increasing to 8 10 or even more. It is better to study the lens parameters. After all, if the infrared power is small, it won't play much role.