The problem phenomenon is: after the color of the camera screen turns to black or black to color, the auto focus is not clear and the image is blurred.

Method applicable to: cameras with variable focal length

【problem causes】
When the camera that supports auto-focusing is switching between day and night mode, after ICR filter is switched, the software will set to refocus once due to the different sensor receiving changes. However, if there are many point or strong light sources in the scene during this focus, the focus is Difficulties can easily cause false focus. And the semi-automatic focus mode only focuses once, and will not refocus after being out of focus, so it will cause the picture to be out of focus during the day or night.

【Solution】
1. The focus mode can be modified to auto focus. The disadvantage is that the light source changes frequently in the screen and the focus will be repeated.
2. Scene adjustment to avoid strong light sources affecting the focus when switching between day and night. If it is a dome camera, you can also increase the motion of the dome camera to focus by calling presets through timed tasks.