First, when adjusting the lens aperture and focusing lens <br> <br> installation, first remove the protection of high-definition surveillance cameras and lens cover, and then gently screwed into the lens of the camera and the lens mount in place. Manual iris should be the camera's electronic shutter switch to ON, and in the application site is the brightest (ambient ambient light), the lens aperture as large as possible and still make the image the best (can not make the image too white and overloaded ), the lens is adjusted. Put on the protective cover and put on the bracket. Because the aperture is large and the depth of field is relatively small, the sharpness of the entire surveillance site should be taken into account as much as possible when focusing. When the illuminance at the scene is reduced, the electronic shutter will automatically adjust to a slow speed. With a larger aperture, the image will still be satisfactory. During the adjustment process, if you do not pay attention to opening the lens as large as possible but the light is closed when the light is bright, the camera's electronic shutter will be automatically adjusted at a low speed, so it can still be better on the monitor. Image; but when the light is dimmed, because the aperture of the lens is relatively small and the electronic shutter is already at the slowest (1/50s), the imaging at this time may be dim.
Second, the adjustment of the back focus
The back focal length is also called the back focal length. It means that when the standard lens (standard C/CS interface lens) is installed, the imaging of the captured scene can be exactly on the target surface of the CCD image sensor. Generally, the HD surveillance camera is shipped from the factory. The back focus has been properly adjusted. Therefore, in the application of a fixed-focus lens, it is generally not necessary to adjust the back focus of the camera.
(1) Mount the lens correctly on the camera.
(2) Open the lens as much as possible to the aperture (the purpose is to reduce the depth of field to accurately find the imaging focus).
(3) Push the lens to telephoto status with ZoomIn, take a close-up shot of an object Other than 10m, and adjust the focus by adjusting the focus.
(4) Perform zoom out (ZoomOut) opposite to the previous step to pull the lens back to the Wide state. At this time, the screen becomes a panoramic image containing the close-up object described above, but focus adjustment cannot be performed at this time (Note: If the image at this time is blurred, the focus cannot be adjusted, but the next focus adjustment is prepared.
(5) Loosen the Hexagon socket head screw used for fixing the rear focus adjustment ring at the front end of the HD surveillance camera, and rotate the rear focus adjustment ring (Camera without the rear focus adjustment ring rotates the lens directly to drive the built-in back focus ring) Until the picture is clearest, then temporarily tighten the Allen screw.
(6) Push the camera to the telephoto state again to see if the close-up object just taken is still clear. Repeat the above steps a, b, and c if it is not clear.
(7) Usually only one or two rounds are required to complete the back focus adjustment.
(8) Tighten the Allen screw and adjust the aperture to an appropriate position.
According to the above method, try to install a million HD IP camera, and then you can debug to see if the screen meets the requirements. If there is a problem, you can check according to the above method to see if there is any mistake, or consult a professional surveillance camera technician. Learn the detailed solution.
Second, the adjustment of the back focus
The back focal length is also called the back focal length. It means that when the standard lens (standard C/CS interface lens) is installed, the imaging of the captured scene can be exactly on the target surface of the CCD image sensor. Generally, the HD surveillance camera is shipped from the factory. The back focus has been properly adjusted. Therefore, in the application of a fixed-focus lens, it is generally not necessary to adjust the back focus of the camera.
(1) Mount the lens correctly on the camera.
(2) Open the lens as much as possible to the aperture (the purpose is to reduce the depth of field to accurately find the imaging focus).
(3) Push the lens to telephoto status with ZoomIn, take a close-up shot of an object Other than 10m, and adjust the focus by adjusting the focus.
(4) Perform zoom out (ZoomOut) opposite to the previous step to pull the lens back to the Wide state. At this time, the screen becomes a panoramic image containing the close-up object described above, but focus adjustment cannot be performed at this time (Note: If the image at this time is blurred, the focus cannot be adjusted, but the next focus adjustment is prepared.
(5) Loosen the Hexagon socket head screw used for fixing the rear focus adjustment ring at the front end of the HD surveillance camera, and rotate the rear focus adjustment ring (Camera without the rear focus adjustment ring rotates the lens directly to drive the built-in back focus ring) Until the picture is clearest, then temporarily tighten the Allen screw.
(6) Push the camera to the telephoto state again to see if the close-up object just taken is still clear. Repeat the above steps a, b, and c if it is not clear.
(7) Usually only one or two rounds are required to complete the back focus adjustment.
(8) Tighten the Allen screw and adjust the aperture to an appropriate position.
According to the above method, try to install a million HD IP camera, and then you can debug to see if the screen meets the requirements. If there is a problem, you can check according to the above method to see if there is any mistake, or consult a professional surveillance camera technician. Learn the detailed solution.
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