The use of the camera is very simple. Normally, it is only necessary to properly install the lens, connect the signal cable, and turn on the power to work. However, in actual use, if you do not install the lens correctly and adjust the camera and lens status, you may not achieve the intended effect.
A, install the lens camera must be matched with the lens can be used, generally should be based on the actual situation of the application to match the appropriate lens, such as a fixed-focus lens or zoom lens, manual iris lens or auto iris lens, standard lens or wide-angle lens or long Focus lens and so on. In addition, attention should be paid to the interface between the lens and the camera, whether it is a C-type interface or a CS-type interface (this must be remembered, otherwise the CCD chip of the camera may be damaged if the C-type lens is directly screwed onto the CS interface camera).
When installing the lens, first remove the protective cover of the camera and the lens, then gently screw the lens into the lens connector of the camera and put it into place. For auto iris lenses, the lens control line should also be connected to the camera's auto iris interface. For motorized two-variable or three-variable lenses, as long as the lens is rotated into position, it is not necessary to correct its equilibrium state (only after After the focus adjustment is completed, it is necessary to finally correct its equilibrium state).
B. Adjust Lens Aperture and Focus Turn off the electronic shutter and backlight compensation on the camera. Position the camera at the scene to be monitored and adjust the aperture and focus ring of the lens to optimize the image on the monitor. If you use the camera in a place with a large variation in illumination, it is best to connect the auto iris lens and set the camera's electronic shutter switch to OFF. If the manual iris is selected, the camera's electronic shutter switch should be turned ON, and when the application site is brightest (maximum ambient light), the lens aperture should be as large as possible and still make the image the best (can not make the image too much 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.
In the above adjustment process, if you do not pay attention to when the light is bright, the aperture of the lens should be as large as possible, but it is relatively small, the electronic shutter of the camera will be automatically adjusted at a low speed, so it can still be formed on the monitor. Good 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.
C. Back focal length adjustment The back focal length is also called the back focal length. It means that when a standard lens (standard C/CS interface lens) is installed, the imaging of the captured scene can be set on the target surface of the CCD image sensor. When the camera is shipped from the factory, the back focus is properly adjusted. Therefore, in the application of the fixed-focus lens, it is generally not necessary to adjust the back focus of the camera.
In some applications, it may happen that when the lens focus ring is adjusted to the extreme position, the image cannot be clearly seen. In this case, you must first confirm whether the lens interface is correct. If it is correct, you need to adjust the back focus of the camera. According to experience, in most applications where a camera is equipped with a power zoom lens, it is often necessary to adjust the back focus of the camera.
The steps for back focus adjustment are as follows:
a. Mount the lens correctly on the camera.
b. Open the lens as much as possible to the maximum aperture (the purpose is to reduce the depth of field to accurately find the imaging focus).
c. Zoom out the lens to Tele Telephoto, take a close-up of an object other than 10m, and adjust the focus to adjust the close-up image.
d. Perform zoom out (Zoom Out) in the opposite direction from the previous step to pull the lens back to the Wide state. At this time, the screen becomes a panoramic image containing the above close-up objects, but focus adjustment cannot be performed at this time (Note: If The image at this time is blurred and the focus cannot be adjusted, but the next focus adjustment is prepared.
e. Loosen the hexagon socket screw that fixes the back focus adjustment ring on the front end of the camera, and rotate the back focus adjustment ring (for cameras without a back focus adjustment ring, rotate the lens directly to bring its built-in back focus ring) until the screen As clear as possible, then temporarily tighten the Allen screw.
f. Push the lens back to the telephoto state to see if the close-up object you just shot is still clear. Repeat the above steps a, b, and c if it is not clear.
g. Usually only one or two rounds are needed to complete the back focus adjustment.
h. Tighten the Allen screw and adjust the aperture to an appropriate position
A, install the lens camera must be matched with the lens can be used, generally should be based on the actual situation of the application to match the appropriate lens, such as a fixed-focus lens or zoom lens, manual iris lens or auto iris lens, standard lens or wide-angle lens or long Focus lens and so on. In addition, attention should be paid to the interface between the lens and the camera, whether it is a C-type interface or a CS-type interface (this must be remembered, otherwise the CCD chip of the camera may be damaged if the C-type lens is directly screwed onto the CS interface camera).
When installing the lens, first remove the protective cover of the camera and the lens, then gently screw the lens into the lens connector of the camera and put it into place. For auto iris lenses, the lens control line should also be connected to the camera's auto iris interface. For motorized two-variable or three-variable lenses, as long as the lens is rotated into position, it is not necessary to correct its equilibrium state (only after After the focus adjustment is completed, it is necessary to finally correct its equilibrium state).
B. Adjust Lens Aperture and Focus Turn off the electronic shutter and backlight compensation on the camera. Position the camera at the scene to be monitored and adjust the aperture and focus ring of the lens to optimize the image on the monitor. If you use the camera in a place with a large variation in illumination, it is best to connect the auto iris lens and set the camera's electronic shutter switch to OFF. If the manual iris is selected, the camera's electronic shutter switch should be turned ON, and when the application site is brightest (maximum ambient light), the lens aperture should be as large as possible and still make the image the best (can not make the image too much 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.
In the above adjustment process, if you do not pay attention to when the light is bright, the aperture of the lens should be as large as possible, but it is relatively small, the electronic shutter of the camera will be automatically adjusted at a low speed, so it can still be formed on the monitor. Good 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.
C. Back focal length adjustment The back focal length is also called the back focal length. It means that when a standard lens (standard C/CS interface lens) is installed, the imaging of the captured scene can be set on the target surface of the CCD image sensor. When the camera is shipped from the factory, the back focus is properly adjusted. Therefore, in the application of the fixed-focus lens, it is generally not necessary to adjust the back focus of the camera.
In some applications, it may happen that when the lens focus ring is adjusted to the extreme position, the image cannot be clearly seen. In this case, you must first confirm whether the lens interface is correct. If it is correct, you need to adjust the back focus of the camera. According to experience, in most applications where a camera is equipped with a power zoom lens, it is often necessary to adjust the back focus of the camera.
The steps for back focus adjustment are as follows:
a. Mount the lens correctly on the camera.
b. Open the lens as much as possible to the maximum aperture (the purpose is to reduce the depth of field to accurately find the imaging focus).
c. Zoom out the lens to Tele Telephoto, take a close-up of an object other than 10m, and adjust the focus to adjust the close-up image.
d. Perform zoom out (Zoom Out) in the opposite direction from the previous step to pull the lens back to the Wide state. At this time, the screen becomes a panoramic image containing the above close-up objects, but focus adjustment cannot be performed at this time (Note: If The image at this time is blurred and the focus cannot be adjusted, but the next focus adjustment is prepared.
e. Loosen the hexagon socket screw that fixes the back focus adjustment ring on the front end of the camera, and rotate the back focus adjustment ring (for cameras without a back focus adjustment ring, rotate the lens directly to bring its built-in back focus ring) until the screen As clear as possible, then temporarily tighten the Allen screw.
f. Push the lens back to the telephoto state to see if the close-up object you just shot is still clear. Repeat the above steps a, b, and c if it is not clear.
g. Usually only one or two rounds are needed to complete the back focus adjustment.
h. Tighten the Allen screw and adjust the aperture to an appropriate position
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