C7DN
·
User Manual
92
Problem 3:
The camera is installed with an auto -iris lens. You adjust the focus
to get a clear image in the daytime. But the image is defocused at
night.
Possible Reasons:
In the daytime, the illumination is high, so the iris is adjusted to a
small size automatically. The DOF (depth of field) is long. But at
night, the iris is adjusted to a large size automatically, so the DOF
is shortened. The focus you adjusted in the daytime now locates
out of the DOF, so the image is defocused at night.
To Solve the Problem:
When you adjust the focus for a camera with an auto -iris lens, you
need to set the lens type to AES (auto electronic shutter) mode.
Under AES mode, the iris is adjusted to the largest size
automatically. Then you can adjust the focus to get a clear image.
At last, you need to set the lens type back to AI (auto iris) mode.
Or you can adjust the focus in low illumination condition, such as at
night.
Problem 4:
A camera with OSD menu and an auto -iris lens displays black video.
But the OSD menu can be called and displayed.
Possible Reasons:
Auto-iris lens connector is loose contact.
Or the iris driven mode of the camera does not match with the
mode of auto-iris lens.
Содержание C7DN
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Страница 23: ...Day Night Box Camera User Manual 23 Figure 2 6 Panning Figure 2 7 Tilting...
Страница 25: ...Day Night Box Camera User Manual 25 Monitor Power Figure 2 8 Wiring...
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