User manual

ARECONT VISION USER MANUAL 41
Arecont Vision 425 E Colorado St, 7
th
Floor Glendale, CA 91205 8/1/2012
www.arecontvision.com
Auto-Iris
The Auto-Iris menu allows you to monitor the state of the automatic DC iris. If the scene is too dark, the
camera will open the iris fully. This allows more light onto the sensor and will substantially improve the low-
light performance. If the scene is too dark when the camera is started, the camera will not close the iris until
there is enough illumination. Camera DC auto-iris can be configured using “Auto-Iris” menu (Figure 24):
Figure 24. Auto-Iris menu
The status of the auto-iris is displayed on a color panel at the
bottom of the Auto-Iris settings. There are six states possible:
 Disabled: The auto-iris is either disabled by un-checking
the Enabled check box, or is not present.
 Evaluating: The camera is preparing to close the iris.
 Too Dark:
The camera cannot close the iris because the
scene illumination is too low.
 Closing: The iris is closing down by the number of F-stops
appropriate for the lens model.
 Closed: The iris is closed.
 Opening: The iris is opening.
Auto-iris will open the lens fully once the on-camera analog gains
exceed a certain level. The gain scroll bar adjusts the point where the
auto-iris will open fully: the higher the gain, the later the auto-iris will
open as the illumination diminishes.
The iris can be disabled by un-checking Enabled. The camera will
open the iris fully and have electronic auto-exposure working. This
configuration is identical to using a manual lens.