DVTEL CF-4221-00, User'S Installation Manual

Page: 101 / 124

DVTel CF-4221-00 Fixed IP Camera User & Installation Guide
98
6.5.1 Exposure Setting
The Exposure pull-down menu is shown as follows:
The exposure is the amount of light received by the image sensor and is determined by the
width of lens diaphragm opening, the amount of exposure by the sensor (shutter speed) and
other exposure parameters. With this item, users can define how the Auto Exposure function
works.
Each exposure mode is specified as follows:

Auto Iris
In this mode, the exposure gives priority to the auto iris. Shutter speed and AGC
circuit will function automatically in cooperating with IRIS to get consistent
exposure output.

Auto Shutter
In this mode, the camera’s Shutter Speed works automatically to get consistent
video output level. The shutter speed range is from 1 to 1/30 sec. with 6
options. Users could select suitable shutter speed according to the environmental
luminance.

Fixed Shutter Mode
In this mode, fixed shutter speed could be selected from the dropdown menu.
The shutter speed ranges are:
o
Min shutter speed- When the camera is set to PAL there are 6
options: 1, 1/2, 1/3, 1/6, 1/12, 1/25.
o
Min shutter speed- When the camera is set to NTSC there are 6
options: 1, 1/2, 1/4, 1/8, 1/15, 1/30.
Users could select suitable shutter speed according to the environmental
luminance.