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Exposure: Exposure is the key you can get good image with. Exposure
setting is highly dependant to the ambient light (type and
strength), and varies from one situation to another.
In this section there are 3 items can change actual exposure
and 3 others are for image quality modification:
exposure factor: iris, shutter, sens-up
image quality factor: brightness, AGC, SNR
Some of these factors are conflict to each other in certain
modes; refer to OSD table 4 for the details.
Brightness: Human eyes are more sensitive to brightness than other
image factors, meaning that brightness control is quite
important. Brightness is very personal subjective, therefore
you need try the adjustment with your visual system.
.
reminder: brightness control is also available on most display.
Check your display to ensure the monitor has correct
brightness setting.
Iris : Iris is one of the two major mechanisms for exposure level
control, besides shutter speed.
Iris is the window for light to pass onto CCD (sensor), so the
size of it will determine the energy of light can reach CCD at
a time. Therefore, bigger iris provides brighter image, while
smaller iris will give darker picture.
Iris options are AUTO and MANUAL;
suggestion: AUTO is more recommended for most conditions, unless
you have particular environment (such as indoor with
stable lighting), because it adapts better to the changing
ambient illumination.
note: While iris is in auto mode, it has the priority for exposure
control. Shutter speed will be fixed,(“---“ on shutter)
unless you manually apply shutter with other setting.
note: Manual control allows you to adjust iris size from
complete closed (“0”) to fully open (“100”).
If you set iris to “manual”, then shutter takes over the
priority position for exposure control (seeing “ESC” on
shutter setting).
Shutter : Shutter is the “pseudo” mechanism for controlling exposure
time. In normal indoor condition, shutter speed is usually set to
1/60 second
(1/50 for PAL system)
. In stronger light condition,
shutter must be reduced, or image could be washed out. For