Electronic iris function setting
Use a manual or fixed iris lens and set the lens aperture to the
shortest F stop. Set the EI/BLC switch (model VCB-3170P) to EI
(electronic iris)-ON or the EI switch (model VCB-3100P)) to the ON
position.
The dynamic range of the electronic iris will be as indicated in table
B.
CAUTION:
• The electronic iris is suitable for normal indoor use. When the
EI/BLC or EI switch is set to the EI-ON or EI position, do not
use an auto-iris lens.
• If used under fluorescent light, the image may flicker and
horizontal lines may appear in the picture. In such a case,
change to incandescent lighting or set the EI/BLC or EI switch to the OFF position and
use an auto-iris lens.
• When shooting bright subjects, pay attention to the light angle in order to avoid or
minimize the smear phenomenon effect.
When using an auto-iris lens (for indoor/outdoor use)
Set the EI/BLC or EI switch to the OFF position.
CAUTION:
If conditions are outside the electronic iris operation range or more than the maximum
illumination, it will cause saturation of the CCD. In that case, use a manual iris lens.
Table B
Model F stops Minimum illumination Maximum illumination
VCB-3170P
F 1.2
0.1 lux 26,000 lux
F 1.4
0.14 lux 34,000 lux
VCB-3100P
F 1.2
0.1 lux 57,000 lux
F 1.4
0.14 lux 78,000 lux
ON
OFF
ON
EI
BLC
(VCB-3170P)
ON
OFF
EI
(VCB-3100P)
L73M5, N5/XE GB 1996, 10, 31
10 English
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