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EL-2800M-GE2 / EL-2800C-GE2
- 80 -
8.8 Lens
The EL-2800-GE2 can be used with 4 different types of auto iris lenses, in addition to standard
lenses with manual iris control. If an auto iris function is to be utilized, the lens type used must be
selected in Lens Select.
Table -25 Lens selector
Lens Select
Description (Control with
camera)
Note
P-Iris Lens
1) Iris position can be
remotely controlled
manually
2) Auto iris control is also
available
If P-iris lens is used, the
specific model name should
be selected in lens select.
Motor controlled lens
1) Iris position can be
remotely controlled
manually
2) Auto iris control is also
available
Video iris lens
Only auto iris control is
available
Factory Option
(Use AUX Type 2)
DC iris lens
Only auto iris control is
available
Factory Option
(Use AUX Type 2)
8.8.1 About P-Iris
New Elite Series EL-2800M-GE2 and EL-2800C-GE2 come equipped with P-Iris control as part of the
standard lens control function. The P-Iris system is a newly developed lens control method designed
to control the iris more precisely. Especially for video cameras in surveillance applications utilizing
megapixel CCD or CMOS imagers, it becomes a very important factor to control an iris in order to
achieve the maximum camera performance. In surveillance applications, depending on shooting
conditions, resolution and depth of field are important factors. The iris is deeply related with these
factors. If the iris diaphragm is smaller, but not too small, resolution gets better and the depth of
field is also deeper. The P-Iris system controls the iris diaphragm precisely and maintains the best
image with the highest resolution and depth of field. P-Iris can also combine with gain and
electronic shutter to keep the appropriate iris position under changing lighting conditions (ALC
function).
8.8.2 Setting for P-iris lens being used
P-iris lenses use an absolute setting value control system and therefore, if the following
parameters are input, precise iris position control is possible.
8.8.2.1 P-Iris lens select
Select the lens used. At present time, the following two lenses are available for these cameras.
P-Iris lens select
Description
Control step number
Open F value
LM16JC5MM
KOWA 16mm 2/3-inch
74
F1.4
LM35JC5MM
KOWA 35mm 2/3-inch
73
F2.0