SP-5000M-USB / SP-5000C-USB
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B/W
Color
Defective Pixel
Fig.50 Blemish compensation
Note: If defective pixels are found consecutively in the horizontal direction, the blemish
compensation circuit does not work.
8.7 Lens control
The SP-5000M-USB and SP-5000C-USB 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 - 37 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
DC iris lens
Only auto iris control is
available
Factory Option
8.7.1 About P-Iris
New Spark Series SP-5000M-USB and SP-5000C-USB 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).