JAI SP-5000M-CXP4 User Manual

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JAI SP-5000M-CXP4 User Manual Manual pdf 58 page image

SP-5000M-CXP4 / SP-5000C-CXP4- 56 -Lens Select Description (Control withcamera)NoteP-Iris Lens 1) Iris position can beremotely controlled manually2) Auto iris control is alsoavailableIf P-iris lens is used, thespecific model name shouldbe selected in Lens Select.Motor controlled lens 1) Iris position can beremotely controlled manually2) Auto iris control is alsoavailableVideo iris lens Only auto iris control isavailableFactory OptionDC iris lens Only auto iris control isavailableFactory Option8.8.1 About P-IrisNew Spark Series SP-5000M-CXP4 and SP-5000C-CXP4 come equipped with P-Iris control as part ofthe standard lens control function. The P-Iris system is a newly developed lens control methoddesigned to control the iris more precisely. Especially for video cameras in surveillance applicationsutilizing megapixel CCD or CMOS imagers, it becomes a very important factor to control an iris inorder to achieve the maximum camera performance. In surveillance applications, depending onshooting conditions, resolution and depth of field are important factors. The iris is deeply relatedwith these factors. If the iris diaphragm is smaller, but not too small, resolution gets better and thedepth of field is also deeper. The P-Iris system controls the iris diaphragm precisely and maintainsthe best image with the highest resolution and depth of field. P-Iris can also combine with gain andelectronic shutter to keep the appropriate iris position under changing lighting conditions (ALCfunction).8.8.2 Setting for P-Iris lens being usedP-Iris lenses use an absolute setting value control system and therefore, if the followingparameters are input, precise iris position control is possible.8.8.2.1 P-Iris lens selectSelect the lens used from the P-Iris select list. At this moment, there are no 1-inch P-Iris lensesavailable in the list. When P-Iris Lens Select is opened, the following lenses are indicated but theyare 2/3 inch format. If they are used, the corners of the image may be vignetted.Table – 21 P-Iris lens selectP-Iris lens select Description Control step number Open F valueLM16JC5MM Kowa 16mm 2/3” 74 F1.4LM35JC5MM Kowa 35mm 2/3” 73 F2.08.8.2.2 Step max.Iris control step depends on lens. The setting value uses the value stored in the camera.8.8.2.3 PositionThe iris position can be set between 0 to Step Max. 0 means to open the iris and Step Maxmeans to close the iris.In the following conditions, the camera initializes P-Iris control and acquires iris position.