99ENG5 ALC Lens Selection SwitchThis switch is used to select the type of the Auto Iris lens foruse. After this setting, you have to also set the lens type in theSetup menu (In ALC… submenu of IRIS). DC: When the Auto Iris lens is installed for DC controlsignals, set the switch to “DC.” VIDEO: When the Auto Iris lens is installed for Videocontrol signals, set the switch to “VIDEO.”Auto Iris Lens (Optional)This lens is installed on this camera.NoteWhen the camera lens becomes dirty, softly clean it with a lenstissue or a cloth soaked in pure ethanol.