Backlight Compensation BLC OFF - The camera Automatic Light Control (ALC) responds to the average content of the entire video picture. BLC ON - The camera ALC responds predominantly to the center of the picture, shown by the diagram. If an object of interest falls inside the BLC area, its visibility will remain relatively constant even if the background illumination varies. Fitting and adjusting the lens - LTC 0240 only
BLC area
A
To fit the lens, hold the camera head with its front facing downwards and then: a. Remove the dust cap from the lens mount. b. Ensure that the back-focus lever (A) is loose and screw the lens into the CS-mount. c. Set the lens distance to infinity. d. Screw the lens �in� or �out� until the picture is sharp (object distance should be more than 15m). e. Tighten the lens by locking the back focus lever (A). CAUTION Check that the lens protrusion behind the rear face of the back flange does not exceed 6 mm and that the diameter of the back flange exceeds the inner diameter of the CS-mount, i.e. 27 mm.
