Panasonic NV-GS500 Operating Instructions - Page 67

Others ª White balance The image recorded by the movie camera may become bluish or reddish under the influence of light sources. To avoid such phenomena, adjust the white balance. White balance adjustment determines the white colour under different light sources. By recognizing which is the white colour under sunlight and which is the white colour under a fluorescent lamp, the movie camera can adjust the balance among the other colours. Since white colour is the reference of all colours (light), the movie camera can record pictures in a natural hue if it can recognize the reference white colour. ª Auto focus Auto focus automatically moves the focusing lens forward and backward inside the movie camera to bring the subject into focus. Auto focus has the following characteristics. ≥Adjusts so that the vertical lines of a subject are seen more clearly. ≥Attempts to bring an object with higher contrast into focus. ≥Focuses on the screen centre only. Due to these characteristics, auto focus does not work correctly in the following situations. Record pictures in the manual focus mode. Recording a subject with one end located closer to the movie camera and the other end farther away from it ≥As auto focus adjusts at the centre of an image, it may be impossible to focus on a subject that is located in both the foreground and background. Recording a subject behind dirty or dusty glass ≥The subject behind the glass will not be focused because the focus is on the dirty glass. Recording a subject that is surrounded by objects with glossy surfaces or by highly reflective objects ≥The recording subject may become blurry because the movie camera focuses on the objects with glossy surfaces or on highly reflective objects. Recording a subject in dark surroundings ≥The movie camera cannot focus correctly because the light information that comes through the lens decreases considerably. Recording a fast-moving subject ≥As the focus lens-inside moves mechanically, it cannot keep up with a fast-moving subject. Recording a subject with little contrast ≥A subject with little contrast, such as a white wall, may become blurry because the movie camera achieves focus based upon the vertical lines of an image. 67 VQT0T47