Panasonic NV-VX1EN [96/132] 1oigis

Содержание

ft A ENGLISH Operation Principle of the Auto Focus Function Automatic Focusing As shown in Fig T above when you aim the Movie Camera at the subject you want to record the microprocessor moves the lens little by little based on the information about vertical contours of the subject in the picture signal At the point where the vertical contours of the subject become sharpest it judges that the subject is in focus and stops the lens See Fig 2 Special Characteristics of the Movie Camera s Automatic Focus Adjustment Function A It adjusts the focus for sharpest vertical lines B It adjusts the focus on parts of the subject with strong contrast C It adjusts the focus only on the centre part of the picture on the Viewfinder Screen The area where the subject is in focus is much smaller than the TV screen as shown in the Fig 3 T Focusing Lens 5 Motor 2 CCD Image Sensor 6 Video Signal Signal Processing 7 Focusing Lens Microprocessor 8 TV Screen sm R w left A B io fisofuKW miiwoAtwiw aB OH 1OigiS 9 Image area on which the Auto Focus Function adjusts the focus Unlike the human eye however the Movie Camera s Auto Focus System cannot change the focus from a distant to a close subject without any delay 106

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