Patent ID: 8130283

Claim:
A method for monitoring set parameters of a motion-picture camera such as focus, brightness and exposure settings with film images which are extracted from a recording beam path of the motion-picture camera and which are converted into digital assist signals by an optoelectronic transducer arranged in an assist beam path of the motion-picture camera, said assist beam path being interrupted periodically depending on an image recording frequency of the motion-picture camera, which digital assist signals are output to a processing unit with an image frequency matching the image recording frequency of the motion-picture camera or with an assist image frequency, to which processing unit recording, control and/or status signals of the motion-picture camera or of devices connected to the motion-picture camera are additionally fed as metadata, wherein the processing unit analyzes digital assist images composed of the digital assist signals and outputs digital output data and control signals to control modules of the motion-picture camera and/or to a network, and/or as analog or digital video signals to a monitor connected to the processing unit, wherein the processing unit analyzes a frequency distribution in the digital assist images that are composed of the digital assist signals and reproduce the film images during a variation of the focusing of the camera lens, determines the proportion of high frequencies in different focus settings and sets a focus of the camera lens to a value at which a digital assist image has a maximum of high frequencies.