The invention relates to a method for determining the moment of ignition in the basic oxygen method, in particular in the LD method, in a steel converter (1), wherein the radiation arising upon the ignition, which exits between converter mouth and exhaust hood (5), is detected. To allow reliavle determination of the moment of ignition, it is provided that at earliest beginning with the oxygen blowing or reaching a specific images of the same region between converter mouth and exhaust hood (5) are recorded by means of a sensor (14), which contains multiple photodiodes, each corresponding to one pixel, preferably by means of a CCD image sensor, based on the radiation intensily over time is determined and the moment at which a predetermined radiation intensity is reached is established as the moment of ignition.
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