By factory default the shutter is initialized when the temperature at the detector changes by 0,5°C. An additional timing elapse function is also implemented and can also be activated. When a camera has just been started it will get to his working temperature. During this time the detector will warm-up and will be shuttered several times to assure the quality of the image. When the detector temperature is stable within +/- 0,5°C , it will not shutter again.