Assuming you use a CCD image sensor, would it be possible for you to take images with exposure time of 1s without stacking image?
I'm wondering how you can decrease data rate of the CCD. CCD camera has ADC and ADC has its own clock frequency. Let's assume that the clock frequency of your ADC is 20Mhz and its bitdepth is 10-bits . Then it outputs 10-bits data every 50ns. Therefore during 1s you would have lots of meaningless data. So in order to take long exposure image, you always need to process data(remove meaningless data) and stack images. Could anyone please let me know if I'm correct?