After I had seen some interesting work involving a technique where one paints a scene with a flashlight at night time, I decided to give it a try. To allow enough time to move around, I closed my lens to f8 and took several pictures with exposures ranging from 1 to 2 minutes. I also set the noise reduction to on. Back home, I was shocked by the huge amount of hot pixels that spotted the pictures. What would it have been if I had not activated the noise reduction ? I am now about to consider that long exposures at night (1 to 2 minutes) is out of the range of possibilities of a digital sensor and that flashlight painting photography is still a matter of film. What do you think ?