Nikon D6 setting machine, why is the exposure time long, the shutter waiting time long and the image blurred when shooting in the dark?

The shutter time is long because the automatic gear will automatically generate the combination of shutter aperture ISO (ISO is generally fixed). If the aperture is very dark, even if the aperture is the largest, the shutter will be longer, but the long shutter is difficult to hold and easy to blur. The long waiting time of shutter is due to the long noise reduction. 1 s shutter, noise reduction needs 1 s, 2 seconds takes 2 seconds, and so on.

Want to shoot fast, one is to improve the ISO, set the ISO to the highest, basically ok, but the film quality is very poor. There are also large aperture lenses, 50/ 1.4 and so on. The tripod will not increase the speed, but only ensure that the slow door does not shake.