Is there any way to get a longer shutter than 8 seconds? I have litchi and autopilot. Any other software that might allow it or is it limited in the camera itself?
I dont see why it could be limited by the camera. I assume they didnt include a "B" setting because it would be rare that your drone would stay perfectly still long enough for a slow exposure to not be blurry.
If you are looking for longer exposures at night, try using ND filters 4 or 8. This should block enough light going into your camera to increase the exposure time.