Okay, I have been trying to get a good lightning shot but have taken a ton of pictures of regular night sky. I am using a Kodak DX6490 so the longest I can leave the shutter open is for 16 seconds. The smallest aperature that I have is an f8. Besides sitting in the same spot for hours on the occasion that a storm will come at night, what else can I do? I have read somewhere that you can get an ND filter and it will allow you to leave the shutter open in the daytime but I don't want to get something else without knowing what good it will do for me.