The camera settings stay constant. It's the filters that get changed as the ambient light changes. Earlier today, here in LA, I started shooting at 3pm. All my scenes include lots of sky. My manual settings for video are 1080/30 at a 60th of a second (the HDTV that I use for viewing is 1080p).
To maintain an EV of 0.0: at 3pm, I needed a 32ND-PL but as the sun continued to set, I needed to change to 16ND-PL, 8ND-PL, 4ND-PL. For the night scene, I switched to Auto with no filter. I also have a 64ND-PL for shooting on beaches -- a total of five filters.
I use only ND-PL filters as even when they have no effect on the sky, the ND-PL filters will decrease the light emanating from reflective surfaces, such as the bumpers on automobiles.
To be sure I am getting the maximum effect, I hold each filter close to my eye and rotate it using the fingertips of both hands. Once I've found the correct position, I hold the filter in place with my right thumb and forefinger and gently apply it to the gimbal of my MP, which I am holding in my left hand WITH THE GIMBAL CLAMP IN PLACE AND THE AIRCRAFT TURNED OFF.
All the filters are Polar Pro. They go on with only minimal pressure on the gimbal. However, to remove them, I not only have the gimbal clamp in place but also hold the lens with my left hand.
P.S. I bought the 4, 8 and 16 ND-PL filters as a set; the 32 and 64 are available separately on the Polar Pro website.
