I know the Rule of thumb is that your frame rate should be half your shutter speed and based on how overexposed you are that dictates which ND filter to use. But what about during sunrise and/or sunset when the lighting conditions are changing. I know you may only be in the air 20 minutes but even during that short window the difference can be surprising. Do you set to auto during this time or just do corrections in post processing? Looking for feedback, thanks!