Excellent video... again! I am guessing it may be your next video, but I would like to know HOW you ramp the ISO/Shutter/Aperture. I would love to discover there is some app in my iPhone, or other low cost -- and low extra equipment -- to accomplish this. (FWIW, I am now shooting with a Sony A7R3) We are heading to California Monday, where I will have lots of chances to do something like this, but ramping is still a mystery to me...