I’m curious if anyone knows the history of “ramping” in cinematography. This is when the camera speed changes, and the ensuing speed change is compensated for via a change in the iris, or with a change in the shutter angle. The first use of it to great effect I can think of is in “Raging Bull”. Lately it has appeared in all kinds of films and commercials. Is anyone aware of who came up with this technique? What is the first example you can think of? What is (are) the best example(s) you can think of?