Post by Doghouse6 on Sept 18, 2017 0:20:58 GMT
I talked to my friend and he explained that (with the 2 frame pull down in the camera) you're actually shooting at a shutter speed of 1/48th of a second. But unlike with a still camera, in which you could see movement at that shutter speed and therefore would want the camera and the subject to remain still, in a film you actually want that movement captured on the frames as they flow, because it augments the movement perceived in the camera and then later on the screen.
I know this sounds counter-intuitive, but that's how it works. He said if you didn't have that, if you shot at too high a shutter speed (which can be done under certain circumstances, but isn't desirable), it would actually make things look jerky when projected.
I hope this answers all your questions. And thanks for enabling me to learn something new, too.
Oh, and he told me that for the light change we discussed, he would light for the brightest first, and then for darkest (the brightest being the standard against which the darkest is set).
Huh?
So here's what I mean: although motion picture film advances at a rate of 24 fps, each frame can't remain stationary in the gate for the full 1/24th of a second, as the mechanism must allow time between each exposure for advancement to the next frame; hence, a normal 180° angle of the rotary shutter results in an exposure of 1/48th of a second, with the film then advancing to the next frame (while the shutter is in the "closed" position) during the remaining 1/48th of a second.
Now, am I off-base on that, or is "2 frame pull down" merely a term economically-coined to describe that operation (rather than a literal one indicating that the sprockets actually advance the film 2 frames at a time)?
And I hope I've at least posed those questions in an intelligible way.