To it’s most simple core all “Slow Motion” is, is boiled down to this: opposite film speed. It’s cranking the frame rate faster to get slower reactions in 24fps screened but to get that effect you must use frame rates higher than 24 fps such as 120-360+. Picture this, you want a shot with pyrotechnics involved, ok? So you CRANK, whether by hand or digitally, the camera fast to a certain count or rate such as a very high count (extreme slow motion effect) of 1,000 fps. That will give the illusion that the blast looks as though it was T.N.T., huge explosion, ok? But in reality, the actual effect was less than a second to 3 seconds in length only. Now, if the DP didn’t over-crank, that’s what we call the technique in the business, if he didn’t OVER-CRANK the footage, then it would appear fake or toy-like onscreen or given the illusion of UNDER-CRANKING which is the opposite, appearing faster onscreen (example: 28 DAYS LATER, WALKING DEAD, or when DP’s shoot for speeding vehicles effect but vehicle is only going 40mph giving the illusion 3 times faster like 120mph). Now do you understand? I put it in simple terms for you just as I do when I’m consulting people on Proof Of Concept Short Films. I’m also a Special Photographic Effects Consultant in Jersey.
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