Shutter Speed stop down V.S. ND

[Will Keir]

Like that story. Thanks for sharing it.

In his stress I walked up to him, as a VFXsup, which is not always (and espeically in this case) not the most popular thing to do, and told him that we should open the door half as fast and shoot it @ 12fps 360 shutter and then he would gain 2 stops... First he looked at me with evil eyes but shortly after he bought me beer. So I think I got his mind onto somthing. Lol.

 

[Will Keir]

Thank you for entering into this discussion David. It's a good point.

Landscape work with clouds, seems like a way to gain light and even speed the pace of the clouds by 2x? Or fog, speed the pace of fog rising/falling.

What a wonderful world of creative options, outside of the BOX.

These shutter tricks are fine when nothing is moving or hardly moving -- but if we're talking about MOTION pictures, that is rarely the case.

 

[Will Keir]

You mean the 45 degree, 1/192 shutter of SPR?

This is what you also mean by "peel" the actors from the background? 45 degree shutter?

All based on movement: two examples.

To have a short shutter speed results in an aesthetics of "Saving Private Ryan".

If the f-stop is fixed and using then a long shutter speed, while pivoting around the actor, "peels" him/her from the background, based on more motion blur of the BG.

 

[Will Keir]

Would you mind posting and example of "Double Motion Blur?"

We do it all the time when the milo can not move fast enough.... then the actors simply have to go down to "quarter speed acting" and we shoot them in 6.25fps with ND

It's no joke, for some stuff it works very well and everyone have far better chance to hit their que mark.

Then when telling them to do the same thing but in reverse people they usually get a bit irritated.


Also when doing moco I try to shoot 4x the wanted FPS a lot of times and do so with 360 shutter then I got enough in between frames to do motion estimated retime and also have the option to choose merge two frames to get more motion blur or use one to get less. It's a good option to use when fast pans and such are in use and you do not know if it will cause strobe on a big screen, or if part of the move needs more motion blur then the rest or such. The 360shutter is fantastic for merging two frames together and get double motion blur.. something film could never do as it's missing info between frame one and two.

 

[Scott Lamoreaux]

Old post but say you're shooting 60fps slowmo. Would you still use 180 degree shutter or go faster for the crisp look?

 

[David Mullen ASC]

Depends on the look you want, generally you'd stick to 180 degrees, but if you have the light for it, even shorter shutter times would make moving things like rain drops or flying bits of dirt from an explosion crisper, like for sports or action.