Tail lights in Otomo's Akira

[David Blair]

hi Bruce,

I think you already mentioned shutter angle, but just to pass by that 
point again....
the frame stands still for something like 1/24th sec,
the iris controls exposure,
and so does the angle of the shutter opening...
ie the flat disk rotating parallel to the film,
on which you can open or close a wedge-shaped hole.
Large angle means that fast moving objects are exposed longer,
and they can blur or even smear...
that can be taillights, or even the image on a tv screen.

hope that is both correct and clear,

best,
David


Bruce Baird wrote:
> I thank Kurt for this response, but also want to press a bit further.  
> I understand the mechanics of how you do this in still photography.  
> But does anyone know how you do this in motion pictures?  Can you 
> leave the aperture open when the film is passing behind the aperture 
> to be exposed at 24 frames per second?
>
> Best,
>
> Bruce