[Frameworks] flickering

[Scott Dorsey]

If you photograph with a strobe, what happens is that not every frame gets
exposed.  That is, let's say you're shooting 24 fps and you shoot with a 
strobe that is firing right at 12 fps and happens to be timed so the shutter
is fully open at all times.  Every other frame is exposed, and when you
project the film you get flashing.

Now, that flashing doesn't look anything like a strobe light, because you
are showing each frame for a full 1/24 sec.  It also doesn't look the same
as slowing the frame rate down either.

In real life the camera is usually drifting in speed a bit and the strobe
is drifting in speed a bit and they are never quite synched, so there is
a slow variation going on as well.  You might like it, you might not.
--scott