Re: super-8 to 16mm blowup

From: Jeff Kreines (email suppressed)
Date: Fri Apr 07 2006 - 01:17:47 PDT

On Apr 6, 2006, at 11:34 PM, Ken Bawcom wrote:

> I think you're all off on your math. If it doubles every second
> frame of 8mm 18fps, that will produce 27 frames of 16mm. 24 of
> those frames will be projected in one second, leaving 3 frames.
> 3/24 = 1/8, or 1/8 of a second extra. So, 8 seconds becomes 9
> seconds, 8 minutes becomes 9 minutes, etc. You would multiply the
> 8mm 18fps time by 1.125 to get the projection time of the 16mm print.

But the question was about converting 18 fps material to 24 fps -- so
one will just have to either run the printer manually or set the
sequencer or computer to double every third frame.

Doubling every second frame will yield, as you suggest, 27 fps
material -- a big difference from 24 fps.

I have in the past done 18 to 24 fps conversions of S8 sound
material, and it worked very nicely.

It was so long ago I think Jon Rubin did the blowup. Hello, Jon, if
you're out there...

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