[Frameworks] 16mm Double perf clear leader

[Scott Dorsey]

> What do you mean by long or short perf?

Peforation pitch.  The space between perfs is slightly wider on camera stock
than on print stock, so they can be wound one on top of the other on a big
sprocket and held in place without slipping for contact printing.  So the
leader and splicer you use are different (although a lot of splicers can be
set up either way by the tech).
--scott