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Spacing Test article
When the film is marked up .. remove it from the camera and lay it down
and lets see what we have.
Now you will see the exact spacings between the frames.
Here I have 30mm from the start of the film until the first frame and
then a minimum of 3mm between each frame.
If your frame 1 is near the start like this , then all 12 shots should
be on the roll with some left over un-exposed film at the end. --
SWEET:-D