A Frame Tracing Study of the Zapruder Film
Robert S. Fritzius - Shade Tree Physics
Installed 06 Nov 2013. Latest Update 28 Oct 2017. Text changes or modifications are in bold.
The Warren Commission investigaton into the Assassination of John F. Kennedy used enlarged printed black-and-white frames from the Abraham Zapruder Dealey Plaza film as an aid in their investigation. The frames, labeled in numerical sequence, were provided to the commission by the Federal Bureau of Investigation. These were published in Volume XVIII of the commission's hearing.(1)
Here is a line drawing mosaic of the Zapruder film, from frame 171 to 334. It was made from rapidograph ink tracings on acetate overlays of salient elements in the black-and-white frames. (The acetate frame tracings were made in about 1984.) The tracings were scanned into gif files in November 2013 and were then superimposed onto each other to make the mosaic. In each tracing a dot was drawn to represent center-of-frame. By following these dots one can see where Zapruder was aiming his camera. Presently the tracings are mostly for every fifth frame. Areas of particular interest are enclosed in red inset-frames.
There is a prominent downward zig-zag in Zapruder's camera pointing between frames 329 and 333.
See the refined Zapruder Stabilized Motion Panorama.(3) In it you can see where Zapruder begins to tilt his camera to about three degrees to the right as the limo moves out of view of the Stemmons freeway sign. It appears that Zapruder began using the roadway curb as his horizontal reference.
(2) Testimony of Abraham Zapruder, Hearings Before the President's Commission on the Assassination of President Kennedy (the Warren Commission) Volume VII, page 569.