26-10-2012, 10:28 AM
http://www.copweb.be/Zapruder Camera.htm
In various discussions it is said though Zapruder's was single-shot, 16fps or 48fps, at the time, the industry was moving to 18fps; further, it is stated FBI tested Zapruder's spring-wound camera and found it to operate at an average of 18fps.
Your hypothesis that Zapruder may have operated at 48fps allowing ample material to modify as required seems sound.
In Assassination Science, 1998, The Case for Zapruder Film Tampering: The Blink Pattern, Mike Pincher and Roy L. Schaeffer state their pattern on page 227:
The [limousine] emergency light pulse rate was a constant one established at .41 seconds by an electronic flip-flop switch installed into the electrical circuitry. At 18fps, if unaltered, the Zapruder film would feature the emergency light pulse occupying about seven frames per side. Using the Robert Hughes film, these durations were calculated by observing the limousine as it approached the intersection of Main and Houston streets.
. . .
However, the Zapruder film emergency light blinking pattern lacks this consistency. By examining the blink pattern from Z-133 to Z-181, it is clear that more than seven frames are seen in the pattern, indicating a faster speed than 18fps.
. . .
[The article authors provide Enclosures 4-A, 4-B, 4-C, presenting their findings in four paragraphs and two charts.]
Enclosure 4-A page 236 excerpted:
Because Zapruder's camera only had two settings: 16 and 48 fps, and the blink rate was more than seven continuous flashes per side, the film in Zapruder's camera had to run at a faster setting than 18.3 fps. By closely examining the blink rate chart from Z-133-238 the altered film appears to fluctuate between 12 to 24 fps.
~~~
As analysis shows the limousine to roll at eleven mph while Palamara's 59 describe dramatic departure from that constant, QED frames have been excised.
~~~
Here is a useful exposition from assassinationresearch.com titled Altering the Zapruder Film:
http://www.assassinationresearch.com/v1n1/healy7.html
In various discussions it is said though Zapruder's was single-shot, 16fps or 48fps, at the time, the industry was moving to 18fps; further, it is stated FBI tested Zapruder's spring-wound camera and found it to operate at an average of 18fps.
Your hypothesis that Zapruder may have operated at 48fps allowing ample material to modify as required seems sound.
In Assassination Science, 1998, The Case for Zapruder Film Tampering: The Blink Pattern, Mike Pincher and Roy L. Schaeffer state their pattern on page 227:
The [limousine] emergency light pulse rate was a constant one established at .41 seconds by an electronic flip-flop switch installed into the electrical circuitry. At 18fps, if unaltered, the Zapruder film would feature the emergency light pulse occupying about seven frames per side. Using the Robert Hughes film, these durations were calculated by observing the limousine as it approached the intersection of Main and Houston streets.
. . .
However, the Zapruder film emergency light blinking pattern lacks this consistency. By examining the blink pattern from Z-133 to Z-181, it is clear that more than seven frames are seen in the pattern, indicating a faster speed than 18fps.
. . .
[The article authors provide Enclosures 4-A, 4-B, 4-C, presenting their findings in four paragraphs and two charts.]
Enclosure 4-A page 236 excerpted:
Because Zapruder's camera only had two settings: 16 and 48 fps, and the blink rate was more than seven continuous flashes per side, the film in Zapruder's camera had to run at a faster setting than 18.3 fps. By closely examining the blink rate chart from Z-133-238 the altered film appears to fluctuate between 12 to 24 fps.
~~~
As analysis shows the limousine to roll at eleven mph while Palamara's 59 describe dramatic departure from that constant, QED frames have been excised.
~~~
Here is a useful exposition from assassinationresearch.com titled Altering the Zapruder Film:
http://www.assassinationresearch.com/v1n1/healy7.html