Photographic Setup No. 1

Objective

To photograph objects moving at velocites exceeding 1000 feet per second during a strobe flash of 1/70,000 of a second.

Equipment

Camera:	Minolta 35mm single lens reflex.
Shutter Speed:	N/A. All lights are turned off and shutter is opened until after bullet is fired. The duration of the flash determines exposure time.
Lens:	35 mm/F 1.4 lens, protected with ultraviolet filter. A close-up tube was used to bring the camera within 4 inches of the center of the field.
Film:	Kodak Plus-X Pan Professional Film (B&W) ISO125
Flash Unit:	Honeywell Auto/Strobonar 360
	Flash Description and Specifications
	Test Results on Flash Unit (645K PDF document)
Flash Duration for Photographic Setup #1:	1/70,000 of a second.
Flash Placement:	Alongside lens tube on the left (see diagram below).
Backdrop:	White cardboard (important) set back 4.5 inches from line of bullet path.

Arrangement of Equipment

Trigger Circuit

Trigger: The strobonar shutter cord is spliced and lengthened with an electric wire, leaving the two ends loose. One end is tied to a ground post while one strand of the other end is stretched above the post in the path of the bullet. This strand is then knocked down against the post as the bullet passes, completing the circuit and triggering the flash.

Leap Back to Photographic Demonstration of the Atomic Moment

Leap Back to Photographic Demonstration of Specific Simultaneity

Leap to Photographic Setup No. 2

Leap to Table of Contents

Leap Home