LESSON 1
DETERMINE PHOTOGRAPHIC EXPOSURE
TASK
Identify the procedures and techniques of determining photographic exposure.
CONDITIONS
Given information and diagrams pertaining to the calculation of photographic
exposure.
STANDARD
Demonstrate competency of the task skills and knowledge by correctly
responding to a minimum of 80 percent of the multiple-choice test covering
the determination of photographic exposures.
REFERENCES
TM 11-401-1
Learning Event 1:
DESCRIBE THE THEORY OF EXPOSURE AND EXPLAIN THE SIGNIFICANCE OF THE EXPOSURE
FORMULA
1.
When light strikes a piece of film a latent image (invisible image) is
formed. This image is called "latent" because it cannot be seen in the film
until it is "developed" by treating the film with special chemicals.
The
action of development causes the latent image to become visible in
proportion to how much light struck the film in the first place.
Those
parts of the film which received a great deal of light darken considerably,
while those struck by relatively little light darken only slightly.
The
striking of film by light is called "exposure" (fig 1-1).
Figure 1-1.
The photographic process
1
Previous Page
