LESSON 3
PHOTOGRAPHY IN COLD CLIMATES
TASK
Describe the operation and protection of camera and laboratory equipment in cold climates.
CONDITIONS
Given information and diagrams about procedures for operating and protecting photographic equipment in cold
climates.
STANDARDS
Demonstrate competency of the task skills and knowledge by correctly responding to 80 percent of the multiple-
choice test covering photography in cold climates.
REFERENCES
TM 11-401
TM 11-401-1
TM 11-401-2
TM 11-6720-253-10
TM 11-6720-265-12
Learning Event 1:
DESCRIBE THE DIFFICULTIES OF PHOTOGRAPHY IN COLD CLIMATES
1.
In cold climates difficult operation of still cameras is usually associated with shutters and lenses. If a
camera is properly lubricated and adjusted in cold temperatures, it will function if certain procedures are
followed.
a. Shutters slow down in cold weather. Very cold temperatures will also reduce film sensitivity. On
average, depending on the camera you are using, one half to one f/stop less light is required to compensate for
slower shutter speeds. For example, if your basic exposure is 1/125 second at f/16, you should set your f/stop to
f/22 to compensate for the slower shutter speed. This will require some testing to arrive at the right amount of
change. The colder the temperature, the slower the shutter.
b. Focal plane shutters found on 35mm single lens reflex (SLR) cameras are made of cloth or
rubberized cloth. These become brittle and can break if they become too cold. Keeping the camera warm is the
best method of reducing this problem.
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