TM 11-6720-248-12
C1
CHAPTER 3
OPERATING INSTRUCTIONS
Section I. OPERATION UNDER USUAL CONDITIONS
3-1. General
3-2. Controls and Indicators
a. Lens and Shutter Assembly and Camera
The number of subjects to be photographed in a certain
Controls.
length of time and the type of film (color or black-and-
white) to be used are the main determining factors in
Controls
Function
selecting the proper mode of operation.
Release button (fig. 3-1)
Actuates shutter release
a. Use of black-and-white film (type 107) requires
lever.
the use of the neutral density filter over the front lens of
Diaphragm control lever
Sets size of diaphragm
the lens and shutter assembly, and the mask over the
opening.
strobe assembly. Develop ment time of the film is
Shutter release lever
Opens and closes shutter.
affected by temperature; the chart below gives
Shutter speed control
approximate
development
times
at
different
ring
Sets shutter speed.
temperatures.
Back cover latch
Secures
back
cover
Temperature ()
assembly to camera back
assembly.
Fahrenheit
Centigrade
Time (seconds)
b. Strobe Control and Indicator (fig. 3-4).
75
24
10
Control or indicator
Function
70
21
15
Pos
Action
Power Switch
65
18
20
B
Battery operation.
60
16
25
A
Ac operation.
50
10
30 to 40
C
Battery charge.
40
5
45 to 55
Neon indicator
Signifies readiness of strobe.
35
1.5
55 to 70
c. Model 700 Strobe Control and Indicator (Fig.
b. Use of color film (type 108) requires a longer
interval between exposures to allow time for the color
Control or indicator
Pos
Function
film to be developed. Development time is affected by
Power Switch
On
Battery
temperature; the chart below gives approximate
operation
development times at different temperatures.
Temperature ()
Battery/ac operation
Off
Ac oper. during stor.
Fahrenheit
Centigrade
Time (seconds)
Charge in-unit batt.
75
24
60
Neon indicator
Strobe readiness
70
21
70
Open flash switch
Flashes strobe
65
18
90
3-3. Preliminary Procedures
c. The proper mode of operation of the strobe
a. Assemble and interconnect-camera set (para
assemblies can be determined by considering the
following:
b. Loosen the telescope clamp screw on the tripod
(1) During battery operation, the strobe
assembly may be flashed approximately 80 times before
positioning bar is directly over the tripod leg that is
it is necessary to recharge the batteries; the minimum
nearest the leg hinge clamp screw.
Tighten the
time interval between flashes is 8 to 15 seconds.
telescope clamp screw.
c. Remove the lens cap from the lens and shutter
(2) During ac operation, the minimum time
assembly. Remove dust from the front lens assembly
interval between flashes is 25 seconds.
with a hand blower, and gently wipe the front lens
element with a clean lens tissue moistened with lens
(3) During ac operation, the strobe assembly
cleaner.
can be flashed as many times as (2) above will allow.
d. Operate the back cover latch toward the camera
assembly pivot point and open the back cover assembly
remove and discard it.
e. Remove dust from the rear lens element and
interior of the camera with a hand blower. Clean the
rollers with a cloth moistened with water.
3-1
