received calibrated. It is calibrated to a predetermined
focusing system for accurately positioning the lensboard
and copyboard for any ratio of enlargement or reduction
over the specified ranges for lenses furnished. Each
lens is accompanied by focusing charts providing easily
legible counter readings for each percentage of reduction
and enlargement over the range of reproduction.
Calibrating the camera to the lens is the
responsibility of the field and depot maintenance. Under
no circumstance should the operator attempt to
calibrate, or adjust camera equipment affecting the initial
2-2. Used Equipment
a. General. If a used camera is received in a
crate, it should be unloaded, uncrated, inspected,
assembled, and put in operational condition in
During inspection procedures,
check carefully for missing, broken, bent or worn parts.
Check the bellows assembly for cracks and tears in the
c. Service. Service the camera as detailed in
Figure 2-8. Darkroom connecting frame,
Section II. MOVEMENT TO A NEW WORKSITE
loose items into the lens storage box (3, fig. 2-5), and
2-3. Dismantling for Movement
fasten this box securely to lensboard carriage base plate.
a. Disconnecting and Shutting Down the Unit.
(4) Set arc lamps in sockets in center of arm
(1) Disconnect external power source cable
in place of the carbons, and lock the carbon holders
from the camera and the plug from the transparency
together so that they will not be subject to shock in
holder. Be certain that all switches are in neutral or OFF
transit. Move arm brackets parallel with axis of camera.
Move lensboard forward by turning the lensboard fine
(2) Remove lens from lensboard and place it
adjustment handwheel until the holding stud and locknut
in the lens box.
(3) Place lens boxes, ratio charts, and other