COAST. I ARTILLERY JOURNAL, - Air Defense Artillery

UXIVERSAL MEASURIXG CA)IERA 437
The camera base (1) supports two parts, (6) and (14), which
form the real camera obsc/lra of the camera, as well as all other parts
of the construction needed for measuring.
The forward partition (6) carries the object glass (7) of the camera
in a trough.like depression, from which the entering light is diverted
by a mirror (8) set fast to the wall (14). The object glass is held in
Fig. 4
its casing with specially designed distance rings with screws (9). These
distance rings can be exchanged in order to permit the camera to be
med for measuring gun recoil. "Then one uses the lowest distance ring
the camera is set for infinity in which position it is used for projectile
measurements, while the strongest distance ring permits exposures at a
distance of 1.5 meters from the objective.
The object-glass is provided with a quick-acting shut-off which is
tightened before measurement and opened by means of a special contact
device on the gun by an electric release (12). By that the shut-off
is so arranged that the open time interval corresponds to the time which
the film drum (16) (to be described later) requires to make one
revolution.