DIRECTIONS FOR OPERATING FOLMER & SCHWING AERO CAMERA MODEL A FOLMER & SCHWING DEPARTMENT EASTMAN KODAK COMPANY ROCHESTER, N. Y., U. S. A.
DIRECTIONS FOR OPERATING FOLMER & SCHWING AERO CAMERA l\10DEL A FOLMER & SCHWING DEPARTMENT EASTMAN KODAK COMPANY ROC H ESTER, N. Y., U. S. A.
T HE F. & S. Aero Camera is handled in practically the same manner as a gun. Grasping the under support H of the camera, with one hand, and the pistol grip with the other hand, the instrument is aimed at the object by means of the front and rear gun sights SS. The exposure is made by pulling the trigger E with the index finger. The Graflex Focal Plane Shutter, built into the camera, consists of a long curtain with a number of fixed apertures of varying size.
speed of ·d ·, part of a second has been proven by actual test, to be sufficiently high to arrest motion when the Aeroplane is traveling at 80 or go miles per hour, at an elevation of 3500 feet. The lens fitted to the camera is unalterably set at a point that includes all objects located beyond 750 feet within the area of definition. The diaphragm system of the lens is conveniently controlled from outside the instrument by mea"RS of the dial and pointer D.
tain apertures, 1 7~ , numbers 1 to 6. %, ~ and 7E , and the tension THE CURTAIN A PERTURE The curtain contains fiv e ape\'tures ranging from "full opening " 0 to 7E of an inch . When the letter 0 appears at F the shutter is wide open. The other apertures 1 Yz, %, ~ , 7E follow in rotation at F as the key A is turned_to the left. SETTING THE SHUTTER The shutter is set by turning k ey A to the left until the required aperture is indicated at F.
M G B
F,release the curtain by pressing upward on the escapement M until the curtain aperture indicated on the Speed Plate for a certain exposure, is registered at F. REGULATING THE SHUTTER SPEED Tension on the curtain is regulated by turning the milled head B to the right until the required tension number appears at G. The numbers run from 1 to 6 - the highest number indicating the greatest speed.
of the lens, just before the shutter curtain is released. TIME EXPOSUHES Wind or release the curtain until 0 appears at F, and lower the tension to No.1. Rest the camera on a rigid support, pull the trigger E-full back, retaining in this position during the period of exposure. When pressure on trigger E is released, the front shutter will close, terminating the exposure. Immediately after the exposure is made, a new plate 01' film should be placed in position for the next exposure.
