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450 HIGH-SPEED PHOTOGRAPHY
Industrial Timer Corporation, Newark, New Jersey, and has built into it a timing circuit which allows the Fastax Camera to be increased in speed over 40 per cent. The camera is started off at 130 volts and 70 milliseconds later voltages up to 280 can be applied to the motors. The running time of the film is reduced to 0.8 of a second. There is a timer associated with the camera circuit which allows the camera to be set at operating times up to 6 seconds. Associated with the control unit is an event timer which allows the event to be either started or stopped at any predetermined time up to 6 seconds either ahead of, simultaneously with, or after the camera has started. This unit increases the flexibility of the camera tremendously and is now currently available.
The Eastman and Fastax cameras have mounting holes provided in their bases for attaching the cameras to standard motion picture tripods. The cameras are heavy enough to require a reasonably heavy tripod and the Mitchell, Bell, Howell, and Akeley tripods as well as others of that type are satisfactory. For laboratory usage a drillpress stand with a tilt-top table can be used quit satisfactorily.
Many times it is necessary to reduce the heat of the lamps on the subject which is being photographed, therefore, either of two schemes can be used. Aklo heat-absorbing glass can be put between the light and the subject or a water cell can be used in the same position. The Aklo heat-absorbing glass is obtainable either from the Corning Glass Works or from the Libbey-0 wens-Ford Glass Company. Water cells which are made from glass, rubber seals, and metal housings are rather expensive to design and to seal properly. There is a small flask available which can be used quite advantageously and that is a Pyrex Kolle culture flask. The diameter of this flask is 135 mm and the outside distance between the flat walls is 35 mm. This flask is portable and can be easily filled just prior to use.
With the above brief description on how to use the high-speed camera the committee has attempted to bring the users up to date on the latest developments in the field of high-speed photography in order to make it more generally useful.