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unless the final wash water is acid instead of neutral or slightly alkaline. In this case, if the film retains any slight stain, it can be removed by rinsing for two or three minutes in water containing a few drops of ammonia ,or in a 5% solution of potassium metabisulphite.
Practical Use
The practical advantages of this film for the use of the motion picture still man will be obvious. Using it on the set, its superior speed will give the still man a much-needed advantage in working with motion picture lightings. In the majority of instances, he will be enabled to reduce the aperture of his lens considerably, thereby gaining better definition and depth of focus more nearly comparable to that given by the cinematographer's shorter-focus lens. He will also be able to use shorter exposures, thereby reducing the danger of moves on the part of the actors.
In addition, the new film opens up a completely new field of genuine action stills. Using ordinary apertures, the speed of Superpan Press film will permit the still man to use exposures fast enough to stop most normal action. With a reasonably silent shutter, such action stills could well be made during rehearsals, without interrupting the action.
When using photoflash globes for normal flash work, the smallest size flash bulb (No. 10) should be used, and the lens set one full stop smaller than usual. The larger globes and stops now considered standard for close flash shots with ordinary films can with Superpan Press film be employed for long shots, and for synchronized speed flashes where high shutter speeds are necessary to arrest fast motion.
The full possibilities which Superpan Press film offers in studio still work can hardly be outlined as yet. These possibilities await the revealing experience of practical still photographers engaged in actual production. Such experience is now being amassed in tests and production use of the new product in several studios, and the results will in due time be reported in these pages. It is certain, however, that this new and surpassingly fast emulsion will enable the studio still man to obtain a new and welcome means of getting his stills more quickly, more easily, and more effectively.
OUR ILLUSTRATIONS
Our illustrations this month include three photographs from the camera of Dr. Ernst Schwarz, President of the Agfa-Ansco Corporation. According to reports reaching us from New York, a larger collection of Dr. Schwarz' recent photographs has been published in book form, under the title "Pictorial America." In common with Dr. Schwarz' many friends throughout the motion picture industry, we await with considerable anticipation the appearance of this volume, which will certainly take a high place among the major photographic works of 1938.
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