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ing the cameraman with too much data until he had familiarized himself with this product.
Incidentally, Mr. Walker, in testing the Agfa Infra-Red film, noted the extreme fineness of grain which encouraged him to compare this film type in its adaptability as duplicating negative material. The results, although of no practical consequence, showed the Infra-Red type to be as fine in grain size as orthochromatic emulsions which are used for this purpose.
In connection with the above report, we would like to answer here a question we frequently have been asked by cameramen: "What makes the
result of an artificial night shot, photographed in daytime on Infra-Red film, look superior to one photographed on panchromatic type under identical conditions?"
We believe the correct answer to be as follows:
Using a panchromatic type with, for instance, light-red filters such as 23A or 29F will result in an overcorrection of color values, but not sufficiently so to deliver a complete night effect. It, therefore, becomes necessary, in addition to the filter, to underexpose this type material which, however, will produce a distorted negative record, wherein the major part is necessarily registered in the toe-section of the characteristic curve. Correspondingly, the resulting print will be flat and show insufficient separation of density values.
Using an Infra-Red type, such as the new Agfa type B which has an inherent contrast practically equal to that of current panchromatic emulsions, the exposure through a light-red filter already renders a full night correction, so that it is possible to place the negative record in the straight-line portion of the characteristic curve, thus fully preserving the quality of an undistorted reproduction.
A SUGGESTION received from one of our readers expressed the desire that this magazine be provided with some means of binding copies together for future reference. We intend to comply with this suggestion by supplying every reader with a suitable binder at the end of each year.
We are gratefully obliged to Mr. H. R. Champlin for his pictorial contributions to this issue of "Agfa Motion Picture Topics." Mr. Champlin is not only an outstanding protographer, who has quite frequently demonstrated his preference for Agfa Ansco products, but is also widely known for his most active interest and research wrok in miniature photography and fiine-grain development.
AGFA MOTION PICTU
RE TOPICS
Published by C. King Charney,
Inc.
6372 Santa Monica Boulevard, Hollywood, California
HOIlywood 29 1 8
Editor, H. Meyer
C. King Charney, Inc., is not responsible for statements
made by authors or for
unsolicited manuscripts.
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