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A Faster Film for the Still Man
By GRANT W. HOUGH
Agfa-Ansco Corporation, Pacific Coast Technical Division
WITH negative materials of such greatly increased speed as Agfa Supreme and Agfa Ultra Speed Pan films available to the cinematographer, the studio "still man" is obviously in need of a comparably fast emulsion upon which to make his stills. This need is now met with the introduction by the Agfa Ansco Corporation of a new and surprisingly fast cut film known as Agfa Superpan Press.
This new emulsion has a speed equal to that of the new Ultra Speed Pan motion picture negative film. It is four times greater than the speeds of emulsions heretofore rated as "maximum speed" plates or films, and approximately double the speed of even the new Agfa Supreme motion picture negative film.
This tremendous increase in speed has not, however been secured at any sacrifice of other qualities desirable in a fine film. It must be emphasized that Agfa Superpan Press film is in no sense a hypersensitized emulsion. The increased speed is gained through an entirely new emulsion making technique. Agfa Superpan Press film is not, therefore, limited by the restrictions as to storage, keeping quality, etc., generally applicable to hypersensitized film. Its keeping quality is equal to that of any existing superpan type emulsion, and it may therefore be stored in the usual manner.
Superpan Press film is capable of producing brilliant results when exposure is limited, and will also preserve brilliance if the film is underexposed. Tests made by local photographers have indicated that printable negatives have been secured on the new emulsion within an exposure range of nearly fifteen to one between minimum and maximum exposures (see illustrations).
Color Sensitivity:
Superpan Press film has practically the same color sensitivity as Superpan Portrait film, which is familiar throughout the industry. It is therefore a truly panchromatic emulsion. Its normal high sensitivity to red and orange light make it especially useful under the incandescent lighting used in motion pictures. The new emulsion reacts normally when used with color filters. The daylight exposing factors for several standard filters when used with this new film are as follows:
K-l 1.8 23-A 3.5
K-2 2.0 25-A 5.0
Aero I 1.5 F 7.0
Aero 2 2.0 N.D. .25 1.8
3-N-5 4.0 N.D. .50 3.1
5-N-5 6.0 N.D. .75 5.6
G 2.5 N.D. 1.00 10.0
Due to the extreme speed of the emulsion, still photographers must be
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