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The Outlook
In this column it is our intention to discuss from time to time current problems and future possibilities concerning the development of motion picture technic, with special reference to the part which the Agfa Ansco Corporation by means of its research facilities plays, or intends to take.
We remind the reader of the principal purpose of our publication as stated in the recent introductory article of the first issue, that, is to place special emphasis on the importance of mutual cooperation between the film manufacturer and his experimental aids on one side, and the motion picture producer and his practical experts on the other.
A modern manufacturer knows that it is not sufficient to deliver merchandise of standard quality, but he must also be fully awake to all problems of his prospective customers, and be willing to lend his help in solving them.
It is for this reason that Agfa Ansco sustains the rather expensive maintenance of experimental laboratories which work independently from production, and similarly employs technicians on the W est Coast and in the East who serve mainly as impartial interpreters of all matters of interest between the practical field and the factory.
So that this service will be fully utilized, we invite the reader to study this column carefully and to communicate with us if any of the items discussed should interest him particularly.
Photographing Night Effects in Daytime With Overcast Sky or Backlight.
The impression of a true night effect, conceived by viewing photographs taken on Infra-Red film, becomes particularly realistic in all scenes where the sky is a part of the photograph. A clear blue sky is rendered practically black in a print from an Infra-Red negative which has been exposed with a blueabsorbing filter, for the reason that blue sky does not reflect any rays to which this emulsion type after filtering is sensitive.
An overcast sky, however, reflects a substantial amount of red radiation, which makes it impossible to obtain a true night effect with filters in use at present, in case such sky conditions prevail. The same holds true when photographing a blue sky against the sun or with backlight.
This represents an occasional limitation and hampers the possibility of generally applying the technic of photographing night effects in the daytime. There is reason, however, to believe that a special filter combination might be worked out which would make it possible to overcome this obstacle, although practical application might show that the transmission of such a filter is possibly too low to permit sufficient exposure.
If promising results are obtained from experiments now underway, a detailed account of methods, etc., will be published in a future issue. Panchromatic Negative Emulsion Combining Maximum Speed with Absence of Graininess.
This represents one of the oldest problems of any film manufacturer, and Agfa Ansco has participated with others in attempting to solve it ever since
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