We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
Twenty-two
AMERICAN CINEMATOGRAPHER
December, 1926
CINOPHOT
The Automatic Exposure Meter for the Movie Camera
Patented by Dr. Emil Mayer
S^J^
Automatic — scientifically exact under all light conditions. Gives correct diaphragm settings for sun and twilight, outdoors, studio, natural or artifical light. Adjustable for individual vision. Always ready for use.
The CINOPHOT saves film waste and disappointment. Price in fine sole leather case.
$12^2
Chas. G. Willoughby, inc.
110 West 32nd Street
New York, N. Y.
E. Burton Steene
Freelance Akeley
and Eyemo
Camera Specialist
Care of American Society of Cinematographers
1219-20-21-22 Guaranty Bldg.
HOLLYWOOD, CALIF.
GRanite 4 2 7 4
CRECO
teristics of an emulsion are greatly changed if a dye that absorbs the wave lengths of light to which the emulsion is sensitive is mixed with the gelatin. In the case of an ordinary emulsion certain yellow dyes have this property. The addition of the dye has the effect of increasing the resolving power by reducing irradiation or scatter, greatly extending the latitude, and lowering the maximum contrast of the emulsion. By so "doctoring" a very fine grained emulsion, a film was produced which possessed in a marked degree every desired property with the possible exception of speed. The speedy unfortunately, is rather low, being only about one-twentieth that of regular positive film. However, by using a suitable condenser system, sufficient illumination to print from dense negatives at the usual step printer rate can easily be obtained. It is practicable also to do projection printing with condenser illumination.
The dye used is a water soluble yellow that washes out during, the processing operations and leaves a normal appearing black and white film. The emulsion keeps extremely well and can be handled in the usual positive safelight.
The use of this film, known as "Eastman Duplicating Film," for both master positive and duplicate negative, insures excellent tone reproduction, freedom from development defects, and a minimum of graininess.
Tuning The first step in the actual process of making the duplicate is the timing of the original negative for printing. The exposure for each scene should be such as to clearly record the details in the highlights. The exposure should not be much greater, however, than that necessary to secure the lightest detail; otherwise, the graininess of the final print will be accentuated. After the original has been timed, it should be carefully cleaned to remove all traces of dirt from any scratches that may be present on the gelatin or support. Chamois skin moistened with carbon tetrachloride may be used for the purpose.
!!:
en
be
an sin
(Continued Next Month)