Cinematographic annual : 1931 (1931)

Record Details:

Title:
Cinematographic annual : 1931
Date:
1931
Publisher:
Hollywood : The American Society of Cinematographers, Inc.
Volume:
Cinematographic annual : 1931
Leaf #:
000146
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Richard Koszarski","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
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114 CINEMATOGRAPHIC ANNUAL . „ ' <•' -v-. .""' • ti'-si .• * • ' • « ( ■5 * ■ o • * **. •>!';#v •v .. • <? * . . * « ta\ ". 9 .« 0 . O 0* 4 •ft'* . -a* t* •. # ( ° . f .,* \ . .« <* % « « 1 . ,» o* ■• # '. 6 * /) .a Fig. 7. Photomicrographs of the silver halide grains of Du Pont special (A) and regular (B) panchromatic negatives. Closely allied with the graininess of the emulsion is its resolving power. This was determined for both emulsions by photographing a test object consisting of groups of parallel lines. This object showed great contrast between its dense and transparent portions. 200 too so Grammes* Arbitrary Units DuPoNT Panchromatic Negative Special — O Regular— X Density 0 OS /0 /S Fig. 8. Density -graininess relation for both Du Pont panchromatic negatives. The development of the negatives was carried to a gamma of 0.8. Under these conditions the special and the regular negatives both resolved 38 to 41 lines per mm. References 1 Moyse. H. W., and White. D. R.: Trans. Soc. Mot. Pict. Eng.. XIII (May. 1929). No. 38. p. 445. Conklin, O. E.: J. Soc. Mot. Pict. Eng., XVI (February. 193 1) p. 159