International photographer (Jan-Dec 1934)

Maw 1934 T h INTERNATIONAL PHOTOGRAPH IK Thirty one CONTROLLED REFLECTION By Milton Moore The art of cinematography has advanced in the past three years through a startling evolution. Screen results of today are undeniably far superior to any results heretofore obtained. Art now as always is dependent upon science to produce the perfect medium of expression. Eastman, Dupont, Agfa have given us a film almost perfect in monochrome reproduction. Bell & Howell and Mitchell have given us the cameras ; Bausch & Lomb, Zeiss, Cooke, Astro have contributed the optical units; Mazda and National Carbon the lights. With all of these perfected elements at his command the artist cinematographer is able to reproduce on the screen a picture which varies but slightly from the one he has painted with light in front of his camera. Until recently scant attention has been given to the science of controlled reflection of sunlight. The cinematographer has continued to use the aluminum paint and "gold" type of reflector which was designed for use with the old "Ortho" and old "pan" negative stock. At the request of Silas Snyder, editor of The International Photographer, the writer recently carried out a series of practical experiments with the new Helio-lite reflectors. The reflectors were used in research work of a highly technical nature, under conditions and requirements which demanded the utmost efficiency of all contributing elements. These reflectors were used in color photography where a normal requirement of volume and intensity by reflection were indicated. Results gave definite evidence of the inventor's claim that Helio-lite reflectors reflect the solar spectrum with unusual fidelityPrinted colors, closely, approximating the solar spectrum, when illuminated by reflection only, reproduced in the same bands as the same colors photographed in direct sunlight. The importance of full scale reflection in color photography can scarcely be over-emphasized. It is sufficiently apparent in the exquisite results obtained to be truly a controlling factor in exact color reproduction. In black and white research the reflectors showed a like efficiency. The panchromatic film color sensitivity characteristics no longer require the use of a "gold" reflector to build up exposure, by intensifying that partciular wave length in reflection. It has been proven in the experiments conducted under exacting requirements and by several thousand feet of exposed negative that the full wave band reflectors produce a picture of the proper high light and shadow balance and rich in tone values in the softly illuminated shadows. A minimum volume of reflected light only is required. Since all color values are actinic to the present pan film, it is B e autif ul Indoor Photography EASY AND INEXPENSIVE WITH THE LEICA CAMERA AND THE NEW SUMMAR 50 mm. F:2 SPEED LENS No longer need you neglect this most delightful field of photography — the making of pictures at home. LEICA has stripped it of all mystery, guess-work and costliness. LEICA'S new Summar 50 mm. f:2 Speed Lens combines high speed with amazing clarity and accuracy. It gives you sharp pictures without costly lighting equipment. Built-in Range-Finder coupled with lens gives you correct focus instantly. Focal Plane Shutter gives you speeds from 1 to 1/S00th second. 11 Interchangeable Lenses (including telephoto, wide angle, etc.) adapt the LEICA to all kinds of photographic work. LEICA photos made by Clarence Slifcr, Hollywood, SUMMAR f.-B lens wide open, l/20th second exposure. Booklet. Write for free sample copy of LEICA PHOTOGRAPHY (only monthly magazine devoted exclusively to LEICA pictures, regularly $1.00 a year. Free to registered LEICA owners). E. LEITZ, Inc. DEPT. 512 60 East 10th Street New York Western Agents: Spindler £r Sauppe, San Francisco and Los Angeles, Calif. Model F with f:2 SUMMAR Lens not necessary nor desirable to produce normal exposure in one color band only, rather it is desirable to use the least intensity and the greatest diffusion possible in order to produce the soft shadow transparency necessary to secure the cameo-like close-up. In the hands of the amateur 16 mm. cinematographer, the Helio-lites should prove a source of much pleasure, in the professional like results he may obtain. He need illuminate only the shadow side of the subjects to the brilliancy which the eye finds pleasing. He need not "allow" anything for imperfect reflection. This rule applies of course to film having a panchromatic color sensitivity characteristic. The inventor of Helio-lite reflectors did not by accident discover the new substance with which the reflectors are coated. The material is the result of research entered into for the express purpose of producing such a medium. Mr. John Q. Roscoe, member of the famous family in scientific research, is responsible for the Helio-lite development. The results obtained are thoroughly substantiated by spectrum analysis and other scientific tests. Please mention The International Photographer when corresponding with advertisers.