Proceedings of the British Kinematograph Society (1936)

Page scan 0008 from Proceedings of the British Kinematograph Society

Record Details:

Title:
Proceedings of the British Kinematograph Society
Date:
1936
Publisher:
British Kinematograph Society
Volume:
Proceedings of the British Kinematograph Society #42: The General Requirements for Photographic Lighting (1936)
Leaf #:
0008
Language:
English
Contributor:
David Bordwell
Sponsor:
David Bordwell
Coordinator:
Media History Digital Library
Date Added:
September 15, 2023
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Tur Autor: We take a bi-plane and reconstruct it to get what is not exactly a point source but a square source. You will find that in the studios they will burn a lamp the way they like instead of the way they should—(laughter)—with the result that the upper filament gets heated by the coils of the lower one and they burn out. The general source we now make is a monoplane filament used with a spherical] mirror. Mr. Jonxn New: Can I ask whether in colour photography the broadside and overhead fittings are equipped with general service lamps of 1,000-hour rating, such as are used in house lighting? THe Avurnor: Any incandescent lamps used for colour photography, either in conjunction with arc lamps, or alone, must all be designed for the same lumen per watt efficiency. General service lamps of 1,000-hour rating will be useless. Where it has been necessary to use equip ment which was designed for the general service lamps we have used a 2,000-watt photo flood in the PS 52 bulb which has a life rating of approximately 18 hours. Mr. Geary: The author has said he was referring to one colour process, but is it not in the main the same for all colour systems ? Tur Auruor: Very likely, yes. Mr. Pererra: One thing which puzzles me in the sphere of lighting for colour photography is the sudden change sometimes observed in the complexion of a charming lady, which transforms her for a few moments into the likeness of a Red Indian. Tur AvtHor: With regard to the question of faults in colour films raised by Mr. Pereira, they must be duc to a combination of bad equipment and lack of knowledge, for which we must take the blame, and trust we may before long be able to correct these faults. 3 Published by the BRITISH KINEMATOGRAPH SOCIETY, and Printed by FLEETWAY PRESS LEDs 11-21 Emerald Street, W.C.1