Richardson's handbook of projection (1927)

Record Details:

Title:
Richardson's handbook of projection
Date:
1927
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000500
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
September 28, 2023
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948 HANDBOOK OF PROJECTION FOR the slide carriers are of proper focal length to project a light beam about the size of a motion picture screen. When it is desired to flood the stage or orchestra pit the shorter focal length lens is swung into position, while the longer focal length lenses are thrown out of the light beam, or vice versa if it is desired to project slides. By means of the two focal lengths of projection lens, the iris aperture controlling shutters, the framing shutters and the Figure 372 REAR VIEW OF THE DUAL FOCUS PROJECTION LENSES "A" — Front or long focus projection lenses in position ready to project moving scenic effects, moving color effects, or slides on to the motion picture screen. "B" — Rear or short focus lenses swung out of position. "C" — Fine focu&sing adjustment for either the long or short focus lenses. NOTE — Both dissolving shutters are now open for projecting from both lower and upper unit simultaneously with either two color effects or two scenic effects.