Servicing projection equipment (1932)

Page scan 000141 from Servicing projection equipment

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
000141
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:
August 15, 2024
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STEREOPTICON TROUBLES 125 to both of the lenses. First, as it just has been described; and second, by going through the same process and substituting the lower lens in place of the upper lens. ( c ) — The failure of the pictures to register properly may also be due to the fact that the elements of the device, either the upper or the lower one, may be out of "true." To test this condition note whether the picture, projected from the top element, is matched exactly by the picture projected from the lower element when the top lens has been substituted in the lower mount in place of the lower lens. If the pictures do not match, and you are sure that the standard slide used in both elements has not shifted, then the lower element of the device is off "true." Test the upper element in the same manner and, if possible, readjust the elements until the register is perfect. However, this should be done only when it is known that no damage has occurred during the transportation or the unpacking of the device. (d) — The slide carriers of the two devices may be out of perfect "true," causing even the same slide and the same lens not to give a correct register in both of the elements. If the slide carriers are adjustable, experiment with them and, if possible, block up the one least in condition. Always use the