The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular (1877)

Record Details:

Title:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Date:
1877
Publisher:
Philadelphia, J. A. Moore
Volume:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Leaf #:
00071
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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62 SCIOPTICON MANUAL. exposed in the camera, carried into the dark-room, and developed, fixed, and toned. If many positives are to be made from negatives of different sizes, it will be found convenient to arrange two cameras front to front (as will be seen in Fig. 23), . 23. one camera having a lens in position with ground-glass No. 1 ; the other having the lens and ground-glass re- moved, and the negative that is to be copied placed in the position of ground-glass No. 3. The cameras, for convenience, can be closely joined together by screwing strips of wood upon each, which prevents any change of position when focused. By turning the rack-work upon each box, the picture upon the ground-glass can be made of any size. This plan of using two boxes will be found to give perfect satisfaction; the negative and sensitive plates are always on the same plane, and the adjustment for difference of size made in a moment. It is only for convenience of manipulation, that the writer advocates this arrangement, for excellent positives can be obtained by using one camera, and placing the negative to be