A condensed course in motion picture photography ([1920])

Record Details:

Title:
A condensed course in motion picture photography
Date:
[1920]
Author:
New York Institute of Photography
Publisher:
New York, New York Inst. of Photography
Volume:
A condensed course in motion picture photography
Leaf #:
00073
Language:
English
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
14
Date Added:
July 19, 2022
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

MOTION PICTURE PHOTOGRAPHY out of focus, necessitating the withdrawal of the ground glass from the lens before the image will assume its maximum sharpness. This establishes the fact that there exists a relation between the object that is focused, as regards its distance from the camera, and the focus of the lens. This relation is termed "conjugate foci." Foci is the plural of focus; conjugate means combined in pairs ; kindred in meaning and origin. Conjugate foci are then the distances from the lens to the image and from the Fig. 23. Nodal point outside the lens. lens to the object. Hereafter we will speak of the distance between the lens and the object as the anterior or major conjugate, and that existing between the lens and the ground glass of the camera, as the posterior or minor conjugate focus. Parallel rays aa — ^that is, rays from a great distance — falling upon a lens come to a focus at f ; but those from b, which may serve to represent any object ten or twenty yards distant, have their focus at c (Fig. 24). Then fo is the solar focus, bo and co are conjugate foci. The former of these is the anterior, and the latter the posterior conjugate. To facilitate reference, the lines indicating the conjugate foci are solid, while those relating to the solar focus 60