File:The American annual of photography (1922) (14801398673).jpg

Identifier: americanannualof36newy (find matches)
Title: The American annual of photography
Year: 1922 (1920s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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atus (stereoscope) should beof approximately the same focal length as the lenses in thecamera. Thus, the old-fashioned American stereoscope madefor the 3^ X 7 size, is not mxost suitable for the li.tle 45 x 107millimetres views which are taken with lenses of about 2^inches focal length. Paper prints are the commonest form of stereoscopicphotographs. Glossy paper is preferable because it showsfine detail the best. Transparencies on glass (similar tolantern-slides) are more effective than paper prints—they willshow even finer detail, and because the light shines throughthem instead of merely on the surface, there is a sparkle andbrilliancy impossible to attain in a paper print. Autochromes,which are glass transparencies in natural colors, are the mosteffective of all stereographs, and a well-done stereoscopicAutochrome viewed through the proper sort of stereoscopeis almost as good as looking at the scene itself; even better,perhaps, in a sense, because you can study every detail at 42
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u WHHW QO 43 leisure of what in the actual scene was but a fleetingimpression. Certain rules have to be observed in stereoscopic photog-raphy. The camera has to be level, from left to right. Itmay be pointed up or down a little, at the risk of distortingvertical lines, without harming the stereoscopic effect. Butthe top of the camera must not incline to left or right. Ifit does, the resulting stereograph will be an eye-twister.It will hurt your eyes trying to look at it through thestereoscope. Paper prints may be trimmed to make thecrooked straight, but correction is possible only to a verylimited degree in the case of transparencies on glass. As you look at a stereoscopic negative so that the pictureis right side up—and right is right, and left is left—theindividual negative at the left is that which was exposedthrough the right-hand lens of the camera, and vice versa.Therefore, if a print is made from the entire negative, witha single exposure, the print will have to be cut in t

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