File:The American annual of photography (1912) (14742966636).jpg

Identifier: americanannualof1912newy (find matches)
Title: The American annual of photography
Year: 1912 (1910s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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ts are usually to be traced). Theslide should be bound up with a cover glass in front and aground glass backing with a black paper mask in between;thus we have three glasses in the finished slide. But by farthe best method of printing transparencies is by a speciallymade though inexpensive copying camera provided with avery simple adjustable lens front in which the ordinary stereo-scopic lenses may be used, and if a paper mask, such as is tobe used when binding up the slide, be attached to the focus-ing screen of the copying camera, we are able to see and 293 adjust the centers before making the exposure, and if thenegative be copied through its own glass, the cover glass infront is dispensed with, for the transparency is viewed throughits own glass and all that is necessary is a ground-glass back-ing, thus only two glasses are employed instead of three as incontact printing. Amongst my collection of photographs—mostly holidayreminiscences—I have several albums and folios of paper
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Fig. 1. prints, some of which are made from one side of my stereo-scopic negative—these latter I hand to a friend. They arelooked over for a short time, quickly turned over with ,afew casual and complimentary remarks, Yes, very nice;pretty little picture this, etc., and perhaps fifty prints arefinished within practically a few minutes. After a little time 294 I show the same friend a few stereoscopic transparencies,by a properly constructed stereoscope, which is of box form—no light only from the back—rack and pinion focusing andlateral adjustment to the lenses, the whole mounted on a standat a convenient height. In the evening the stereoscope isplaced on a smooth papier mache tray, with a lamp and opalglobe, as illustrated (Fig. i.). After seeing that the illumina-tion, focusing and adjustment is all right for the first slide,the tray carrying the stereoscope and lamp may now be slidover the table cover backwards and forwards to several ob-servers, with the assurance that all t

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