File:The American annual of photography (1912) (14762575211).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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CHILD STUDY. _:j WILLIAM GILL. this respect, by adapting to it a lens of shorter focus thanthat for which the camera is intended. In the absence of alens board fitting the camera with the smaller lens, the planadopted by the writer is as follows: Take off the lens ringfrom the lens board of a 6^ by 8^ camera and secure tothis board the smaller board of a short focus lens, with a ringof cloth between them to exclude light. To effect this tackthree little strips of light brass or tin to the back of the largerboard, around the opening and extending slightly over its edge.
Text Appearing After Image:
Fig. II. EXTENSION TUBE ON CAMERA. J. A. ANDERSON. Through a hole in the end of each strip pass a light screw intothe smaller board, which is thus held in place. Another plan is the use of an extension tube, of suitablesize and convenient length, with means at one end of con-necting it with the camera, after the manner of the lens board,and, on the other end, brass clips to hold the lens board, ona surface of cloth or velvet. The tube may be of wood or metal, according to theingenuity or facilities of the operator. That used by the writeris a square tube of wood, as illustrated by the accompanyingdrawing and photograph (Figs. I and II). The inside isblackened and the joints are covered, within, by black paper 64 For those who are not accustomed to this kind of near-bywork, some points may be given respecting the method ofdetermining the distances each way from the lens and thetime of exposure, for any given size. The relative size is termed the ratio. Thus, if the copyis half the size

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