File:The American annual of photography (1917) (14597430238).jpg

Identifier: americanannualof1917newy (find matches)
Title: The American annual of photography
Year: 1917 (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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Text Appearing Before Image:
Figure 3. mediately in front of the one already in position, which reducesthe focal length to about 4 inches. In the latter I use in placeof the spectacle lens one combination of my R.R. lens whichhas a focus of about 11 inches. Having composed the viewI remove the lens used as finder and screw in its place themount containing the needlehole, close the shutter, insert theplate holder, and make the exposure in the usual manner. 220
Text Appearing After Image:
CO in w X ww <Hen W P^I—I ww o < H WXH 221 Figure i is the Lathrop monument, Stanfords famousAngel of Sorrow. This is shown as an example of the defi-nition yielded by a well made needlehole. It may not be criti-cally sharp, but I submit that it is sharp enough to absolvelensless pictures from the charge of fuzziness. In this casethe distance between needlehole and plate, hereafter abbre-viated as p.d., was 8 in. and the exposure 30 sec. Figure 2 shows the tomb of the founders of the University,Senator and Mrs. Leland Stanford. Figure 2 was made withthe camera only twenty feet from the corner of the buildingwith a p.d. of 3^ in. and an exposure of 10 sec. The blackcut off at the top clearly shows that the method of using thecamera with the shutter in position as described above is amistake; for it was the back portion of the shutter which cutoff the light in this extremely wide angle view. Both thefinder lens and the needlehole should be so arranged as toscrew directly into th

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