. The American annual of photography. Stanford University, California, in strong June sunshinebetween 10 and 3 For pictorial reasons I would farrather have made these exposures earlier or later in the day,but circumstances compelled-me to utilize what time I ordinary 4x5 plate camera was used with unbacked De-fender Ortho plates, not the double coated kind. No lens wasemployed except as a finder for the needlehole image which ofitself is too faint to be recognized on the ground glass. Myneedlehole is about diameter pierced in a bit ofsheet brass thick by
. The American annual of photography. Stanford University, California, in strong June sunshinebetween 10 and 3 For pictorial reasons I would farrather have made these exposures earlier or later in the day,but circumstances compelled-me to utilize what time I ordinary 4x5 plate camera was used with unbacked De-fender Ortho plates, not the double coated kind. No lens wasemployed except as a finder for the needlehole image which ofitself is too faint to be recognized on the ground glass. Myneedlehole is about diameter pierced in a bit ofsheet brass thick by a No. 11 Milward needle; themetal forming the edges of the hole being rubbed down to athinness of or less, and all trace of burr or irregu-larity removed so that the hole will pass inspection uuder theI in. objective of a microscope and appear perfectly piece of brass containing the hole is then fastened downto a piece of black card, which has a perforationabout yi in. diameter in the middle so that the needle- 217. Figure 2. hole centers; and the card is then cut out so as tocenter into a spare lens mount, and is secured there. Ofcourse the needlehole and the brass surrounding it are care-fully deadblacked. To return to the camera, my method is toremove from the shutter both combinations of the lensnormally there, replacing the empty shutter on the lens have two spare lens mounts which fit the front end of theshutter; the first contains an ordinary spectacle lens of 8 ; the second my needlehole mounted as above first place the spectacle lens in position in the front of theshutter just as if I were going to make the picture with it;open up the diaphragm wide, set the shutter at T. and openit, and proceed to compose the picture on the ground glass. If 218
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