pside. The oldcamera is a wooden box {seepage 160, vol. I.), fit-ted in front with a brass tube, in which is a move-able achromatic lens; but in the improved camera,the lens, instead of moving in a brass tube, is fixedin the front of the apparatus, whereby an increaseof light is obtained, the… … We present a cut of this appar§.tus, which is con-structed with two grooves, a and b, that admit ofthe use of two lenses of different powers, adaptedto either portraiture or landscape. The operator isaided in determining the focus by the exclusion ofthe light, which is effected by the moveable…
Design · Decoration and ornament · Art
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