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The stereoscope and stereoscopic photography (1890)
Drouin, F. (Felix) · Bradford ; London : Percy Lund, The Country Press · leaf 30
of distinct vision. Froma longer distance the relief is, practically speaking,no longer perceived; and if we attempt to estimate 0/ „J > o 3 h Fig. 9. AND STEREOSCOPIC PHOTOGRAPHY. 23 the distances between any objects it is by firstdeciding on their probable dimensions. These facts are made use… … ©,■ i <t> Fis. 10. the spectator can scarcely tell where the realityterminates and the painting begins. The telestereoscope, invented by Helmholz, 1857,is an apparatus the function of which is to increasethe relief of distant objects by enlarging the opticalangle in the following manner : —…Stereoscope · Photography, Stereoscopic
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