. The book of photography; practical, theoretical and applied. Fig. 822.— Tripod He.\d for Oxe-LensWork. of distance between the two points fromwhich the stereoscopic pictuies are apparatus, termed the StereoscopicTray, is shown in Fig. 823, and is in-tended to be used for stereoscopic workwhen a hand camera is employed. Thecamera, indicated by the dotted lines, isplaced at one end of the tray. An ex-posure is then made, and the cameraremoved to the opposite end for thesecond exposure. The distance betweenc, c, being somewhat less than the dis-tance between B, b, the axis
. The book of photography; practical, theoretical and applied. Fig. 822.— Tripod He.\d for Oxe-LensWork. of distance between the two points fromwhich the stereoscopic pictuies are apparatus, termed the StereoscopicTray, is shown in Fig. 823, and is in-tended to be used for stereoscopic workwhen a hand camera is employed. Thecamera, indicated by the dotted lines, isplaced at one end of the tray. An ex-posure is then made, and the cameraremoved to the opposite end for thesecond exposure. The distance betweenc, c, being somewhat less than the dis-tance between B, b, the axis of the camerain the two separate positions is such that. Fig. 823.—The Stereoscopic the lens is made to cover the same fieldof view in both positions. The Stereoscopic Adapter. Fig. 824 is an improvement on theapparatus already mentioned, inasmuch asthe work of accurately shifting the camerabetween the two exposures is done with the least possible loss of time. Thecamera is fixed at the block B, with thelens pointing over A. One exposurehaving been made, b, carrying the camerawith it, is moved in the direction of thearrow c till the two blocks are againtouching each other, when the secondplate is exposed. It will be seen that theparallel movement is regulated by a pairof metal links communicating with thetwo blocks. F is the screw and nut bywhich the apparatus is connected to thetripod head. An apparatus similar to theabove, but with the addition of adjust-able means for the separation of the twoview points, is shown by Fig. 825. Twoblocks, c, B, are connected together byfour parallel links. Two of these linksare seen at e, f. A sc
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
