. The book of photography; practical, theoretical and applied. s. 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
. The book of photography; practical, theoretical and applied. s. 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 scale is provided atJ, which has a projection at right angles,upon which rests the adjustable screw Fig. 824.—The Steueoscopic It is obvious that, by turning the screwin or out, as the case may require, theplay of the carrying block B will be di-minished or increased. The camera em-ployed is attached to the block B, oneexposure being made with it in the twopositions d and a. Stereoscopic Effects by moving theSubject. When the subject is small, such, forinstance, as a vase of flowers, very goodresults may be obtained by displacing thesubject between the exposures of the twoplates ; but in this case an absolutelyplain background must be provided, andthe subject must not be too highlylighted, otherwise the dark shadows cast,which are not stereoscopic, will produce,unsatisfactory results in the combinedview. In microscopic work, the subjectshould be mounted on a tilting slab. STEREOSCOPIC rHOTOGRAPH^. 619 Browns Stereoscopic Adapter. Before leaving the subject of successiveexposures, reference should be made toth
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
