. Photographic pastimes : a series of interesting experiments for amateurs for obtaining novel and curious effects with the aid of the camera. of light. Care must be usedto have the distance from the lens to C,when closed, equal to the focal length. (43) HOW TO MAKE STEREOSCOPIC PHOTOGRAPHSWITH THE ORDINARY CAMERA. For some of the experiments describedpreviously stereoscopic pictures are re-quired ; it will, therefore, be useful tomany readers to learn a method by whichit is possible to produce such pictureswithout the aid of specially constructedstereoscopic cameras. Mr. Valentine Blanchard d
. Photographic pastimes : a series of interesting experiments for amateurs for obtaining novel and curious effects with the aid of the camera. of light. Care must be usedto have the distance from the lens to C,when closed, equal to the focal length. (43) HOW TO MAKE STEREOSCOPIC PHOTOGRAPHSWITH THE ORDINARY CAMERA. For some of the experiments describedpreviously stereoscopic pictures are re-quired ; it will, therefore, be useful tomany readers to learn a method by whichit is possible to produce such pictureswithout the aid of specially constructedstereoscopic cameras. Mr. Valentine Blanchard described thefollowing simple piece of additionalapparatus necessary for the purpose,which can be made by any size will be determined by the base-board of the camera. All that has to beremembered in its construction is the fact 174 PHOTOGRAPHIC PASTIMES. that a movement from left to right, orfrom right to left, of about three inchesis necessary. A very light quarter-platecamera may be employed, the baseboardof which measures, say, 7J by 5J becomes necessary in this case to getready a smoothly-planed piece of wood,. Fig. 67.—Additional Apparatus for Making Photo-graphs FOR the Stereoscope. by 8 inches. On the front, and partlyon two sides, pieces of wood half-an-inchwide are neatly fixed. This furnishes, aswill be seen by the diagram, a true edgefor the front of the camera, and a boundaryon each side for its lateral movement,which will be seen to be exactly threeinches, for the inside measurement will STEREOSCOPIC PHOTOGRAPHS. 175 be found to be 7J by 8J inches. In theabove diagram the wood is not continuedentirely along the sides, but whereverpossible it is best to continue it. quitealong, for it furnishes a protection againstwarping. A hole is placed in the centrefor a flat headed screw to attach it to thetripod head, which is shown by dottedlines, and two other holes are marked toattach the camera by means of theordinary screw from below in the usualm
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