. The book of photography; practical, theoretical and applied. frameactuated from outside the camera. Thereare various designs for the purpose, someof which are adjusted by the movementof a lever, others by a milled knob or awheel. They are generally provided witha graduated scale to enable the exactscreen distance to be read off, and with amicrometer screw for fine adjustment. 690 THE BOOK OF PHOTOGRAPHV Fig. 896 shows the Linley camera, inwhich the screen holder is held upon adovetailed slide moved to and fro by acentral lever. Above the latter will benoticed the micrometer screw, whichsuppl
. The book of photography; practical, theoretical and applied. frameactuated from outside the camera. Thereare various designs for the purpose, someof which are adjusted by the movementof a lever, others by a milled knob or awheel. They are generally provided witha graduated scale to enable the exactscreen distance to be read off, and with amicrometer screw for fine adjustment. 690 THE BOOK OF PHOTOGRAPHV Fig. 896 shows the Linley camera, inwhich the screen holder is held upon adovetailed slide moved to and fro by acentral lever. Above the latter will benoticed the micrometer screw, whichsupplies the fine adjustment. The cameraused for process work should be perfectlyrigid, and with all its parts truly is an advantage if movement is The B.\se and Copyboaru. A suitable camera having been ob-tained, it is essential to provide satisfac- •tory means of overcoming vibration, if >there is any likelihood of its occurring. !This may be accomplished by having aswing bed suspended from the roof, as \shown by Fig. 900, or by having a cradle. Fig. 89!).—JviuKoDLCTioN Camera with Tran-spakency Extension. arranged for from both back and front,with the control of both motions at theback within reach of the operator. Insome of the more expensi^e apparatusmechanical adjustments are even providedfor raising or lowering the front, shiftingthe lens, copyboard, etc., all from theback of the camera. Figs. 896 to 899illustrate typical designs of processcameras, and give a good idea of thesolidity of construction necessary. Thereproduction camera shown by Fig. 899 iswell adapted for large work. base on springs (Fig. 901). If, however, thestudio is in a quiet place, a rigid standresting on a floor of concrete will meetevery requirement; while even a woodenfloor may serve if pads of rubber or feltare placed under the legs of the easel should be perfectly level andtrue, and may either be fixed at the endof the base frame or slide to and from thecamera. It is a goo
Size: 1839px × 1359px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
