. The book of photography; practical, theoretical and applied. Fig. 116.—FociL Plane Shutter (Side View). Fig. 114.—Focal Plane Shdtter passage of an opening in a spring blindwhich may be set to pass at any givenspeed. This is controlled by the numberof turns given to the spring of the roller,and the mechanism is released by pressingan indiarubber bulb at the end of a lengthof tubing. These shutters may be ob-tained to work either in front of or behind. Fig. 115.—Sees.\w Shctter. the lens, while a third description, knownas the Focal Plane, works just in frontof the plate. The advantage of the
. The book of photography; practical, theoretical and applied. Fig. 116.—FociL Plane Shutter (Side View). Fig. 114.—Focal Plane Shdtter passage of an opening in a spring blindwhich may be set to pass at any givenspeed. This is controlled by the numberof turns given to the spring of the roller,and the mechanism is released by pressingan indiarubber bulb at the end of a lengthof tubing. These shutters may be ob-tained to work either in front of or behind. Fig. 115.—Sees.\w Shctter. the lens, while a third description, knownas the Focal Plane, works just in frontof the plate. The advantage of the latteris that more light is allowed to reach theplate, and the exposure may consequentlybe shorter. These may now be obtainedwith an adjustable slit which gives agreater range of speed (see Figs. 114 and IIG).
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
