. The book of photography; practical, theoretical and applied. venience of being ableto carry about any number of films readyfor exposure as desired is certainly onewhich must appeal to the touiist photo-grapher. It should be mentioned, how-ever, that an adapter, or a slight altera-tion of the camera-back, is required beforethese contrivances can be used with ap-paratus not specially made for them or towhich they have not been fitted. The Rajar changer can generally be ad-justed to any camera without alterationbeing necessary. There are other ar-rangements for carrying a number of flat CAMERAS
. The book of photography; practical, theoretical and applied. venience of being ableto carry about any number of films readyfor exposure as desired is certainly onewhich must appeal to the touiist photo-grapher. It should be mentioned, how-ever, that an adapter, or a slight altera-tion of the camera-back, is required beforethese contrivances can be used with ap-paratus not specially made for them or towhich they have not been fitted. The Rajar changer can generally be ad-justed to any camera without alterationbeing necessary. There are other ar-rangements for carrying a number of flat CAMERAS AND ACCESSORIES. 59^ ilms, but these generally require a specialcamera or holder, although, as a rule, very:convenient and satisfactory. view-finder may be described as atiny camera attached to the outside of alarger one, in such a manner as to enablethe operator to see the view being takenwithout the necessity of looking at theground glass. They are fitted to handcameras principally, and may be of thebox form or what is known as Bi-CoNCAVE View Finder. The former are provided with a small lens,the view from which is reflected by amirror on to a square of ground glass ; thelatter consist of an arrangement of prisms,or prisms and lens, and give an extremelyvisible and brilliant image. A thirdfinder, is made on the principle of a rifle-sight, and requires to be looked throughon a level with the eye. An adaptationof this description of finder is the bi-con-cave (Fig. 126), which consists of a smalldiminishing glass fitted in a rectangularupright frame. In cameras of the reflexvariety the view is thrown upward on afull-size focussing scieen by means of aninclined mirror, which can be turned asideout of the way during exposure (see Fig127). In the twin-lens cameras, which aieprovided with a pair of similar lenses, one above the other, the upper lens is used foifocussing and inspection of the view rightup to the moment of exposuie. Levelsand plumb indica
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
