STUDIO CAMERAS AND APPARATUS. Studio cameras, stands, etc., are fully 16 ft. across, with an 8-ft. how window. By working across in the manner shown excellent effects may be obtained. If the face re quires less contrast, lower blind marked 3 half-way, No. 2 less, and No. 1 slightly. The principle upon NV111C11 to AV011i 1S as o 11 Suppose the camera to be the centre of an imaginary arc drawn from the window inwards, on which line the model is placed ; as the sitter leaves the window- the light becomes gradually softer, until when nearly opposite the centre of the window the lighting will be flat. Many different kinds of framework to fit a window for regulating the light have been suggested, but none can be re commended, because as mach light as possible is required, and even then it is necessary to use the most rapid plates and a portrait lens working at a large dealt with in the section on Cameras and Accessories (see pp. 36 to 3S and 51 to 53). excellent pattern may, however, he illustrated by Fig. 624. Here will he noted very complete arrangements for raising, lowering, and tilting the camera with the minimum of trouble and exertion, while below are shown the val ions hacks provided to enable plates of different sizes to be used. Fig. 625 shows a stand
specially adapted for large and heavy ap paratus. What is known as a " repeating back " is a great convenience, enabling several small-size pictures to be obtained on one plate. Most studio cameras are now provided with this to the extent of allowing half and quarter-plate photo graphs to be taken on a whole plate. An ingenious fitting, ap plicable to any camera, has lately been introduced, by means of which a number of midget or postage-stamp pictures may be taken on quarter plates (see Fig. 626). The illustration shows the back inserted in the sliding frame with the focussing screen in position for the first picture, For posure, the screen is drawn to the left till it meets the stop rr, the shutter of the dark-slide n being held by the bolt D, and thus withdrawn by the act of pulling the slide forward. The exposure is made on the top left hand corner of the plate, the number being automatically registered on the indicator J. Returning the focussing screen to position actuates a simple