This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
594. The Folding Pocket Kodak is arranged before a window in exactly the same manner as a larger camera, but as it is not provided with a flat-bed to rest on any flat surface, a frame must be constructed to hold it in place against the window. A very convenient frame, to which the kodak is fastened by stout rubber-bands, is shown in Illustration No. 9. This frame is attached to a board, fastened across the window and containing an opening not larger than the back of the kodak.
595. Other pocket film cameras, which are made with drop fronts providing a flat-bed, can be used of course, in the same manner as the regular hand or view cameras.
596. The frame, as seen in Illustration No. 9, is easily constructed, consisting of a box made of one-half inch pine lumber, about 3 inches deep, by the width of the camera and the length of the film employed, with a projection on the front extending 1 1/2 inches at the top and 2 inches on the bottom. Attached to the bottom is a wooden strip 3 inches wide used as a shelf upon which the end of the camera rests, which is held in position and in close contact with the frame by means of heavy rubber-bands slipped over the extension and camera-both at the top and at the bottom. The rear of the box, which is intended to face the window, contains grooves to receive the negative. The inside of the box is stained dead black. This extra box attachment also serves to give more focal length to the camera and thus enables you to make larger pictures with it than without it.
Illustration No. 9. Enlarging Frame to Hold Kodak. See Paragraph No. 594.
Illustration No. 10. Kodak Attached to Frame. See Paragraph No. 597.
597. Illustration No. 10 shows a camera and holding-frame in profile and illustrates the method of holding the camera in position with rubber-bands.
598. To place the negative in position for enlarging, procure two pieces of plain glass to fit the opening, A, in the holding-frame. See that the glasses employed are without flaws and perfectly clean. Place the negative to be enlarged from between the glasses, binding the ends of the glasses with a small piece of adhesive tape to insure the film negative lying flat. Then insert the glasses and film in groove A, with the negative upside down and with the dull (film) side facing into the room. Next remove the back from the camera (as it will not be used while enlarging) and place the camera in the holding-frame, as shown in Illustration No. 11, securing it to the frame with heavy rubber-bands. By using rubber-bands the camera is held in position without danger of marring or scratching the leather covering.
Illustration No. 11. Kodak in Position. See Paragraph No. 598.
599. In many instances, the actual picture is contained in a comparatively small portion of the negative and in such cases all undesirable portions may be covered with a mask of black paper. In order to be certain that no light enters between the camera and the holding-frame an opaque cloth should be wrapped around the camera and frame.
Lens. Any lens that will make a good negative may be used for enlarging. The proper size (focal length) of the lens depends entirely upon the size of the negative to be enlarged from and not at all upon the size of the enlargement to be made.
602. The lens that made the negative will be suitable for making the enlargement. If the lens will cover the negative it will make an enlargement from it of any size. The regular lens fitted to any hand camera is suitable for enlarging from negatives made with it.