Practical guide to photographic & photo-mechanical printing (1887)
Burton, W. K. (William Kinnimond) · London, Marion and co. · leaf 423
the Camera at its greatest exten- sion and placed upon the tri- pod ; a glance will show that the arrangement of struts is such as to secure the rigidity of the front that carries the lens, and the back that has to support the dark slide. The struts are held by movable set screws, and are so… … capable of use with a single lens (long focus), Fig. III. shows that the back of Camera can be advanced so as to allow the use of a wide-angle lens without any of the foreground being cut off, owing to the projection of the base board. DOUBLE SWING BACK. — Both swings are provided in a simple…
Photography · Photomechanical processes
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-1183-530.webp)
