File:The complete aquarium book; the care and breeding of goldfish and tropical fishes (1936) (20483589930).jpg

Title: The complete aquarium book; the care and breeding of goldfish and tropical fishes
Identifier: completeaquarium00inne (find matches)
Year: 1936 (1930s)
Authors: Innes, William T. (William Thornton), 1874-1969
Subjects: Aquariums; Goldfish
Publisher: New York, Halcyon house
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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CHAPTER NINE
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It is obvious how important, as well as interesting, photographic records of fishes can be. In writing on the subject in the hope of having others enter this field of work, the author presupposes a fair photographic technique to start with. The main requirements are a small aquarium with a front of thin plate glass and an adjustment for keeping the subject in focus, a few card backgrounds of different shades, a sliding board on which to focus the camera by moving the whole instrument (preferably, but not necessarily, of back-focus design), and a lens working at about F5 to F6. The author does his own work on a board, the ends of which are laid on the seats of two chairs, fastening a piece of cardboard to the back of one of the chairs to act as a background. The aquarium, with a front seven inches square and a thickness of two and one-half inches, is usually stood about a foot from the background, to keep it out of focus and to avoid shadows from the edges of the aquarium. The fishes are kept in the focal plane by use of an adjustable glass partition. For holding small fishes in place the following simple arrangement is used: three pieces of glass are cut about twice the width of the thickness of the fish, and of a length from three to five inches, according to require- ments of length of fish. The ends are fastened together with adhesive tape like three sides of a square. The free ends are given a cut to end them off at about forty-five degrees or less. These free ends are fastened to top edge of partition by clips, first filing a nick in the beveled surface for the clip to catch in. The glass partition with this three-sided cage attached (open at top) is then pushed up against the front glass and the apparatus is ready to receive the fish. This not only confines the fish strictly in the focal space, but keeps it out of the corners of the aquarium, where it would delight in exhausting the patience of the photographer. It is a good plan to have a number of these little cages made up to different sizes to suit the measurement of the fish to be photographed. Photographing to about two-thirds size is usually satisfactory. Larger than this cuts down speed and focal depth too much. Water

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