The international photographer (Jan-Dec 1934)

Twenty-four T h INTERNATIONAL PHOTOGRAPHER December, 1934 MINIATURE CAMERA PHOTOGRAPHY (Continued from Page 12) ment to every negative, for business reasons will not allow the expenditure of the time required. Then again individual treatment is dependent upon the effect desired, and the finisher is not expected to interpret the desires of the photographer. The commercial finisher prints the entire negative where in some cases the composition in a portion of it would produce an outstanding print. This is another reason why he can't produce the best results, for he must not take the initiative and print his selected portions of a negative, a practice which may not be in accord with the desires of his customer. The above is not intended to condemn the commercial finisher ; he fills a definite need. Many miniature photographers do not have the time to print all their negatives. Yes, the fact that the small camera allows from about 12 to 36 exposures per loading is one reason why miniature photographers take many pictures. If we take into consideration a camera such as the new Leica FF, which allows up to 250 exposures per loading ; can you wonder why the man with the miniature "shoots" them from all angles? Suppose a good enlarger is obtained by the busy individual who has a limited time to devote to printing. He can then leave the many negatives of little Bobbie going through his daily antics to the commercial finisher, and save pictorial negatives which promise interesting prints until he has some free time to print them. One of the greatest joys in miniature camera photography is doing your own enlarging. New Speed Rating: Photographers using foreign films may have noticed a new speed rating on the packages of film. This is the new DIN system which has been instituted after the German government had arranged with the film manufacturers for an entirely new method of film speed rating. DIN stands for "Das ist Norm" which means "This is standard." The degrees denoting speed in this system are expressed as a fraction with the constant denominator "10", so as to make the new system obvious. As with Scheiner degrees each three additional DIN degrees indicate twice the speed. The new DIN system cannot accurately be compared with Scheiner degrees. The following table however will serve as a suittable guide: SCHEINER DIN 10 3/10 11 4/10 12 5/10 13 6/10 14 7/10 15 8/10 16 9/10 17 10/10 18 11/10 19 12/10 20 13/10 21 14/10 22 15/10 23 16/10 24 17/10 25 18/10 26 19/10 A pamphlet describing this new system more fully can be obtained by writing to Photo Utilities, Inc., 152 West 42nd St., New York City, N. Y. Miniature Camera Salon Lugene, Inc. has announced the Third Annual Miniature Camera Salon. Here is an opportunity for the miniature camera photographer to display his wares and also have the chance to win some substantial prizes. For specific information write to Lugene, Inc., 600 Madison Ave., New York City, N. Y. 35mm. Contact Printing: Many photographers using cameras accommodating motion picture film like to make contact prints from the small negatives. To facilitate matters contact paper can be obtained in rolls which is 35mm. wide and is supplied unperforated. Such paper rolls are made by Afga Ansco of their Convira paper. It is supplied in single weight glossy surface only, and in soft and medium contrasts. Solution for Preservation: Last month some hints were given on the preservation of film, and it was recommended that humidifying pads moistened with water be used in negative containers. This problem is of import to workers who use motion picture film and keep their negatives in the entire roll (about five feet long) instead of cutting it up into strips. With some films, if the roll is left lying about, at the end of a few months it will be found to have shrunk to a considerably more compact roll, and will be harder to handle. With the larger films, as the 117 and 120 size rollfilms this problem will not be found to prop up. Water used on the humidfying pads evaporates rapidly, but the following solution usually employed in motion picture work, will be found to be considerably more lasting and is excellent for the purpose. Camphor 1 dram Menthol 1 dram Oil Eucalyptus 2 drams Glycerine, to make 4 ounces This solution can be made up by any druggist. If you wish to prepare it yourself use the following procedure: Place the camphor and menthol with a very small quantity of glycerine in a stoppered bottle and liquefy them with the aid of heat. As an alternative the camphor and menthol can be placed in a mortar and trituated together, which will result in their becoming liquefied. Then add the oil of eucalyptus, and sufficient glycerine to make 4 ounces. For use: dilute half with water and moisten the humidifying pads. Photoflood Table: Winter is upon us and now is the time when longer nights afford us plenty of time to practice indoor photography. To facilitate matters I am including below a table on the Photoflood lamp which is calculated for diaphragm openings from f:1.9 to f:12.5. EXPOSURES FOR THE PHOTOFLOOD LAMP Agfa Fine-Grain Plenachrome and Eastman Verichrome Films Distance — lamps Diaphragm No. of lamps Time in to subject opening in reflectors seconds 4 feet f:1.9 1 1/30 f:2.5 1 1/20 f:3.2 1 1/10 f:3.5 1 1/8 f:4.5 1 1/5 f:6.3 1 1/2 f:9.0 1 1 f:12.5 1 2 6 feet f:1.9 1 1/5 f:2.5 1 1/3 f.3.2 1 1/2 f:3.5 1 3/4 f:4.5 1 1 f:6.3 1 \y2 f:9.0 1 2 f:12.5 2 2 10 feet f:1.9 1 1/2 (Turn to Page 26) Phone CLadstone 4151 HOLLYWOOD STATE BANK The only Bank in the Industrial District of Hollywood under State Supervision Santa Monica Boulevard at Highland Avenue Please mention The International Photographer when corresponding with advertisers.