International photographer (Jan-Dec 1934)

Twenty-four The INTERNATIONAL PHOTOGRAPHER August, 1934 MINIATURE CAMERA PHOTOGRAPHY (Continued from Page 13) finder, for parallax. raphers who use Panatomic film in the 35 mm. motion Leica Single Exposure Camera: E. Leitz now offers picture size and wish to buy it in bulk, should know that a new precision miniature photographic apparatus in the this film is known to the motion picture industry as Eastform of a single exposure camera. It consists of a round man Background Negative. Its extreme fine grain qualimetal body into which a standard Leica lens is screwed. ties make it ideally suited for motion pictures of subjects An Ibsor shutter is provided. Focusing is accomplished which will be used in the transparency projection process, by means of a ground glass which slides in and out of the When ordering Panatomic film in bulk, you can therefore, camera interchangeably with metal film holders which refer to it as Eastman Background Negative. accommodate 35 mm. motion picture film in strips 1}4 Another Fine-Grain Developing Formula: It will be inches long. If desired a finder can be attached to the noticed in this formula that acetone is used as an alkali, camera. This new apparatus is really a miniature view „ . camera. Literature describing this camera can be obtained „ ,. .. ° u lon . „, by writing to E. Leitz, 60 E. 10th St., New York, N. Y. Oxalic acid. 0.4 Gms. 18 grs. New Contax Accessories: Carl Zeiss, Inc. announce Metol (Johnson)... 4 Gms. 175 grs. the addition of new accessories for the Contax Camera ?Y™&}^ add ... .... 12 Gms. 1 oz., 88 grs. including apparatus for taking instantaneous exposures of Potassium metab.sulphite... . 1 Gm. 44 grs. close objects (20, 13 and 8 inches), copy attachments, a Water 2UU cc. 20 oz. plate adapter, apparatus for photomicrography, projec c ... , . ° u l0n „ c . tion, etc. An interesting booklet describing these new ac Sodium sulphite (cryst.)... 48 Gms. 5^ oz. cessories can be obtained by writing to Carl Zeiss, 485 Water 168 cc. 20 oz. Fifth Ave., New York City, N. Y. Solution C The Nikor Tank: A new developing tank is being Acetone 40 cc. 4 oz. offered by Burleigh Brooks which is called the Nikor Water -U(J cc ^ ozTank. It is made entirely of stainless steel which does A working solution is made up by taking 15 parts of not contaminate the developing solution as other metal each solution and adding 80 parts of water, alloys are apt to. The tank can be cleaned with strong Reticulation: The usual cause of this detriment to our nitric acid without being injured. It can also, according negatives is the use of processing solutions which vary to the investigations of Dr. Franz Baur and Dr. Gottlieb widely in temperature. If the negative is transferred from Imhof on stainless steel, be used for physical development. a warm hypo solution to cold wash water, etc., a strain This tank is offered at a reasonable price and should prove will be set up in the gelatin causing reticulation. Some popular with miniature photographers. workers have also discovered that the use of a strong hypo A Method of Printing Grainy Negatives : In a grainy solution is prone to cause reticulation. The strong solunegative there exist relatively large clumps of silver grains tion acts too quickly and violently upon the emulsion and similarly large interstices between these clumps. If thereby straining the gelatine. Photographers who have the grains were enlarged so that the interstices were re been experiencing reticulation despite careful guarding ducd in size, graininess would be reduced. At the same against differences in temperature of the processing solutime, however, detail would suffer and there would also tions should try the use of a weaker hypo solution to overbe a loss in definition. come this evil. By treating the negative according to the method Alcohol for Drying : Many miniature camera workers described below, the grains of silver will be converted into use alcohol to hasten the drying of their films, for fast a silver compound that will occupy a larger space. The drying favors fine grain. They may be advised that al expanded grains will fill up some of the interstices previ cohol also has a very slight reducing effect on the nega ously present thereby giving a more even deposit. tive. No doubt, in the average well exposed negative this A 10%. solution of potassium iodide is made up and in reducing effect of alcohol will not cause deleterious effects it is dissolved enough iodine to make a 0.5 % solution. in regards to subsequent printing. The negative is treated with this solution until it bleaches Care of Cases: Practically all miniature camera owncompletely, the silver image being converted into silver ers take good care of their cameras, but many are prone iodide, after which the negative is dyed with Rhodamine to neglect their cases. The ideal treatment for leather B to give the opacity necessary for printing. The negative camera and lens cases is the application of neetsfoot oil is then rinsed to free it from excess dye and when dried it about twice a year. This substance is obtained from the is ready for printing. feet of cattle and keeps leather in a soft and pliable conMany experienced workers use a diffusion filter over dition. It can be obtained at any drug store, the enlarging lens when making big enlargements to help The oil is applied to the leather with a piece of absorbeliminate graininess. A very light diffuser such as the ent cotton or a soft cloth and the case is laid aside to allow Scheibe 1/64 Diffusion Filter will work well for this the oil to soak into the leather. During cold weather a purpose. precipitate will form in the oil. This is easily re-dissolved Panatomic Film in Bulk: Miniature camera photog by the application of heat. L A. AMATEUR CINE CLUB A unique and unusual meeting of 16 mm. amateurs is planned for August 7th when members of the Los Angeles Amateur Cine Club meet in the Auditorium of the Hollywood Citizen-News. This will be "Title" night, when every member who has found short-cuts or unique methods of making titles, either with apparatus built by himself or through experimentation, will demonstrate his findings. According to Wm. J. Seeman, chairman of the program committeee, it is planned to take movies of actual titles of varied kinds and to do the development and coloring at the meeting. This is a part of the Club's monthly program to use every other meeting for demonstration or talks by professional cameramen, with alternate meetings devoted to contests among members. Included among the interesting films done by the members is a composite 1600 foot film of the Olympic Games. Taken by some 30 cameras, the best of 8,000 feet is used to include the major events of those fourteen days. At present a progressive picture is being made of the Hoover Dam. Started in 1928 it shows the construction and development of the world's greatest engineering feat.