The international photographer (Jan-Dec 1935)

October, 1935 The INTERNATIONAL PHOTOGRAPH F. K Nine again, being individual, their order or sequence can be changed at will, this being often necessary to lecturers and the like who may have occasion to change their talks from one performance to the next. There are really two methods of preparing glass slides. The first is the well-known routine by means of which a sensitized glass plate is printed and developed in the usual way. The second consists of cutting each picture in a film slide strip apart and mounting it between two cover-glasses, binding them together in the usual manner. Both methods are highly satisfactory, and the choice rests with the individual worker. Glass slides offer ample protection to the emulsion in both cases, and can be cleaned and polished after each showing without the for it has mighty interesting advantages, and is a welcome relief from tedium for those who think they have exhausted all the possibilities of their small camera. Visit a local dealer and get the details about the equipment mentioned here — I'll wager that it won't be long before you step out and order suitable accessories for your particular needs and shortly after that you will be spending your evenings, or at any rate most of them, by the home fireside with your family, having oodles of fun with this new form of entertainment. From Kodak Abstract Bulletin: CINEMATOGRAPHY IN RELIEF AND THE NEW PROCESS OF LOUIS LUMIERE, P. Hemardinquer. Rev. Franc. Photog. 16:65-8. 'Winter Shadows' "Late Afternoon on Lake Winnepesaukee" "Snow-laden Boughs across the Brook' slightest fear of damage. Natural color pictures, such as the Dufoycolor, Lumiere Filmcolor, and DuPont DuPac processes arc always best mounted between glass for protection and permanency. After the positive pictures have been made in either film or glass, the next step is naturally to project them. Only a short time ago it was something of a problem as to what to use, existing projectors being either too bulky or too expensive for these miniature sized slides. Today there is quite an arrav of moderate priced projectors on the market, the most popular of -which is undoubtedly the Leitz Umino projector, a small, compact machine which is made primarily of bakelite and weighs next to nothing. In spite of its small size, it accommodates not only film slides of 3/4xl and lxl V2 inch areas, but also the miniature standard 2x2 inch glass slides. The projector may be equipped with either a 50 or 100 watt lamp; amp'e illumination for even natural color pictures provided the screen area is not too large. The Umino projector is ideal for home and office use. Where pictures are to be shown in large halls and auditoriums, a more powerful projector, such as the Udimo-300 or Udimo-500, is required. These machines are naturally more costly, and they also accommodate all forms of miniature camera slides, as in the case of the Umino. Natural color specialists generally find it more advantageous to have one of the more powerful Udimo projectors so that even their dense color pictures can be "cut through" and projected upon the screen without less of light. As to the applications, think of the value of screen material for salesmen, educators, lecturers, and organizations, to say nothing of amateurs who just like to show their pictures in enlarged size on a screen for the entertainment of friends and themselves at will. One acquaintance of mine regularly copies the "funnies" in the newspapers with his Leica and sliding focusing copy attachment, for his children. These he shows them as a reward for being good or some such reason. Strange to say — or is it so strange — the kiddies never tire of seeing the old ones over and over again, along with the latest. This amateur has now quite a library of slides of the funny sheets, as may well be imagined. He likewise makes slides of most of his snapshot pictures, especially of the kiddies. Maybe they don't like to see themselves almost life-size on the screen! There are so many ideas connected with this "by-product" of miniature camera photography that a book could easily be written on the subject, and then leave a good deal to say. It is hoped that these few words on the subject will at least stimulate many amateurs into activity in this rather new field, No. 365, March 1, 1935; Photographe 22:61-4. No. 381, March 5, 1935; Photo Revue 47:154-6, May 15, 1935. Numerous inventors have worked on the problem of projecting images in relief. Much of their failure has been due to lack of study of elementary psycho-physiological principles. The sensation of relief is the result of binocular vision. The principle of stereoscopic projection and especially by anaglyphs is very old. The simple form in which eyeglasses with red and green complementary colors were used presents grave difficulties of ocular fatigue and imperfect images. Lumiere has made improvements in suppressing optical fatigue and in obtaining perfected images by correlating his improved projected images with his new viewing glasses. — C. E. M. Phone GLadstone 4151 HOLLYWOOD STATE BANK The only Bank in the Industrial District of Hollywood under State Supervision Santa Monica Boulevard at Highland Avenue CAMERA & PROP RENTALS Camera Supply Co. 1515 Cahuenga Blvd. Hollywood, Calif. Ruddy Ceraus, Manager GLadstone 2404 Nite Phone CLadstone 6583 Cable Address — "CAMERAS" Please mention The International Photographer when corresponding with advertisers.