Document 6B3y3Z9njgJbJ2EQjQ2mknwz6

the manufacturers of film and projectors, camera stores, libraries, schools, and publi cations The National Safety News, for in stance, frequently carries detailed articles on producing slide shows, using slides, and re lated topics The National Safety Council also publishes a senes of Data Sheets on the subject (see References) Slides The most versatile visual aid probably is the 2 by 2 m shde, made from 35 mm (or 126 or 127) film in color or m black and white Among the advantages of this aid are the low cost of the ongmal film and the ease with which the pictures can be made and shown and that sound can be added Programmers and other accessones permit special effects, sound, and automatic features which lend greater versatility The larger 35* by 4 in slides, which require a powerful auditonum-type projector, are used more often than the 2 m slides by in structors and sjieakers appeanng before large audiences "Instant" slides 211 m square or 351 in by 4 m can be made directly from Polaroid Land camera transparencies The slides can be mounted qmckly in plastic frames for use m either an overhead projector fitted with a shde attachment or in a special lantern shde projector Shde projectors range from inexpensive single slide projectors that can be held m the hand and pointed at the screen, to remote control or automatic change projectors that have trays or magazines holding up to 140 slides A small rear projection portable ma chine in a self-contained case, designed for table top use, is suitable for very small groups With a taped or recorded message, this type is well suited to training one or more em ployees Filmstrips The term "filmstnp" is preferred to the term "shde film" because the latter may be mistakenly understood to mean the separate shdes A filmstrip is merely a strip of stand ard 35mm film on which has been photo graphed a series of single frame pictures whose area is about one-half that of a stand ard 35 mm double frame 2 in shde Because the pictures in a filmstrip never can get reversed, lost, or out of sequence and because a strip can be rolled and placed in a small can, filmstrips are widely used by de centralized or multi-unit organizations in which a single copy must be shipped back and forth Also, although the first cost is higher than that of the 2-rn square shdes, it is not expensive to have a large number of copies made Fig 14--13 shows dimensions h----------------------*1 FILMSTRIP AND SLIDE MASKS - HARD BOARD (TEMPERED MASONITE) (------------------------- H Fig 14-13 --Filmstnp and slide masks can be used m conjunction with a copy stand to make filmstnps (above diagram) at two exposures per exposure on standard 35mm film, or 2 by 2-m slides (lower diagram) Masks can be made of K-in hard board with beveled edges Inexpen sive, commercially available copying stands make it easy for anyone to transfer pnnted material or artwork to 35mm film Courtesy Eastman Kodak Co of masks that can be used for making both filmstnps and 2 by 2 shdes by copying with a 35mm camera Filmstnps require even more careful plan ning than shdes because it is impossible to rearrange the frames or to add new material to suit specific situations or changing times Also, unless a single-frame camera is used. 339