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If the camera is not designed for this speed, you may encounter a variety of troubles. The most likely are slow starting and poor speed stability. These will show up as density variations in the final picture. So after adjustment, check your camera by exposing some cheap film stock on a subject containing a full range of greys. You will then see how quickly the camera attains full speed and for how long it maintains it.
Film Stock
Magnetic stripe is applied to the side of the film facing the projector lamp. This means that if you use reversal film in the camera, the stripe will eventually be applied to the base (shiny) side of the film. The magnetic coating adheres very well to film base and, provided the film is clean in the first place, will not tend to flake off.
If you shoot your film on negative stock, however, a normal contact print has the emulsion side facing the projector lamp. If the magnetic coating is applied to the emulsion, the adhesion is not as good as to the base. After a while it may flake off in parts. You can avoid this danger by having your films optically printed so that they are projected with the emulsion towards the lens.
The first standards adopted for 16-mm. magnetic sound films prescribed the simple substitution of a magnetic stripe for the familiar optical sound track. This requires singleperforated film for projection as the sound track lies where the second row of perforations come on a silent film. If you use reversal film, you must therefore shoot on singleperforated stock. The single-perforated film is available from several manufacturers and costs no more than the double-perforated type. With a few cameras its use presents no problem. With others, you may have to get the teeth removed from one side of the camera sprockets. If the camera claw is on the left of the film, looking at it from the back, even this will not do, however. Magazine-loading
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