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Following are some of the many defects that can happen in the pro-. jection of motion picture film and if any of them are ever observed on the screen in your theatre, they are to be immediately called
to the attention of the pap cau ten leys on duty, or if necessary, to the Projection Department.
For example, consider Illustration No. 1. On our first gaze the scene appears clear, well-defined, and evenly-illuminated. But now the same picture shows_a distinct fuzzy appearance in the center, together with uneven illumination.
This lack of clarity in the center of the picture and the uneven illumination over the entire picture should be described clearly and carefully by the manager, or his assistants, to the projectionists, who oe feae description of the effect can determine the cause of the defect.
In this particular demonstration, the fuzzy appearance of certain of the characters in the foreground and other in the background, can be caused by one of several defects in the function of the equipment or film. The lens in the projector may not be in microscopic focus, a condition easily rectified by the projectionist. This would no doubt be the cause if the fuzziness continued over a period of time.
If this fuzziness continues Saat Stae & Supecr ane to go out
of focus and soon return to normal throughout the run of the film, it is possible that the print is buckled. Careful examination of the film by the pro jecuions a: will quickly determine whether this condition exists. And, if it does, a new print should be required from the Exchange.
On the other hand, if it is found that the film is normal, then the cause of this defect is no doubt due to lack of proper tension on the film in its travel through the film trap. This cause can be quickly eliminated by tightening the tension on the film shoes.
In case of Feueee anes or light intensity varying with great rapidity, the projectionist should ascertain whether the carbon are is of proper length, or whether the exhaust blower is ne too strongly on the arc. In the former, it may be that the arc feed motor is not propery feeding the carbons, and requires attention. In the latter case, the exhaust blower pulling too strongly in the pee an adjustment of the smoke stack damper in the lamphouse will reduce the blower suction.
PICTURE OUT OF FRAME
Illustration No. 2 reveals a mis-frame.
We have demonstrated the various conditions of mis-frame --
the effect is not always caused by the carelessness of the
PS ome articularly on the first show of the opening day of the film, bu may be the result of a misplaced splice made by another theatre which had escaped detection by film exchange examiners. After the first run of the film, mis-frames can occur by the pre Jeet pnist not threading proper Ly or in the process of handling the film, tearing a sprogket-hole. Calling the projec