Each camera as it leaves the factory is carefully calibrated for the infinity stop of the lens with which it is equipped. Permanence of this setting is effected by means of two small metal clamps fastened to the sliding track of the camera bed by means of small set screws. Whenever it is necessary to change the setting of the infinity stop the set screws should be loosened and the clamps reset in their new position. Resetting of the infinity stop should only be resorted to if the new setting is to be permanent. Before making the change it is good practice to make on the sliding track small marks with a fine sharp point of a needle to indicate the original position, which will facilitate resetting.
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