This equipment was designed to afford an adequate and convenient means of recording the technic of surgical operations, while requiring the minimum of training and effort on the part of the photographer. The apparatus and methods have been so simplified that an hour's instruction in focusing and adjusting the camera should enable one to make acceptable pictures of the operative procedures with which one is familiar. Such films are valuable as records, they are an aid to the surgeon in studying and modifying his technic, and they are useful in teaching.
The camera uses 16 mm. film in 100 or 200 foot (30.5 or 61 meter) rolls, permitting four or eight minutes of recording at the standard speed of sixteen frames per second. The mechanism is driven by an electric motor having a dynamically balanced armature, the gyroscopic action of which tends to counteract the vibration of other and
Pierce HF. A NEW MOTION PICTURE CAMERA FOR RECORDING OPERATIONS ON THE EYE. Arch Ophthalmol. 1933;10(6):818–821. doi:10.1001/archopht.1933.00830070100011
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