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plied with a "Super" lens with bloomed finish, F:i.6 two-inch as standard equipment, and easily replaceable with other lenses of various sizes in focal length.
Illumination is provided by standard lamps of 750 or 1,000 watts, and although these lamps are prefocussed, provision is made in the Premier-20 for extra micro thumb-screw adjustment— an added refinement much appreciated by professional users. The spool arms are permanently attached and made to accommodate spools of 2,000' capacity. There is also a stillpicture device, and an automatic fire-shutter which comes into operation should the motor slow down or stop, and which obviate0 the possibility of the film blistering.
Cooling is provided by a powerful centrifugal fan which not only cools the lamp and inner optical system, but the amplifier and motor as well.
The triple claw movement is extremely smooth in action, and as three sprocket-holes are engaged simultaneously there is little chance of losing a loop, and good shows are therefore possible even though the film may be extensively damaged.
Threading is actually easier than it looks, and an important time-saving factor is the fact that both sprocket-shoes open and close automatically as the film gate is operated, and a handy pilot-lamp facilitates threading in the dark.
Rewinding is fast and automatic, and speedily accomplished without having to transfer spools or belts. There are also handy controls for framing and for tilting the projector-head.
The removable front and rear covers facilitate servicing, and both the reflector and condenser lenses are mounted on the front cover for speedy cleaning.
All parts which actually touch the film are specially designed to prevent scratches to the picture or sound-track, and a feature of the film path through the sound-head is the provision for side tension on the sound-track side, and an even pressure-feed tension on the sprocket side. The film is practically "nursed" through the projector from feed to take-up, and it is obvious that the whole machine has been carefully designed for both projection and the care of film.
The sound drum and filter are mounted on precision roller bearings, and there is no sliding action between the drum and the film, thus prolonging film life and maintaining high quality
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