Bolex 18-5 Auto (1963–1966)
An 8mm film projector with automatic threading and dual-speed projection, made by Bolex
Overview
The Bolex 18-5 Auto is an 8mm film projector manufactured by Bolex from 1963 to 1966. It features automatic threading that feeds film through the gate and sprockets, forming correct loop lengths without manual intervention—though manual threading and unloading remain possible. it projects at 18 or 5 frames per second forward, with reverse projection available at 18fps. The unit includes a rapid motor rewind and a variable shutter that expands from three to nine blades at 5fps to reduce flicker and prevent film burn. A catathermic filter protects film from excessive heat during operation.
Specifications
| Film format | 8mm |
| Overall dimensions | 10 1/2" x 8 1/2" x 6 1/2" |
| Weight | 15 1/4 lbs. |
| Construction | Cast aluminum; Two-tone grey finish; Carrying handle; Detachable cover. |
| Reel capacity | Reel arms accommodate 400 ft reels. |
| Threading | Automatic threading device feeds the film into position and forms the loops to the correct length; Manual threading and unloading possible. |
| Power | Two versions: 1) 50 cycle 110-240v AC power; 2) 60 cycle 110-125v AC power. |
| Lamp | 8 volt, 50 watt lamp. Modern replacement: CXR 8V/50W |
| Lens | Interchangeable lenses; Originally supplied with a choice of Bolex Hi-Fi f/1.3 lenses of 15mm or 20mm focal length or with the Bolex Hi-Fi f/1.3 12.5-25mm zoom lens. |
| Variable speed | 18 and 5 frames per second forward; 18fps reverse projection; Rapid motor rewind. |
| Other features | Bolex anamorphic lens is easily attached to built-in holder for widescreen projection; Framing knob adjusts the claw for vertical alignment in the gate; Front leg for height adjustment and rear legs for leveling; Variable shutter automatically changes from three to nine blades when projection drops to 5fps; Catathermic filter preserves the film from excessive heating; A table lamp can be attached which switches off when the projector is running and relights again when stopped. |
Design
The lens assembly pivots outward to allow access for cleaning the film gate and unloading film. Both reel arms fold downward for compact storage. The variable blade shutter expands from three to nine blades at 5fps to eliminate flicker and reduce the risk of film burn. Self-lubricating bearings eliminate the need for additional lubrication. The projector includes a film gate, sprockets, a guide post with alignment line, and a switch for operation. It supports forward motion at 5 fps with the lamp on, as well as forward or reverse motion at 18fps with the lamp off.
Context
The 18-5 Auto incorporated the same core design as the original 18-5 projector but added automatic threading of film through the gate and sprockets,
Market
The Bolex logo plate on the side and the detachable lid were glued in place and are often found missing or loose. Included accessories were a plastic zipper cover and a Bolex 400' plastic reel with case. Larger carrying cases with room for accessories were available as optional purchases. Spare drive belts were listed as available in sale listings, One unit sold at auction for £1 including buyer's premium.
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