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 made by Bolex from 1963 to 1966. It threads itself. The film feeds through the gate and sprockets and forms the correct loop lengths with no help, though you can still thread and unload by hand. It projects at 18 or 5 frames per second forward, and in reverse at 18fps. It has a rapid motor rewind and a variable shutter that goes from three to nine blades at 5fps to cut flicker and keep the film from burning. A catathermic filter keeps excess heat off the film.
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 so you can clean the film gate and unload film. Both reel arms fold down for storage. The variable blade shutter goes from three to nine blades at 5fps to get rid of flicker and lower the risk of film burn. The bearings are self-lubricating, so they need no extra oil. The projector has a film gate, sprockets, a guide post with an alignment line, and an operating switch. At 5 fps it runs forward with the lamp on. At 18fps it runs forward or reverse with the lamp off.
Context
The 18-5 Auto uses the same core design as the original 18-5 projector, but adds 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 both are often found missing or loose. It came with a plastic zipper cover and a Bolex 400' plastic reel with case. Larger carrying cases with room for accessories were optional. Sale listings show spare drive belts as available. One unit sold at auction for £1 including buyer's premium.
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