Magazine article American Cinematographer

Lighting Developments Exhibited at Photokina 1980

Magazine article American Cinematographer

Lighting Developments Exhibited at Photokina 1980

Article excerpt

Based on a careful survey of the trends, this will perhaps be remembered as the year of arc lamps and plastic luminaires for photographic lighting

The major lighting developments introduced at PHOTOKINA '80 center on the introduction of new arc lamps and the use of plastics in luminaire housings. Beyond this there is the ability to dim arc lamps, such as the HMI, and use both HMI and CSI/CID lamps in the same luminaire. The arc lamp has thus become a mjor concern in photographic lighting and projection systems.

The HMI arc lamp was introduced eleven years ago by Osram for use in TV location lighting. It has slowly found its way into the film lighting market and with its acceptance has come a multitude of manufacturers of this source. Several years ago GEC, an English lamp manufacturer, became the first company to provide competition for Osram. During the past year, ILC, a California lamp manufacturer, joined the competition and now GEC, ILC and Philips offer a full line of HMI type lamps.

At PHOTOKINA, Sylvania added the 2500-watt lamp to their previously announced 572- and 1200-watt lamps. Since Mitsubishi had shown the HMI type lamp at a past PHOTOKINA, the competition within this market is now becoming brisk.

The CSI lamp was introduced by Thorn of England over 15 years ago as a projection lamp. About ten years ago it was incorporated into a PAR 64 reflector lamp for use in TV location lighting, especially for sports facilities. About two years ago, in the interest of improving the color of the CSI lamp, Thorn introduced the CID lamp. Since the CSI/CID lamps are of single-ended construction, they provide many advantages in their mounting and optical control capabilities. At PHOTOKINA, Thorn introduced a 2500-watt CID lamp with a Mogul Bipost (G 38) base and 5-inch LCL for direct use in 2Kw fresnel luminaires. This lamp, along with the 1000-watt open, as well as PAR 64 enclosed CID lamps, meet the color requirements of daylight film.

A CSI lamp of 185 watts was also introduced by Thorn. This lamp is being made with atwo-pin prefocus (GY9.5) base, as well as integrated into a reflector assembly for projection systems. The open lamp was being demonstrated in a battery-operated luminaire for remote TV applications. At PHOTOKINA, Kobold, Ryudensha, Arri, LTM, Lee, Blossl and Cima all had 200-watt battery operated HMI Systems which suggests good potential for this new Thorn CSI lamp.

In the projection lamp market not only was there a 185-watt Thorn CSI lamp with integral reflector, but also 250 and 400-watt Osram HTI lamps and a GE Gemini 300-watt lamp. These lamps have been developed for the 8mm and 16mm film projectors. The Gemini 300 is a direct replacement for the Marc 300 with a 25 percent efficacy increase. A French company, Hardware S.A.R.L., demonstrated a 575-watt HMI 35mm slide projector. Overhead projectors have also used the 575-watt HMI, 400- and 1000-watt CSI and 400-watt HCI lamps from Osram, Thorn and Philips. Philips also has a 400- and 1000-watt HPI lamp for episcopes. The use of arc lamps in projection systems is therefore expanding rapidly.

The introduction at PHOTOKINA by Philips of the 220-watt tin-halide short arc lamp provides another single-ended lamp with a two-pin prefocus (GY 9.5) base. They indicate that this lamp will be extended to 500- and 1000-watt types early next year. This lamp has minimum flicker and good daylight color which makes it very desirable for photographic applications. This lamp size and construction makes it almost a direct replacement for the FEL single ended. …

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