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January, 1931 The INTERNATIONAL PHOTOGRAPHER One
C O L O R
with your Bell & Howell
A fact of interest and importance to cameramen and producers— your regular Bell & Howell Cameras can be used for the Bi-Pack color processes.
A special intermittent mechanism, an adaptation of the famous B & H pilot pin mechanism, is used to handle the two negatives. This unit is readily interchangeable with the regular, ultra-speed, or silenced mechanisms. Simply by changing this mechanism and, of course, the magazine and the film, any Bell & Howell Camera can be converted for color from monochrome, and vice versa, at a moment's notice.
The new mechanism is so constructed that the focal plane of the Bi-Pack films (which are run emulsion to emulsion) is in exactly the same position as the focal plane of the black and white film in the regular mechanisms. There is no necessity for any change or adjustment on the camera itself — the focusing ground glass is left in the standard position.
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The new Cooke Speed Panchro and Panchro lenses are also ideal for Bi-Pack color processes, as they are corrected to the wave lengths utilized by the Bi-Pack emulsions. Their special correction adapts them equally well for modern monochrome work with panchromatic film and incandescent lighting.
Write for further information on B & H Cameras or these new Cooke lenses.
BELL & HOWELL
BELL&HOWELL CO., 1849 Larchmont Avenue, Chicago, Illinois New York, 11 West 42nd Street • Hollywood, 6324 Santa Monica Blvd. London (B&H Co., Ltd.) 320 Regent Street • Established 1907