London, South Kensington
25 July 2007
Wall sound camera no. 934
St. George Recording Equipment Corp., New York; 35mm., black-painted alloy body, electric motor, Modulite optical sound recording head, internal sound apparatus including volume control and motor speed control, side-mounted viewfinder and gate viewing tube, top-mounted 1000ft. magazine, four lens turret holding a Bausch & Lomb Baltar f/2.3 25mm. lens no. KF497, a Taylor Hobson Cooke Speed Panchro f/2 35mm. lens no. 235103, a Bausch & Lomb Baltar f/2.3 40mm. lens no. VF490, a Bausch & Lomb Baltar f/2.7 152mm. lens no. UF7941R; a matte box in case; a Fearless tripod with bowl head and wooden legs
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H. Griffin, 'The Wall Motion-Picture Camera', in Journal of the S.M.P.E., October 1935, vol. 25 no. 4, p. 363-366
Griffin states, 'The Wall camera was originally developed in 1926 and 1927 for newsreel work and has recently been redesigned for use either in the studio or in the field. The camera can be equipped with either light-valve, flashing lamp, or galvanometer.'
The light-valve referred to would produce a variable density track photographically recorded onto the film and the mirror galvanometer would produce a variable area track. This latter system is fitted to no. 934 and became the more widely adopted.
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