Birtac 17.5mm Camera/Projector

1898 in England
Northern Photographic Works
Birt Acres

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Birtac combined 17.5mm camera and projector
The Kodak Collection at the National Media Museum, Bradford
Science Museum Group Collection

The Birtac camera/projector in ever ready leather case. Designed by Birt Acres, made by The Northern Photographic Works, Barnet, 1899. Cine camera/projector for 17.5mm film (slit standard). Ross lens, No 57581 with Waterhouse stop slot (three stop sin top compartment) on internal rack mount for projection; threraded mount on exterior for taking seperate gates for two functions. Beater intermittent; single continuous sprocket. Direct vision finder, ground glass missing, detached, needs repair (in top compartment).

Designed by the film pioneer, Birt Acres, this was the first British apparatus specifically intended for amateur use. It is shown inside its carrying case, designed so that, by opening flaps to expose the lens and viewfinder, the camera could be operated secretly. It took 17.5mm film, made by slitting 35mm film in half.


Object Number:
brass (copper, zinc alloy), glass, metal (unknown) and wood (unidentified)
deployed: 354 mm x 305 mm x 204 mm,
cine camera
  • tools and equipment
  • equipment by process
  • image making equipment
  • camera (function)
  • tools and equipment
  • equipment by process
  • image viewing equipment
  • image projecting equipment (unit)
The Kodak Collection at the National Media Museum, Bradford

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