Aerotronica 69

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The Aerotronica 69 is an aerial camera made by Linhof in 1983.[1] It makes 6x9-cm images on 70 mm film in a motorised magazine, allowing 320 exposures in one load.[1][2] Lenses from 75 to 480 mm in focal length can be mounted by means of an adjustable lens-tube.[3]

The camera relies on an innovative focal-plane shutter, composed of two discs, each with a slit, rotating continuously at slightly different speeds. A third shutter covers the rotating discs, and is opened to allow an exposure. [4] The speed of the rotation of both discs is adjustable, giving a range of six speeds between 1/500 and 1/1500 second.

The camera has a frame-finder, with red and green LED indicator lamps in the eyepiece loop; these presumably indicate the state of readiness of the camera.

The camera can be powered by mains electricity or a battery pack.[3] A data-back was made for the camera.[3]


Notes

  1. 1.0 1.1 History page at the Linhof website.
  2. Aerotronica 69 serial no. 9421055, with Tele-Arton 250 mm f/5.6, sold at the 24th Westlicht Photographica Auction, on 23 November 2013.
  3. 3.0 3.1 3.2 Linhof cameras including the Aerotronica 69, at Galerie-Photo (text in French).
  4. German Patent 3316009, Rotationsschlitzverschluß für Fotographische Kameras (Rotating slit-shutter for cameras), filed May 1983 and granted November 1984 to Linhof Präzisions-Kamera-Werke GmbH, and Bibliographic Data page for the Patent, including English translation of the abstract, at Espacenet, the patent search facility of the European Patent Office.