Motion picture camera with variable focal length lens

US4103993A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Friedrich Winkler · Unterhaching, DE
• Anton Theer · Munich, DE
• Peter Lermann · Feldkirchen-Westerham, DE
• Volkmar Stenzenberger · Unterhaching, DE
• Peter Griessner · Munich, DE
• Dieter Sandl · Ottobrunn, DE
• Hermann Muller · Bonn, DE
• Herbert Wilsch · Unterhaching, DE

Key dates

• Filing date: Sep 2, 1976
• Grant date: Aug 1, 1978
• Expiry date: Sep 2, 1996

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B3/00
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A motion picture camera with variable focal length lens wherein the zooming collar and the distance selecting or focusing collar on the lens barrel are rotatable to neutral positions by an actuating member which is movable at right angles to or in parallelism with the optical axis of the lens. In such neutral positions of the collars, the focal length of the lens is satisfactory for the making of exposures in daylight or artificial light, and the distance setting corresponds to a distance of 4 to 6 meters to thus guarantee an acceptable depth of field for exposures of subjects located anywhere between closeup and infinity. The actuating member can further close a master switch to allow for starting of the camera motor in immediate response to depression of the release trigger.