ADJUSTING MECHANISM FOR ZOOM LENS SYSTEM

A motion picture camera includes a taking lens system having a zooming component and a compensating component which are movable in opposite linear directions for varying the magnification of the system. These components are carried by lens mounts attached to sleeves slidably mounted on rods. Each sleeve carries a pin which is inserted in slots in opposite ends of a linking lever. That lever is pivoted in a camera housing about a point intermediate its ends. One of the sleeves is also attached to the end of a second lever by a pin-in-slot arrangement. The second lever is pivotally mounted in the housing intermediate its ends, and the other end of the second lever is flexibly attached to a slide which is linearly movable along a path perpendicular to the axis of rotation of the second lever and spaced therefrom. A manually operable zooming knob is connected to the slide via a cam, whereby rotation of the zooming knob moves the slide and thereby the zooming elements. The knob is rotatable through 360 DEG , and detents are provided in the cam surface to indicate maximum wide angle and maximum telephoto positions.