Carl-zeiss-stiftung

Arnold and Richter Cine Technik Gmbh and Co.

Karl Herzog

Eugen Bayerl

Christian Ludwig

Pavel Filous

Kurt Wallner

Kurt Bednarsky

Siegfried Grosser

The invention relates to a drive unit for the adjustment of the zoom, focus or iris ring of a camera lens. According to the invention, the drive unit comprises a drive shaft arranged parallel to the axis of the camera lens, a pin and groove arrangement for allowing axial displacement of the drive shaft, a pinion connected to the drive shaft and coupled to the external teeth of a lens ring of the camera lens, and two circular flanges connected to the drive shaft and for embracing a sector of the lens ring to pull along the drive shaft and the pinion as the lens ring moves axially. The invention creates a drive unit which allows adjustment of a lens ring even if the lens ring is displaced axially.

Drive unit for the adjustment of a zoom, focus or iris diaphragm for

A lens mount, especially but not exclusively for use with motion picture cameras, with special means for preventing transmission of noise through the lens mount from operation of moving parts within the camera to a microphone located in front of the camera. A focusing lens mount has two mounting parts which are movable axially relative to each other, and with a small clearance space between these two parts. An annular groove is provided, extending circumferentially around a cylindrical portion of one of these mounting parts. In this groove is a sound damping or impeding element, resiliently pressed against a companion cylindrical surface on the other of the mounting parts, to block passage of sound through the clearance space between the two cylindrical parts. The sound damping element is made of material having good dry-sliding characteristics.

Lens mount with noise reducing means

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Taufkirchen, Germany

Karl Herzog