Abstract: A system for determining at least one optical property of a lens system, comprising: a position sensitive detector 25 for generating image data representing an image projected onto the detector, and a controller 41 configured to receive the image data, to perform a first analysis of the image data in order to determine an identifier of a partial pattern contained in the image represented by the image data, to perform a second analysis of the image data in order to determine at least one property based on the image of the partial pattern, and to generate data representing the at least one optical property of the lens system associated with an image position of the image based on the determined at least one property.

Abstract: The baffle plate for a lens of a movie or TV camera has an add-on tube that can be slipped onto the camera lens with little clearance. The add-on tube is provided with a swivel arm, which has a swivelling axis which is fixed with respect to the camera lens and which is located in parallel to the rear plane of the add-on tube and in or behind this plane and is positioned such that the distance to the opposite rear inner edge of the add-on tube which is slipped onto the camera lens is approximately equal to or larger than the distance to the front outer edge of the camera lens. The clearance between the add-on tube and the camera lens is from 0.5 mm to 1 mm.

Abstract: An apparatus is used to manually set a parameter of a lens of a television, video or studio camera, and especially to set the distance between the camera and an object which is to be photographed. The apparatus which is connectable with the camera, has a hand wheel that can be rotated about an axis of rotation, as well as an adjusting wheel that can be connected through a gear mechanism with the hand wheel to engage a corresponding wheel at the lens for setting the parameter. Two stops, which can be adjusted variably relative to one another and fixed at different angular positions, are provided for limiting the angle of rotation of the hand wheel. A counterstop, arranged in the path of the two stops, is connected torsionally rigidly with the hand wheel.

Abstract: In the proposed gobo (11), the diaphragm mask (13) is placed on a stationary surface, especially of a planar member, and has an aperture (27) of the gobo substantially adjustable along the stationary surface or planar member according to the focal length used. The diaphragm mask has two curtains (15, 16), preferably adjustable in pairs in opposite directions, which limit the free aperture of the gobo depending on the focal length used. The curtains are adjusted by electromotors (M1, M2) via belts (19, 21), rollers (20, 22), and bevel gears (25, 26). The motors (M1, M2) are controlled by a controller (28) and, via potentiometer readings, receive as input signals the adjustment values of the lens for focal length and focus.

Abstract: A mounting for a sun shade, a filter or both for the usual bulky lens of a professional video camera can be moved forward or backward parallel to the lens axis on two parallel guide rails (3, 4), the rear ends of which are fixed on a frame (18) supported forward of the lens mounting support (9) by rods (25, 26) and a structure (9) which supports the lens. On the guide rails extending foward from the frame (18) there is mounted a back-and-forth shiftable articulation device (10, 13, 14) which permits swinging of its outer member (14), only in the forward position of the device, about the articulation joint (13). Movement of the accessory towards and away from the lens is driven by an eccentric arm (19) which is linked to a swinging member (22) for transmitting linear motion. A manipulation member 21 serves to move the eccentric arm 19.