Abstract: A description is given of a telescopic sight with variable magnification, comprising a fixed objective and first image plane assigned thereto, a variable system with second image plane assigned thereto, and a fixed eyepiece for viewing the second image plane and that has a stop in the vicinity of the first image plane whose aperture diameter can be varied as a function of the magnification of the variable system in order to suppress scattered and/or false light.

Abstract: An interchangeable lens (1) with a locking device (2, 2?) for system cameras is described, wherein an orientation marking (4) for mounting the locking device (2, 2?) on the camera is provided at the end of the lens housing (3) facing the camera, and the contact surface (6) of the locking device (2, 2?) has a latching depression (8) at a distance from the orientation marking (4) counter to the direction (7) of rotation of the locking operation and the contact surface (6) contains at least two, preferably six, surface areas (10) which are situated next to one another in an isolated fashion at a distance from the latching depression (8) counter to the direction (7) of rotation within an angle segment of from 100° to 160°, preferably 110° to 150°, and can be detected individually by optical means.

Abstract: An objective adjusting device has a stationary housing, an adjusting ring with an internal thread and a tube, with an external thread, that is guided rectilinearly in an axial direction and carries optical active elements. The adjusting ring is rotatably supported in the housing, and the tube has at least one axially parallel opening with mutually parallel sliding surfaces in which a guide element connected to the housing engages. The guide element is designed as a lug with a sliding head which is adapted in width to the opening and is provided with a slot, of settable slot width, running in a radial direction.

Abstract: Photographic wide angle zoom objective of the retrofocus type having a group of negative refractive power (VG?) comprising four lens components (L1, L2, L3, L4) and being a front group when seen from the object side, and having a rear group of positive refractive power (HG+) including six lens components (L5, L6, L7, L8, L9, L10) and facing an image plane, the distance between the rear group (HG+) and the image plane (BE) being increased, and the distance between the front group (VG?) and image plane (BE) being reduced, during an increase in the focal length, characterized in that the first two lens components (L1, L2) have a negative refractive power when seen from the object side in the light direction, the third and fourth lens components (L3, L4) are grouped into a cemented component with a positive total refractive power and the fifth lens component (L5) has a positive refractive power, the sixth and seventh lens components (L6, L7) are grouped into a cemented component with a positive total refractive p

Abstract: A method for focusing and diopter adjustment in a binocular telescope, in which, for the purpose of diopter adjustment, optical focusing elements (12) in the two telescope tubes (2, 3) can be displaced relative to one another, is distinguished by the fact that, as a result of rotation of a focus drive knob (5), both focusing elements (12) are displaced simultaneously by equal distances via a focus drive, the displacement of at least one of the focusing elements (12) can be locked (13, 14), and, as a result of rotation of the focus drive knob (5), while overcoming a frictional force in the focus drive to the locked focusing element (12), only the unlocked focusing element (12) is displaced.

Abstract: Binoculars having an integrated laser rangefinder has two separate housing parts (1, 2) with eyepieces (16, 17) and objectives (18, 19), which are connected to each other via a jointed bridge (3) for eye width adjustment, and in which the first housing part (1) contains a transmitter (4) and a receiver (5) of the laser rangefinder and also an optoelectronic display element (6) in a fixed arrangement with respect to an optical observation axis (7).

Abstract: A monocular or binocular optical system that is capable of automatically adjusting a diopter setting upon or during a change in magnification in a way that acts to preserve focus and a corresponding method for adjusting a diopter setting to preserve focus upon or during a change in magnification.

Abstract: A photographic objective of the modified double gauss type is presented. The object has a forward group that includes three lens elements (L1, L2, L3) and has the refractive power sequence ++?. The objective also includes an aperture and a rear group including lens elements (L4, L5, L6) of refractive power sequence ?++. The lens element of negative refractive power (L4) is designed as a meniscus with an aspheric surface concave relative to the aperture, and a lens element of negative refractive power (L7) with surfaces concave on both sides is arranged downstream of the last lens element of positive refractive power (L6).

Abstract: A play-free rotary mounting for a drive roll held on stop surfaces in the axial direction on a cylindrical body, wherein V-shaped annular grooves with an opening angle V are provided at least in one of the end faces of the drive roll and the stop surface located opposite them on the body, V-shaped bearing shells with at approximately identical opening angles and approximately identical leg length are inserted into the annular grooves, the vertex diameters of the annular grooves differ from the vertex diameters of the bearing shells. Balls with a diameter matched to the opening width of the bearing shells are inserted into the bearing shells. At least one of the stop surfaces can be adjusted in the axial direction in order to clamp the drive roll in. Instead of different vertex diameters, different opening angles can also be provided for the annular grooves and opening angles for the bearing shells.

Abstract: A lens mount for viewfinder cameras, having a distance setting ring and, coupled thereto, an apparatus for transmitting the set distance to the setting lever of a measuring viewfinder arranged on the camera side. The apparatus contains an outer worm connected to the distance setting ring, an inner worm, inserted in said outer worm and guided rectilinearly in the lens mount, and a cam ring rotatably supported in the inner worm and with an axial cam pointing to the camera on the end face, is characterized in that the cam ring is locked into an annular groove in the inner wall of the inner worm and is provided with preferably two pins which point radially outward over the edge of the inner worm at the end of the camera side, and which engage in each case in an axial groove in the outer worm.

Abstract: An interchangeable objective for integrated rangefinder cameras is described, having a mechanically mounted objective head (1) and a spiral (14) with a bayonet fitting (15), the spiral (14) containing a spiral mechanism (16) for driving an objective head carrier (17) that is guided axially in a straight line and formed as a cylindrical ring, and a focusing ring (18) which is connected to the spiral mechanism (16) and can be actuated from outside, and is characterized in that, for the purpose of inserting a rear mount part (5) of the objective head (1) into the objective head carrier (17), the focusing ring (18) can be released from the spiral mechanism (16) by removing radially oriented connecting means (19) and can be pushed onto a front mount part (3) of the objective head (1), a threaded ring (7) is rotatably mounted on a central mount part (4) of the objective head (1), and the threaded ring (7) can be screwed (26) onto the objective head carrier (17) in order to connect the objective head (1) to the latt

Abstract: An arrangement is specified for rotatable adjustment of a cap (2) on an eyepiece housing (1), with the cap (2) having grooves (3) on its inner face, which rise in the axial direction and have defined latching depressions (4) in the sliding bases (11) of the grooves (3), and pins (5) which point radially outwards being arranged on the eyepiece housing (1) and engaging with sliding bases (11) of the grooves (3) and resting on the sliding bases (11) of the grooves (3) and in the latching depressions (4) in a prestressed manner. The arrangement comprises the pins (5) being mounted in a sprung manner in the eyepiece housing (1).

Abstract: An arrangement for rotatable adjustment of a cap on an eyepiece housing with a stationary pin pointing radially outward from the eyepiece housing and a groove which is assigned to the pin, arranged on the inner side of the cap and rises in the axial direction, is characterized in that, in a plane at right angles to the longitudinal axis of the eyepiece housing, three pins are arranged on the latter, the heads of which pins have at least approximately the same spacing from the longitudinal axis, and in that the sliding bottom of the groove assigned to each pin has a smaller spacing in relation thereto, so that the cap bears against the pins under prestress.

Abstract: An arrangement for rotatable adjustment of a cap on an eyepiece housing with a stationary pin pointing radially outward from the eyepiece housing and a groove which is assigned to the pin, arranged on the inner side of the cap and rises in the axial direction, is characterized in that, in a plane at right angles to the longitudinal axis of the eyepiece housing, three pins are arranged on the latter, the heads of which pins have at least approximately the same spacing from the longitudinal axis, and in that the sliding bottom of the groove assigned to each pin has a smaller spacing in relation thereto, so that the cap bears against the pins under prestress.