Abstract: A bracket for holding binoculars, the bracket having a cylinder shaped receptacle with a cylinder wall with an opening that extends between a first rim and a second rim of the cylinder wall. The first rim of the cylinder wall has a stop collar extending in an inward direction. An aperture is formed between the first rim and the second rim that is configured to receive a protrusion of an object to be held by swiveling the protrusion into the aperture for positively interlocking therewith. The bracket may be mounted on a tripod or on some wall of a hunter's raised blind for holding binoculars.

Abstract: The invention relates to an adjustment turret having lockable and optionally freely adjustable scale/indicator rings and a symbolic display of the respectively locked or freely adjustable rings.

Abstract: Disclosed is an image recording device, wherein the image sensor acquires an image data set onto an image area of the image sensor. The position sensor detects a spatial position of the image area relative to a reference direction and provides position data that specify both an angle of rotation and a tilt angle of the image sensor. The evaluation unit determines, from the position data, a projective transformation that maps the image data set onto a projection plane, which is tilted with respect to the image area, in dependence on both the rotation and the tilt. The evaluation unit determines an image section in the projection plane for the image data set mapped onto the projection plane by a projective transformation and displays the image section with at least a region of the imaged scene that lies within the image section in the graphical user output interface.

Abstract: A telephoto lens having an entrance pupil of between 80 and 110 mm includes a lens head and a focusing component. The lens head, as a first optical assembly, consists of four lens elements with a refractive power sequence that alternates in the light direction. The focusing component is a second optical assembly made of at least two lens elements and has a relative aperture of between 1:4.5 and 1:7.

Abstract: The present invention relates to an objective for photographic applications, comprising, in a sequence from an object side end to an image side end, a first lens group having a positive refractivity with at least one lens, a second lens group having a negative refractivity with a single lens, a third lens group having a negative refractivity with a single lens and a fourth lens group having a positive refractivity with at least one lens, wherein the lenses of the second and third lens groups each have a concave surface which face one another and define an air lens, wherein f1 is the overall focal length of the lenses of the second and third lens groups and f2 is the focal length of the air lens, and wherein the relationship 5.0?f1/f2?9.0 is true.

Abstract: A sensor unit for an image recording device comprises an optoelectronic image sensor and a cover unit arranged in front of the optoelectronic image sensor. The cover unit comprises a first absorption glass and a second absorption glass, wherein the first absorption glass is configured as a UV absorption glass and the second absorption glass is configured as an IR absorption glass.

Abstract: A long-range optical sighting device includes a housing, which comprises an objective, an eyepiece, a reversing system and a target mark. The target mark illumination is switchable and controllable via an operating platform. The operating platform has one or a plurality of manually actuatable switches arranged on the housing in the region of the eyepiece, on the top of the housing in the operating position, and a power supply. Control electronics and a light-sensitive sensor system for detecting the ambient brightness are integrated in the operating platform and/or the housing in the region of the eyepiece. The operating platform comprises one or a plurality of light entrance openings for the light-sensitive sensor system in the direction of the objective.

Abstract: A lens with a fixed focal length includes five lens-element groups, a first front lens-element group, a second lens-element group, a third lens-element group, a fourth lens-element group, and a fifth back lens-element group is arranged in a stationary manner. Relative to an imaging plane in a lens barrel and both the focusing front group and the focusing back group are movable jointly relative to one another and to the lens-element groups arranged in a stationary manner in order to focus the lens on objects at different object distances.

Abstract: A lens with a fixed focal length, includes five lens-element groups, a first front lens-element group, a second lens-element group, a third lens-element group, a fourth lens-element group, and a fifth back lens-element group that is arranged in a stationary manner. Relative to an imaging plane in a lens barrel and both the focusing front group and the focusing back group are movable jointly relative to one another and to the lens-element groups arranged in a stationary manner in order to focus the lens on objects at different object distances. The front lens-element group and the back lens-element group have a negative refractive power.

Abstract: A lens with a fixed focal length comprising including a first front lens-element group, a second lens-element group, a third lens-element group, a fourth lens-element group, and a fifth back lens-element group. Relative to an imaging plane in a lens barrel and both the focusing front group and the focusing back group are movable jointly relative to one another and to the lens-element groups arranged in a stationary manner in order to focus the lens on objects at different object distances. The front lens-element group has a positive refractive power and the central group and the back lens-element group have a negative refractive power.

Abstract: The present invention relates to an optical lens system for a camera comprising in an order from an end at the object side to an end at the image side a first lens having a positive refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, and a fourth lens having a negative refractive power, wherein the second and third lenses are each designed as meniscus lenses, wherein the surface of the second lens at the object side is convex and the surface of the third lens at the object side is concave. The invention further relates to an imaging system having an image sensor that has a plurality of light-sensitive elements arranged in rows and columns and having such an optical lens system.

Abstract: A device is provided for establishing or releasing the coupling between an adjustment ring, which can be rotated on a base element by way of a detent mechanism and is provided with an adjustment shaft for optical elements, and a cylindrical index ring, which is inserted between the adjustment ring and the base element so as to rotate in relation to an index mark provided on the base element, wherein an inwardly directed ring surface is integrally formed on the edge of the index ring pointing toward the adjustment ring, at least one friction element under spring pressure is inserted between the adjustment ring and the ring surface, and the spring pressure can be removed by way of a pressure element inserted into the top face of the adjustment ring or by way of a lever mechanism.

Abstract: An objective arrangement includes an outer holder, and optical elements held therein, in an inner holder. A rotor is configured as a cylinder element forming a circumferential groove, having permanent-magnet elements disposed on at least one inner wall surface. A stator consists of a cylindrical coil, which inserted into the groove, locally fixed in the axial direction, for an electromagnetic interaction with the magnet elements, coaxially to the axis of rotation of a curved support. The curved support is arranged separate from the outer holder and the inner holder.

Abstract: The invention describes a focal length extender for a telescopic imaging system with interchangeable viewing eyepieces, including a cylindrical housing, which has a first and a second stop plane which are perpendicular to its cylinder axis in the direction of the light with associated connecting elements to the telescope body and for interchangeable viewing eyepieces and in which the housing has a relay lens arranged between the first stop plane and the second stop plane, wherein the relay lens is divided in two and consists of a first positive, neutral or negative lens element and a further negative lens element, wherein between the first and the further lens element, a beam splitter surface is arranged downstream at an angle to the optical axis of the imaging system and the first and further lens element together with the distance therebetween has an overall negative refractive power.

Abstract: Wide-angle lens comprising floating element (G2) and aperture stop (BL) comprising a group (G1) of ten lens elements with refractive power sequence arranged in a manner mirrored in sign with respect to the stop (BL), wherein lens elements having positive and negative refractive power are arranged alternately in the light direction upstream and downstream of the stop (BL) and the group (G1) is displaceable for the purpose of focusing.

Abstract: Wide-angle lens comprising floating element (G2) and aperture stop (BL) comprising a group (G1) of ten lens elements with refractive power sequence arranged in a manner mirrored in sign with respect to the stop (BL), wherein lens elements having positive and negative refractive power are arranged alternately in the light direction upstream and downstream of the stop (BL) and the group (G1) is displaceable for the purpose of focusing.

Abstract: A compact modified retrofocus-type wide-angle lens with a constant overall length during focusing is described, comprising, as seen from the object, a stationary front group (G1) with positive refractive power and a rear group (G2) with positive refractive power facing an image plane (IM), comprising an aperture stop (AP) arranged therebetween in a stationary manner, wherein the rear group (G2) consists of a first rear group portion (G2a) being displaceable along the optical axis and a second rear group portion (G2b) stationary in relation to the image plane (IM), wherein the first rear group portion (G2a) and the second rear group portion (G2b) have positive refractive power and the distance between the first rear group portion (G2a) and the front group (G1) reduces during focusing from infinity to close range.