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: 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 telescope comprising a lens (3) and a focussing member (5) which can be displaced by means or a focussing adjustment ring (12), whereby the basic position thereof can be adjusted by a lockable diopter adjustment ring (13), also comprising a reversing system (4) and an eyepiece (6), characterised in that a cam disk (20) for displacement of the focusing member (5) is associated with the diopter adjustment ring (13) when the eyepiece (6, 7, 8) is used with modifiable enlargement, whereby said cam disk (20) can be displaced by a value which is dependent upon the diopter adjustment and modification of the enlargement of the eyepiece.