Abstract: The invention relates to an actuator element for setting the position of a target mark of a sighting telescope having a front module and a rear module, and the front module and rear module are connected to one another by means of a coupling mechanism, which coupling mechanism can be manually actuated in order to separate the front module from the rear module.

Abstract: The invention concerns a reversing system for a sighting telescope, where the reversing system has at least two mutually displaceable lenses in a tube of the reversing system parallel to an optical axis of the reversing system, where displacement of the at least two displaceable lenses modifies the reproduction scale at which an image projected onto a first image plane of the reversing system is shown on a second image plane of the reversing system, where the at least two displaceable lenses are arranged in all positions between the first and the second image plane, where a surface of the inside of a tube facing the optical axis having at least one absorption area with absorption zones for absorbing incident light and with sliding surfaces located between neighbouring absorption zones for bearings of the at least two displaceable lenses, where the total area of the sliding surfaces is smaller than the total area of the absorption zones, where the at least one sliding surface is arranged at a different distanc

Abstract: The invention relates to an actuator element for setting the target mark of a sighting telescope having a rear housing, a spindle mounted in the rear housing so as to be rotatable about an axis of rotation, a setting knob for moving the spindle in the rear housing and with a retainer for fixing the setting knob relative to the rear housing. The retainer comprises detent toothing in the setting knob extending around a circumference, at least one retaining element engaging with the detent toothing and at least one lock bar for positively fixing the retaining element in a recess of the detent toothing. The retaining element is mounted in an intermediate housing connected to the rear housing in a non-rotating arrangement.

Abstract: The invention relates to an actuator element for setting the position of a target mark of a sighting telescope having a front module and a rear module, and the front module and rear module are connected to one another by means of a coupling mechanism, which coupling mechanism can be manually actuated in order to separate the front module from the rear module.

Abstract: The invention relates to a protective cap for a lens or ocular end of an optical device, such as an observation device, with an end wall and with a tubular cap casing extend around at least certain regions of the end wall. The end wall comprises at a first layer in at least certain regions and an insert part made separately from it, and the material of the first layer or insert part has a higher modulus of elasticity than the material of the cap casing.