Mounting adapter for securing a sterile cover on a microscope, microscope for use with an adapter of this type, and system having a microscope of this type and an adapter of this type

A mounting adapter for detachably attaching a sterile cover to an objective of a microscope, the mounting adapter comprising:

• a passage for the insertion of the objective therein, in which a drape-lens or light transparent disc is arranged such that the drape-lens or light transparent disc adopts an oblique angle to a longitudinal axis of the passage;
• a latching device having a ring-shape for an axial holding of the mounting adapter on the objective inserted into the passage, the latching device including at least one retaining post that is placed through a middle of a biasing element, wherein the biasing element enables the latching device to be moved to an open position and return to a locking position to axially hold the mounting adapter on the objective;
• and
• an alignment receptacle configured and arranged to cause a reproducible target angular positioning and/or target rotational alignment of the mounting adapter on the objective exclusively by its axial fitting and further to fulfil its positioning function independently and separately from the latching device.