Enhanced shutter control for image insertion in a stereo microscope

A stereo microscope comprising:

• a main objective;
• a main observation output configured so that a left-hand beam path and a right-hand beam path are formed between the main objective and the main observation output;
• at least one input reflection beam splitter in each of the left-hand and right-hand beam paths configured to reflect additional information into its corresponding beam path;
• at least one output reflection beam splitter in at least one of the left-hand and right-hand beam paths;
• at least one first switchable shutter associated with at least one of the left-hand and right-hand beam paths, located in front of a corresponding input reflection beam splitter with respect to a path direction of the corresponding beam path, configured to be able to prevent object information from passing therethrough;
• and
• at least one second switchable shutter associated with at least one of the left-hand and right-hand beam paths, located between the main observation output and a corresponding output reflection beam splitter.