Patent ID: 7369306

Claim:
An ancillary module for mounting to a microscope main objective defining a focal length, the ancillary module having an end facing toward said main objective and comprising: an adjustable focus optic system for varying said focal length of said main objective along a convergent beam path; a system for image reversion assigned to said focus optic system and being mounted in said convergent beam path; said system for image reversion being disposed on said end of said ancillary module facing toward said main objective to facilitate mounting said ancillary module to said main objective; said system for image reversion being configured as a system for beam transposition of at least two binocular viewing beam paths; said ancillary module being arranged below said main objective in said convergent beam path; wherein said system compensates focus and parallax differences of said at least two binocular viewing beam paths; and, wherein said system for image reversion can be switched into and out of the beam paths.