Patent ID: 7253949

Claim:
A stereo microscope comprising: a hollow elongated body having opposite ends and enclosing first and second optical paths extending through the microscope, one of said ends having two oculars, each including an ocular lens assembly, a prism assembly in each optical path adjacent each ocular, a lens magnification changer rotatably mounted about an axis and located intermediate the ends of said hollow elongated body, a first series of bores located about the periphery of said lens magnification changer in a common plane and extending diametrically through said lens magnification changer, a second series of bores located about the periphery of said lens magnification changer in a common plane and extending diametrically through said lens magnification changer, a third series of bores located about the periphery of said lens magnification changer in a common plane and extending diametrically through said lens magnification changer, said second series of bores being axially located between said first and third series of bores of said lens magnification changer, said bores of said first and third series each including a lens assembly, the other of said ends of said hollow elongated body including an objective lens.