Patent ID: 6859312

Claim:
A microscope, comprising: a plurality of objective lenses that can each be positioned proximate to a specimen, wherein the magnification of each objective lens is different from the magnification of each other objective lens; optical apparatus for transmitting light to the specimen and for transmitting light reflected from the specimen through an operable one of the plurality of objective lenses; viewing apparatus for acquiring a magnified image of the specimen produced from the reflected light; and a bellows positioned between the operable objective lens and an image formation plane of the viewing apparatus, wherein: at least one of the operable objective lens and the image formation plane of the viewing apparatus is movable in response to expansion or contraction of the bellows to vary the distance between the operable objective lens and the image formation plane of the viewing apparatus and thereby change the magnification of the magnified image; and expansion of the bellows from maximum contraction to maximum expansion increases the magnification of the magnified image from that of the operable objective lens to a magnification that is equal to that of the objective lens, if any, having a next highest magnification.