Motic BA210E, Instruction Manual

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CONVENTIONAL MICROSCOPE
The conventional microscope has a two-stage magnification system. There are two lens systems, the
objective and the eyepiece, mounted at opposite end of a body tube. The objective forms an enlarged
real image of the object being examined and is called intermediate image. The intermediate is further
enlarged by the eyepiece and is seen as a virtual image of the intermediate image. The eye can
examine this final image, situated at infinity. The total magnification of the microscope is determined by
the focal lengths of the objective and eyepiece, and can be calculated as objective magnification X
eyepiece magnification. For instance, 40x objective X 10x eyepiece = 400x magnification.