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Coarse adjustment (4)
** Fine adjustment (5)
* Stage (to hold the specimen) (6)
* Light source (a light or a mirror) (7)
* Diaphragm and condenser (8)
* Mechanical stage (9)

Eyepiece (ocular lens)

The eyepiece, or ocular lens, is a cylinder containing two or more lenses; its function is to bring the image into focus for the eye. The eyepiece is inserted into

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