When focusing the microscope, be careful that the objective lens doesn’t touch the slide, as it could break the slide and destroy the specimen.Specimen or: The specimen is the object being examined. The viewer spins the nosepiece to select different objective lenses.: One of the most important parts of a compound microscope, as they are the lenses closest to the specimen.A standard microscope has three, four, or five objective lenses that range in power from 4X to 100X. The eyepiece usually contains a 10X or 15X power lens.Diopter Adjustment: Useful as a means to change focus on one eyepiece so as to correct for any difference in vision between your two eyes.Body tube (Head): The body tube connects the eyepiece to the objective lenses.Arm: The arm connects the body tube to the base of the microscope.Coarse adjustment: Brings the specimen into general focus.Fine adjustment: Fine tunes the focus and increases the detail of the specimen.Nosepiece: A rotating turret that houses the objective lenses. Eyepiece: The lens the viewer looks through to see the specimen.
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