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Unformatted text preview: objective lens. Use the coarse adjustment know to slowly raise the lens from the stage while viewing the image. Fine focusing is not needed when using the lowest magnification (scanning or 4X objective). If you are using any of the other objectives, it will be necessary to use the fine focus after using the coarse focus. Adjust the condenser so that a sharp focus is produced. This step is important at the highest magnification (oil immersion or 1000X). Adjust the iris diaphragm. This will need readjustment after changing to a different magnification....
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- Fall '10
- Biology, Telescope, Aperture, objective lens