microscope lens used to locate the specimen
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Which specimen?
To locate a specimen using a microscope, you typically use the lowest magnification lens, which is called the scanning lens or low power objective. This lens typically has a magnification of 4x or 10x. Here is how you can locate the specimen using this lens:
1. Start by placing the specimen slide on the stage of the microscope and secure it in place using the stage clips if necessary.
2. Turn on the microscope and adjust the lighting if needed. Adjust the condenser to control the intensity and focus of the light.
3. Adjust the coarse focus knob to lower the objective lens close or near to the slide. Be careful not to touch the slide with the objective lens.
4. Look into the eyepiece and use the coarse focus knob to raise the objective lens gradually until the image comes into focus. Start by positioning the objective lens about halfway up to avoid crashing the lens into the slide.
5. Slowly move the stage using the stage control knobs in a left-right and up-down motion until the specimen comes into view. The scanning lens has a wide field of view, so you can easily locate the specimen.
6. Once you locate the specimen, you can then switch to higher magnification lenses, such as the medium power or high power objectives, to observe it in more detail.
Remember to always handle the microscope with care and avoid touching the lenses directly with your fingers. Additionally, use the fine focus knob for fine adjustments to achieve a clearer image of the specimen.