What Is The Objective Lens Used To Locate The Specimen And First Focus. Occasionally when switching to the highest magnification lens you may need to make a slight adjustment to the fine focus but this is not required when you start out with the 4x lens. Course adjustment is the first to be used to locate the specimen and only with the low power objective.
The fine adjustment knob is used to focus the microscope. These objectives are specialized objectives that require the objective to have a drop of immersion oil between the objective lens and the slide coverslip over the specimen on the slide. Before using immersion oil make sure that your 100x objective lens is made for use with immersion oil.
The flat platform where you place your slides.
The coarse and fine focus knobs on a microscope enable you to adjust the focus of the microscope to get the best view of the specimen possible. Used to handle the microscope properly. This is brought very close to the specimen being examined so that the light from the specimen comes to a focus inside the microscope tube. Remember to use the coarse focus knob only with the 4x objective and the rest of the time use the fine focus knob.
