- Light Source: Provides the illumination necessary to visualize the specimen. - Condenser Lens: Focuses light onto the specimen. - Objective Lens: Magnifies the image of the specimen. Different objective lenses (e.g., 4x, 10x, 40x, 100x) provide varying levels of magnification. - Eyepiece (Ocular Lens): Further magnifies the image produced by the objective lens, typically 10x magnification. - Stage: Holds the slide in place and allows for movement to view different areas of the specimen. - Focus Knobs: Coarse and fine adjustments to bring the specimen into sharp focus.