The nose piece of a microscope is responsible for holding multiple lenses that can be adjusted. This adjustment allows the viewer to look at the object under different levels of magnification.
To discover the appropriate level of magnification needed for accurate viewing of the sample, the viewer starts with the lowest setting on the microscope. The viewer then turns the nose piece to the next level of magnification. This process continues until the viewer achieves the appropriate level of magnification.
Alternative names for the nose piece on a microscope include revolving nose piece or turret. The lenses used to view samples are called objective lenses.