What is Condenser Lens in a Microscope? Functions of Condenser in a Microscope. Helps Control and Distribute Light; Helps Improve Image Resolution; Helps in Aberration Correction; Helps in Angle Correction; Different Types of Microscope Condensers; Bottom Line: Why is a Condenser Important?

The microscope diaphragm, also known as the iris diaphragm, controls the amount and shape of the light that travels through the condenser lens and eventually passes through the specimen by expanding and contracting the diaphragm blades that resemble the iris of an eye.