To study the uppermost layer of a painting, a researcher can use an optical microscope. There are various kinds of microscopes, varying from small sizes that magnify 3 to 10 times to large ones that magnify up to 50 times. Magnification with optical lenses helps us to learn more about the condition of the painting and certain material features. It reveals details of brushstrokes, the nature of the pigments, the texture of the paint layer, restorations and damages. A camera can be attached to the microscope to take highly magnified photographs of the work of art, known as micrographs.