A macro lens is a specialized camera lens designed for capturing close-up images of small subjects, such as insects, flowers, or intricate details of objects. These lenses allow photographers to focus on subjects at a very short distance, often producing images with a 1:1 magnification ratio, meaning the subject appears life-sized on the camera's sensor. Macro lenses are commonly used in photography to reveal details that are not visible to the naked eye. They can be used on various camera systems, including DSLRs and mirrorless cameras, and are popular among nature photographers and hobbyists who enjoy exploring the beauty of small-scale subjects.