A macro lens is designed specifically for capturing images of objects that are very close to the camera, typically at a much higher level of detail than standard lenses can achieve. This makes it ideal for photographing small subjects such as insects, flowers, or intricate details in other objects. By allowing the photographer to focus closely, macro lenses enable a sharp representation of fine textures and details, showcasing elements that are often not visible to the naked eye.
While other options refer to different photographic techniques or types of lenses, they do not correctly define the primary use of a macro lens. Wide landscapes require wide-angle lenses, filming moving subjects may involve telephoto or fast lenses, and creating depth of field typically relies on lenses with specifics that differ from macro lenses. Thus, the distinct characteristic of a macro lens is its ability to focus on very minute details close to the camera, making it a specialized tool for such photography.