A close-up attachment is a camera accessory that allows a lens to focus on subjects closer than its normal minimum focusing distance. These attachments, often in the form of lens filters or auxiliary lenses, are widely used in macro photography, product photography, and detailed close-up shots, enabling photographers to capture fine textures and small subjects with sharpness and clarity. By extending a lens's focusing capability, close-up attachments provide an affordable and versatile way to achieve detailed, professional-quality images without investing in a dedicated macro lens.