Macro photography is close-up photography of usually very small subjects. The classical definition is that the image projected on the “film plane” is close to the same size as the subject.In recent years, the term macro has been used in marketing material to mean being able to focus on a subject close enough so that when a regular 6×4 inch print is made, the image is life-size or larger. With 35mm film this requires a magnification ratio of only approximately 1:4, which demands a lower lens quality than 1:1. With digital cameras the actual image size is rarely stated, so that the magnification ratio is largely irrelevant; cameras instead advertise their closest focusing distance.
