The Marumi Close Up 3 Filter is a cost effective solution to add magnification and focus to your standard lens. Macro filters work similarly to reading glasses by enabling you to capture an object/subject close up while maintaining a sharp focus on the object. This allows you to photograph small subjects at full screen. By using a close up filter, you will be able to photograph an object from a shorter distance than your lens is normally able to. Further, it is also possible to combine macro filters to increase the magnification of the lens without extending the exposure time. For example, a macro filter with a 2 diopter used with a macro filter with a 3 diopter provides a 5 diopter set up.