Filtro de objetivo BDB de 55mm. - Modelo: CU+3 - Diámetro: 55mm BDB 55mm CU +3 close-up lens filter Type: Close-up filter, also known as a macro filter, which allows a lens to focus closer to a subject. Strength: +3 diopter strength, indicated by "CU +3". Size: 55mm diameter, designed to fit lenses with a 55mm filter thread. Function: Used to achieve macro-like results without needing a dedicated macro lens.