52mm multi-coated close-up filter, perfect for close-up photography. : Kenko A set of 2, CLOSE-UP NO.1 and NO.3. Filter size: 52mm. Usage frequency is extremely low, but as it has been stored for a long time, there may be some fine dust, but I think it can be removed with persistent cleaning. I couldn't do it myself. Also, there are no scratches or stubborn dirt.