Hoya 52mm Close-Up Filter Set

A 52mm close-up filter set comprising of a +1, +2, and a +4 close up filter. When equipped each close-up filter will allow your lens to focus closer than it originally could.
Each filter has a unique strength/diopter, with +1 being the least powerful (only giving a small decrease in minimum focusing distance), and +4 being the most powerful (giving a decent decrease in minimum focusing distance).