A 67mm 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).
These lenses can be used individually or in any combination to achieve a ultra-close focusing distance.
The maximum magnification achieved with these attachments will depend on the focal length of your lens as well as the actual close focusing capability of that particular lens.
NOTE: A +1 combined with a +2 will equal a +3, while a +2 combined with a +4 will equal a +6, and so on.
Hoya 67mm Close-Up Lens Kit (+1