This Close-Up Filter Kit (+1, +2, +4, Macro) Is A Set Of 4 Close-Up Lens Filters For Use In Achieving Macro-Like Results With Almost Any Lens You Pair Them With. Close-Up Lenses Are Essentially Diopters That You Place Over Your Lens In Order To Lessen The Minimum Focus Distance By The Amount Specified On The Filter. You Can Combine The Filters Together To Increase Their Strength And To Fine Tune Your Close-Up Settings. These Filters Are Constructed From Premium Grade Optical Glass And Feature Dual Threads For Ease When Combining With Other Filters. A Filter Wallet Is Included With The Kit For Protection And Keeping Your Filters Together.- These Filters Decrease The Minimum Focus Distance Of Any Lens, Providing Macro-Like Results- +1, +2, +4, And +10 Strengths Allow You To Vary And Modify Your Desired Close-Up Amount- Dual Threading Permits You To Combine The Filters Together For Higher Magnification Or Pair With Other Types Of Filterstech Specstype: Macro/Close-Up Filter Kitsize: 52mmcoating: Single-Coatingrotating: Nomounting: Screw-On Filter Threads