... quality 2.The filters come in 4 different strengths: +1, +2, +4, +10 3.Enough Stock Specification ... of the lensThe filters come in 4 different strengths: +1, +2, +4, +10You can use the filters ... individually or combined (+1 plus +4 will become +5)Dimensions:External diameter ... Sigma, Tamron, Minolta, and other manual lens etc.)Included:1 x 58mm +1 Close Up Lens1 x 58mm +2 Close ...