NiSi Close Up Kit 77mmThe close-up lens is the most effective way to achieve a closer minimal focal distance. The magnification achieved depends on the focal range of lenses. It will be higher with longer focal lengths. The magnificaion will be close to 1:1 when focus at 200mm.
NiSi's Close-Up lens is made of double optical corrective glasses with apochromatic design and multi-nano coating to give advanced resolution and a natural color with almost no purple/green fringing both within focus and in bokeh.