[Maximize close -ups] Collect complicated details with a higher magnification and closer distance [Reinforce photo quality] Convert a lens into a micro -lens, whereby the original optical quality is retained [Automatic focus] Built -in electrical pens enable the support for automatic focus, exposure and more [Versatile compatibility] compatible with a variety of NEX E -Mount cameras [Easy to use] Two rings of different lengths can be used individually or combined for different enlargement