【Compatibility】The first size is the size of the lens(50mm), and the second size is the size of the filter(52/55/58mm).
【Function】Small lenses can be equipped with large-sized filters, while large-sized lenses can be equipped with small-sized filters, saving the trouble of replacing lenses.
【Material】Aluminum alloy,high strength,impact resistance,distortion and pressure.
【Surface】: High mesh mechanical sand blasting,Environmental protection anodizing.
