About this item Convert your 77mm thread filter to a magnetic filter, enable you to quickly install and replace thread filters to capture fleeting moments. When the inlaid ring and ring for filter are installed on the thread filter, the thread filter can be transformed into a double-sided magnetic filter. When the inlaid ring is installed on lens, compared to conventional adapter ring, the inlaid ring reduces the distance between the filter and the lens, when multiple magnetic filters are stacked, it can effectively avoid vignetting. Made of Aluminum alloy and magnet,weight only about 13g. Sturdy and lightweight. The Kit includes 3 magnetic adapter rings, a magnetic ring for 77mm thread filter, a magnetic ring for 77mm camera lens and a 77mm magnetic inlaid ring. 77mm Magnetic Filter Adapter Ring Kit Pro - Convert 77mm Screw in Thread Filter to Magnetic Filter Electronics › Camera & Photo › Accessories › Flash Accessories › Adapter Rings Electronics › Camera & Photo › Accessories › Flash Accessories › Adapter Rings Electronics › Camera & Photo › Accessories › Flash Accessories › Adapter Rings Electronics › Camera & Photo › Accessories › Flash Accessories › Adapter Rings