Reducing ring allows the use of various imaging accessories (such as filters, rings, converters, lenses), lenses having a different diameter. This solution allows primarily to save money spent on these supplements. The adapter ring 58 & gt, 43 mm allows the use of accessory thread diameter 43 mm lenses or adapters thread diameter 58mm. The ring is made from high-quality duralumin. It is made very accurately, which guarantees a perfect fit and full satisfaction from its use.