The Caruba Step-up/down Ring 55mm - 77mm is a practical accessory for photographers that allows for flexible adjustment of lens filters. With an inner diameter of 55 mm and an outer diameter of 77 mm, this adapter is ideal for using smaller filters on larger lenses or vice versa. Using a step-up/down ring simplifies the use of various filter sizes without the need to purchase multiple filters for different lenses. The ring is finished in a sleek black, giving it a professional appearance that seamlessly integrates into your equipment. Manufactured by Caruba, a renowned provider of photographic accessories, this adapter offers a reliable solution for adapting filters and other accessories. Its robust construction ensures a long lifespan and a secure connection between the lens and filter. This step-up/down ring is therefore a valuable addition to any photographic kit that requires flexibility and versatility in filter application.