The Caruba Step up/down Ring is a practical accessory for photographers who want to use their lenses flexibly. With an inner diameter of 49 mm and an outer diameter of 67 mm, this adapter allows for the use of filters and other accessories designed for different lens sizes. The ring is specifically developed for the Caruba brand and provides an easy way to ensure compatibility between various filter sizes. By using this adapter, users can expand the creative possibilities of their photography by attaching different filters, such as polarizing or ND filters, to their lenses. The Step up/down Ring is lightweight and compact, making it an ideal companion for on-the-go use. It is a valuable addition to any photography gear and helps enhance the versatility and functionality of the lenses used.