It's the Cavision Thin Step-Up Ring, a crucial accessory for your camera setup, especially when utilizing a rods support system. This high-quality ring features a front thread of 77mm (80mm outer diameter) and a rear thread of 72mm, with a depth of 8mm, making it an ideal component for your photography or videography equipment. Designed to seamlessly connect different lens sizes, this step-up ring allows for the use of larger filters or accessories on lenses with smaller diameters. Crafted with precision, the Cavision Thin Step-Up Ring ensures a secure fit and optimal performance, enhancing your ability to capture stunning visuals. Whether you're a professional photographer or a passionate hobbyist, this step-up ring is a valuable addition to your gear, helping you achieve the perfect shot every time.