APPLICATION: Provide a way to fit larger diameter filters or accessories onto a smaller lens. You don't need to buy more filters when you have different lens.
DURABLE MATERIAL: Made of premium grade aluminum for great durability. Polished and finished with anodized matte surface
WIDE COMPATIBILITY: Compatible with the Canon, Nikon, Sigma, Tamron Camera. Fit most lens with the same filter thread(37mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm)
NOTE: The first number of an adapter ring is always the lens thread size, the second number is the filter size of the accessory. If the first number is smaller, it's a step-up ring