ITEM NAME:49mm to 52mmn Metal Step Up Adapter Ring lenses Adapter Ring B3C7 49mm to 52mmn Metal Step Up Adapter Ring lenses Adapter Ring B3C7 The 49-52mm adaptation ring easily screws onto the front of any 49mm lens, and converts the thread of your lens the size of thread of any other 52mm accessory (such as filters, hoods, flashes and lens converters) Fait de haute qualite en aluminium anodise noir (metal). Extremely strong and lightweight Specially designed for your camera for a snug and secure fit. An essential accessory to unlock the full potential of your camera! material: aluminum alloy Color: Black The lens thread of the camera: 49mm / 1.93inch The female threaded accessory: 52mm / 2.05inch item Size: 5.5 * 0.6cm / 2.2 * 0.23in (D * H) Point weight: 4.3 g / 0.15 oz package List: 1 * 49-52mm adapter ring Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm.