["brand new and high quality.\r\n\r\nFeatures:\r\nMake C mount lenses can be used on for F mount cameras.\r\nThere is no ROM connection on the ring so diaphragm control of the lens is set manually .\r\nPlease installing / uninstalling the adapter after turning off the camera.\r\nIt is possible to use macro rings and other accessories.\r\nIt can'for t for focus to for infinity, just for macro shooting (Macro shooting is difficult, please set to maximum aperture to facilitate focusing, turn the focusing ring to complete focusing, then adjust the aperture properly to obtain satisfactory depth of field).\r\nMount Adapter Ring only, other accessories demo in the picture is not included!\r\n\r\nSUITABLE FOR:\r\nlens: C mount lenses.\r\ncamera: for DSLR cameras.\r\n\r\nSpecification:\r\nItem Name: Mount Adapter Ring\r\nMaterial: Aluminium alloy\r\nShape: Round\r\nType: Lens Adapters\r\nOuter Diameter: 4.8cm/1.89''\r\nInner Diameter: 2.5cm/0.98''\r\nColor: Black\r\nQuantity: 1 Pc\r\nNote: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.\r\n 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\r\n\r\nPackage includes:\r\n1 x Mount Adapter Ring (without retail package)"]