This metabones adapter allows attachment of any nikon g dslr lens to micro four thirds mft compact system camera bodies such as the panasonic gh4 and olympus om d e m5 the metabones adapters are made of brass precision machined and plated with chromium plating on both the camera side and lens side to ensure smooth mounting durability and a sophisticated high quality finish please note you will not retain auto functions such as metering and autofocus af