The Metabones Rollei QBM to Fujifilm X-Mount Camera Lens Mount Adapter allows a Rollei QBM mount lens to be attached to a Fujifilm X-Mount camera. Metabones adapters are quality made, using precision-machined brass with chromium plating on both the camera-body and the lens sides of the adapter in order to ensure smooth mounting, quality aesthetic and durability. Although the lens will fit physically, automatic diaphragm (AE metering), or other auto functions are not retained using this adapter. Metabones uses a special matte-black treatment to keep internal reflections to a minimum in order to maintain the maximum optical quality.