Metabones Nikon G to E-Mount Speed Booster ULTRA 0.71x (Black Matt)

Allows a full frame Rollei QBM lens to be mounted to a Micro Four Thirds mount camera and in doing so, increases the angle of view and increases the maximum aperture one f/stop. Precise fit and solid connection The exterior features a black satin surface finish. A built-in clickless aperture control ring enables manual control of aperture from the speed booster. This 8-stop ring with clearly marked 1/2-stop markings is shipped as clickless but can be converted to "clicked" with the included click ball and spring. The speed booster is compatible with NIKKOR F mount and F Mount G lenses including AI and non-AI mounts. Designed to reach infinity focus. Although the lens will fit physically, automatic diaphragm (AE metering), or other auto functions are not retained using this speed booster. Satin surface finish