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Message: <blockquote data-quote="Fred Kingston_RIP" data-source="post: 512007" data-attributes="member: 10742"><p>The Metabones Speedbooster is all about the aperture. All of the Nikon lenses have an F mount... but that's not what Metabones is talking about... The G is a lens feature. It means there's NO aperture ring on the lens and the lens is mechanically actuated by the camera's internals... It's basically closed all the time, and the camera 'opens' the aperture to the selected setting when the shutter fires. The other Nikon lenses operate the same way, but they have an aperture ring that the operator can set... The Metabones accomodates both of those aperture functions.</p></blockquote><p></p>