retractable lens barrel

Select 1 NIKKOR lenses in the Nikon 1 camera system are designed specifically with a retractable lens barrel, for more compact storage when the lens is not being used. A button on the lens barrel is depressed, and the zoom ring rotated to extend the lens barrel for use. And turns the camera on. Select F-mount DSLR NIKKOR lenses also feature a retractable lens barrel for a more compact design.