Cowboystudio MA-B Remote Shutter for Nikon D700, D300, D300S, D200, D3, D2H, D2Hs, D2x, D1, D1H, D1x, F100, F6, F5, F90X and F90 Two stage release button: Halfway pressing for auto focus complete pressing takes the picture Lock the button for long exposures or continuous shooting