This two-stage remote cord fits the F4s, N70, N2020, N2002 & N8008 cameras, as well as the F3, FM-2 or FM-3A series cameras when equipped with their appropriate motor drives. The F5, F100, N90, N90s, F90 & F90x cameras can be used when accompanied by the MC-25 adapter cord. Pushing the shutter button halfway will activate the metering system; pushing it down all the way will make the exposure.