Available only with cameras compatible with the electromagnetic diaphragm:

As of 5/2019

APS-C digital SLR cameras
(DX format)
D5600, D5500, D5300, D5200, D5100, D3500, D3400, D3300, D3200, D3100
D7500, D7200, D7100, D7000
35mm full-frame digital SLR cameras
(FX format)
D850, D810A, D810, D800E, D800, D750, D610, D600
D5, D4S, D4, D3X

Be sure to update the camera firmware to the latest version.