The EP-NZ Hydrophobia Eyepiece for Nikon Z Series Camera from Think Tank Photo is a required watertight accessory for your Hydrophobia rain cover. It allows you to see through the camera's eyepiece once the rain cover is installed. The EP-NZ eyepiece is CNC machined out of Delrin acetal resin and features high-density foam padding. It clicks into place so you know it's sealed and secure.
