Nikon ZF Firmware 2.1

Nikon has released a new firmware upgradet for the Zf. There are a few enhancements that really make this one particular upgrade exciting. 

Fixed an issue that would cause the camera to stop responding or to display error messages when operating the camera after selecting any of the following Picture Controls and then choosing a [Multiple exposure mode] other than [Off]:

• - Cloud Picture Controls daownloaded from the Nikon Imaging Cloud recipes, or
• - Custom Picture Controls saved after adjustment using “Flexible Color” in NX Studio, then imported to the camera.

https://downloadcenter.nikonimglib.com/en/download/fw/559.html