Mark Golembeski

Hey gang, I think I found my answer. I spoke with an Arri rep and this is what they said. If you're using EF lenses (in my case, Rokinon primes), you would need the AMC-1 to power the motors, since there is no LBUS connector on the Alexa Mini EF mount (like there is on the PL mount). Also, for using the WCU4 on other camera bodies (such as Epic, Sony, etc), you would also need the AMC-1. But, from what I've also heard, is that yes, you can use the UMC-4 as well. I think the main difference between the two controllers is that the UMC stores lens data and the AMC does not. Hope that helps! Thank you all for your responses.

So would that same UMC-4 motor controller allow me to use my EF lenses on the mini? There's just no way to power the motors if the EF mount is on the camera. Thanks for your reply...

Does anyone know the what control box I need in order to use EF lenses with WCU-4/Alexa Mini setup? Arri has many options such as the AMC-1, UMC, etc. I have many shoots that don't require PL lenses, BUT the EF mount doesn't have the LBUS connector built-in like the PL mount does. Also, would that same control box allow me to use the WCU-4 with a different camera body - such as Red Epic, Sony, etc? I'm not finding many answers on the Internet. Any help is greatly appreciated! Thanks!