Amazon.com : B4 2/3" 12-Pin to DC 12v Power Cable for Fujinon, Nikon, Canon, Angenieux, Schneider Lens Servo Having a Cable with a Hirose Style 12 Pin Male end : Electronics
TESTS: 1/2" B4 ENG Lenses on the GH4 - 4K Makes it work! Super Wide View & Powered Servo Zoom - YouTube
Mount a B4 lens on your Micro Four Thirds Camera - YouTube
New B4 Broadcast Servo Zoom Lens : r/GH5
GH5s + B4 lens = The Unbeatable setup
Angenieux HR high resolution HD 2x 15x f1.7 zoom b4 lens parfocal bmpcc gh5 arri | eBay
Lens Adapter For Fujinon B4 2/3" Lens to for Panasonic GH5 Micro 4/3 Camera | eBay
Extremely rare B3 B4 mount adapter correction glass lens bmpcc HD arri 4k gh5 | eBay
How To Choose the Right Camera Lens: A Guide – Rokinon
Anyone else rockin' a B4 lens on their GH5? : r/videography
Blackmagic Forum • View topic - B4 Lenses and the URSA Broadcast Camera