@shuttario: Powering an old B4 broadcast zoom lens is easy. All you need is a 12-pin Hirose to 12V USB-C cable and a compact yet powerful power bank, like the INIU P781 SnapGo Air 10000mAh. *link in bio Lens: Canon J17 Camera: Sony A6700 @INIU #iniu #iniupowerbank #iniusnapgoair #iniup781