Blackmagic Design ADPT-12GBI/OPT 12G SFP Optical Module Adapter Extend your ATEM Switcher controller farther away when using the Studio Camera 4K with this 12G SFP Optical Module Adapter from Blackmagic Design. Add this SFP module to your ATEM Switcher and/or one to your Studio 4K camera, and you can extend and control your 12G-SDI 4K video signal over fiber optic cable up to 28 miles from each other. The optional ATEM Studio Converter is required for setup, and to add talkback capability, the ATEM Talkback converter is required. When both the SDI and fiber adapter outputs are connected, the first connected device will be active.