This BNC Female to DIN 1.0/2.3 RG-59 SDI Cable - 1' from Pro Video Accessories is necessary for connecting devices that employ the smaller DIN 1.0/2.3 connectors to devices that use the more common BNC connection. This is used primarily for 3G/HD/SD-SDI and genlock transmission. Manufacturers that employ the DIN 1.0/2.3 connection (also known as Mini DIN) include RED and Blackmagic Design (for its Hyperdeck line).