The Sony HXC - D70 studio camera features a B4 (2/3') mount. It comes with a DXF - 801 viewfinder. Note that it doesn't include an external power supply or a battery, and this model doesn't track usage hours.

Using the Sony HXC - D70 studio camera is straightforward. First, you'll need to connect an external power supply or a battery as it doesn't come with them. Then, attach your desired equipment to the B4 (2/3') mount. The DXF - 801 viewfinder helps you frame your shots accurately. When you're done shooting, turn off the camera properly. As for maintenance, keep the camera clean from dust and moisture. Store it in a dry place and avoid exposing it to extreme temperatures. Since it doesn't track hours, there's no need to worry about hour - based maintenance schedules.