10721938_ony_HDW_F900R_HDCAM_Camcorders__Benefits_
[Features:] Picture Cache Board [Benefits:] 
The HKDW-703 Picture Cache Board, which was originally developed for the HDW-750 series camcorders, is now compatible with the HDW-F900R. It provides up to eight seconds of loop recording using solid state memory. Thus, when the REC start button is pressed, everything that happened up to eight seconds before that moment can be recorded to tape. In addition, time-lapse and frame-by-frame recording capabilities, known as the interval recording function, can be provided by this option board.
Sony HDW-F900R HDCAM Camcorders
Benefits: