A raw pre-record buffer option could be extremely useful, specially for documentary work.
For example: pressing the record button once could make the camera continuously record to the buffer, keeping it half-full, but saving nothing to the card. When the record button is pressed again, then the half-full buffer could be saved to the card and the normal recording activated. This way one would always have a few seconds of footage prior to actually starting the recording.
This would allow one to wait for the right moment and start recording a soon as the moment has happened or started happening and not miss anything. Without a prerecord buffer one is often forced to keep the camera recording, wasting tons of memory in the cards, which is specially impractical when working with raw.
For example: pressing the record button once could make the camera continuously record to the buffer, keeping it half-full, but saving nothing to the card. When the record button is pressed again, then the half-full buffer could be saved to the card and the normal recording activated. This way one would always have a few seconds of footage prior to actually starting the recording.
This would allow one to wait for the right moment and start recording a soon as the moment has happened or started happening and not miss anything. Without a prerecord buffer one is often forced to keep the camera recording, wasting tons of memory in the cards, which is specially impractical when working with raw.