From Jerry Huxtable
Feedback mocked the camera which can take pictures before the button is pressed (3 February). The recent BBC series Life in the Undergrowth showed, in the “making of” section at the end, how such a camera is used to capture film of insects which have just done something interesting.
Normally you’d miss the action, but the camera records 15 seconds of video from before you press the button. Of course, this is simply done, as you say, by constantly buffering images.
Whitchurch on Thames, Oxfordshire, UK
