

It is for sports that involve hitting a ball or jumping over things that
timing becomes really important. Timing in this instance means synchronising
the shutter to the precise moment of impact. Any moment before or after this
moment is unlikely to capture the ball in fast sport (eg tennis, cricket,
ice hockey, squash, badminton) although it is not quite such a problem in
soccer or rugby as the ball moves more slowly.
If we take cricket as a worked example we can do some sums. Cricket has the
supreme advantage that most of the action takes place in one spot (ie in
front of the wicket) and this action repeats itself every delivery. In a
50-overs match there are about 300 deliveries, more if you count no balls,
fewer if there is a batting collapse. That represents 600 deliveries for the
whole match and if you shoot two or three frames per delivery, a total of
between 1,200 and 1,800 frames.

In those (say) 1,800 frames there may be 20 dismissals and of these we might
assume 50% are from catches, leaving just 10 per match that are clean
bowled, stumpings, lbws or run-outs. The maths then, is quite simple, only
one frame every 180 is going to contain the bails flying in the air! If you
then factor in a player obscuring your view of the stumps, this 'success'
rate drops even lower.
This then is the problem facing the professional cricket photographer. They
have to shoot every delivery, 'just in case'. They also need more than one
frame per delivery, for, if they time for ball-bat impact and the ball
misses the bat, the second shot of the sequence may contain the bails in the
air, a stumping or a vigorous appeal for a caught behind – all will make a
good shot, most of the time.
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