2009/12/21 Charles Geilfuss <charles.geilfuss@xxxxxxxxx>:
> My guess would be that the shutter speed is not as fast as you would think
> but that the timing was exquisite. At the beginning of the shot acceleration
> is very high but speed is still relatively slow. I'll guess 1/500 to 1/2000.
But the shell is emerging from the tube, so surely its acceleration
phase is over and it is now moving as fast as it ever will, and
gravity will now be slowing it down again.
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