Alfred Havlicek, a helicopter pilot in the Austrian army, uses a Leica for aerial photography. Some time ago he found that even exposures of 1/100 sec were blurred. Nevertheless, he did not lose faith in his Leica equipment.
His suspicion, which proved to be correct, was that unnoticeable vibrations of the helicopter had been responsible. On the basis of his photos, the experienced pilot insisted on an immediate inspection.
It was found that the main rotor head was damaged and would definitely have led to a crash before the next scheduled inspection.
The Leica photos therefore prevented a catastrophe.