Selecting shutter speed for kendo photography is difficult, because the action is very uneven and explosive. Most of the time, the kendoka are relatively motionless, but the peak of the action is extremely fast and unpredictable (in fact, being unpredictable is part of the game.) The fact that the action usually takes place in a dimly lit gym makes matters even worse, so increasing the exposure time as much as possible is necessary for keeping the noise levels within reasonable limits.
During today’s kata seminar, I experimented with various shutter speeds and found that a setting around 1/650 sec is a reasonable compromise for capturing both the slow- and the fast-moving phases of the action. I was shooting with a 85mm f1.2L
