Canon III-A - Manual (Page 41)

SPEEDLIGHT SYNCHRONIZATION
Speedlight unit Craving not more than 10
millisecond deloyT is connected with a
Canon Extension Cord "A" ( 1 5ft) through a
Canon Self-Extension Adapter fitted to the
flash mounting bracket of the camera. As
for the setting make sure to set the Slow
Shutter;Speed Dial to "X" keeping the
High Shutter Speed Dial at 1/25 sec. DO
NOTjUSE OTHER SPEEDS. Aperture open­
ings (f-stops) should be determined by
instruction given with the speedlight unit.
3 2