Canon SPEEDLITE EL-1 Advanced User's Manual page 43

Flash Sync Speed and Aperture Value by Shooting Mode
Automatic setting (1/X sec. to 1/60 sec.)*
Automatic setting (1/X sec. to 1/60 sec.)*
Manual setting / automatic setting (1/X sec. -)
Manually setting (1/X sec. to 30 sec., Bulb)
* 1/X second is the maximum flash synchronization shutter speed of each camera.
* 1: According to the setting in cameras that support slow shutter synchronization
Shutter speed
Manually setting (1/X sec. to 30 sec.)
1
1
Automatic setting / manual setting
43
Aperture value
Automatic setting
Automatic setting
Manual setting
Manual setting