Canon 188A User Manual
Page 40
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Make sure that both the guide number
and shooting distance are in the same
unit, whether meters or feet
The guide number changes with film
speed Paste the guide number table
onto the 1
8 8 A
for convenient use
If it is necessary to shoot immediately
after the pilot lamp glows, open the
lens 1/2 to one full f/stop This cor
rection is necessary because the flash
is not yet fully charged when the pilot
lamp glows