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distance using the guide number of formula
and then set manually on the lens' aperture
ring. The procedure for manual flash photo¬
graphy is as follows:
1
Set the 188A's Aperture/MANU selec¬
tion switch to the lowest position;
"MANU'' will appear in the Aperture/
MANU window
2.
Make sure that the proper ISO film
speed is set on the flash
3
Focus the subject
4
Read the shooting distance from the
lens' distance scale.
5
Calculate the aperture using the fol¬
lowing guide number formula:
guide number
perture
shooting distance
6
Set the aperture on the lens
7
Turn the main switch ON
8
Do not press the shutter button until
the pilot lamp glows.
•
The 188A's guide number is 25 (ISO
100-m) or 41 (ISO 25*ft.)
•
Make sure that both the guide number
arKi shooting distance are in the same
unit, whether meters or feet
•
The guide number changes with him
speed Paste the guide number table
onto the 188A 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
24
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