Sears KS-2 - Manual (Page 26)

< With Flash Units Other than the Sears Auto/Thyristor (8025) >
1. Set the Shutter Speed Dial to the synchronizing speed of
1/125 sec.
2. The guide number is indicated on the flash unit. Use the
guide number in the following equation to obtain the f-stop
number and set that number to the f-stop index line.
For example. with a flash unit with guide number 40 for ASA 25, and
camera-to-subject distance of 5 feet:
f-stop number (8) = Guide number (40)
--------------------------
Camera-to-subject distance 5 feet
With automatic flash units, set the f-stop number designated for
automatic flash photography.
* It is convenient to use the quick reference table on the flash
unit, which shows the f-stop numbers already calculated.
* When using other automatic flash units, please follow the
instructions with the flash unit.
18. MULTIPLE EXPOSURE PHOTOGRAPHY
Order for Multiple Exposure
Multiple exposure is a device to put more than one exposure into the same frame.